Technical scheme for construction survey of dam civil works of hydropower station

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This data is the technical scheme for construction survey of dam civil works of hydropower station, 17 pages in total. Introduction: The project is of Grade II, and the scale of the project is large (2) type. The main buildings such as water retaining structures, water release structures and power plant buildings are of Grade II, and the structural safety level of corresponding hydraulic structures is of Grade II; Secondary buildings are Grade 3 buildings, and the structural safety level of corresponding hydraulic structures is Grade II. The main works of the contract include: ① water retaining and release structure works (non overflow dam sections on the left and right banks, flood gate dam sections); ② Power house works; ③ Gate slot embedded parts, grounding and other electrical embedded parts works (flood gate service gate and emergency gate); ④ Trash detention and floating works in the reservoir area; ⑤ Access road works.

Technical Scheme for Construction Survey of Dam Civil Works of Hydropower Station - Figure 1

Technical Scheme for Construction Survey of Dam Civil Works of Hydropower Station - Figure 2

Technical Scheme for Construction Survey of Dam Civil Works of Hydropower Station - Figure 3

Technical Scheme for Construction Survey of Dam Civil Works of Hydropower Station - Figure 4

Technical Scheme for Construction Survey of Dam Civil Works of Hydropower Station - Figure 5

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Dukouba Hydropower Station Dam Complex Civil works construction plan
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Topic: Construction scheme for civil works of power station Construction Contract of Hydropower Civil Works Construction scheme of reservoir and hydropower station project
Dam hydroproject of hydropower station Civil works Construction organization design
The hydropower station is a hybrid power station, which is located in the upstream reach of XX River in XX Township, XX County, XX City. It is the first level of cascade planning of XX River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of XX Township, XX County, 90km away from XX County; The plant is located at XX Ditch, XX Town, 54km away from XX County.

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
Dukouba Hydropower Station Dam Civil works Construction organization design document
Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of Xinzheng Township, Fengjie County, 90km away from Fengjie County; The plant is located at the Dalangou of Pingping Town, 54km away from Fengjie County. The main structures of Dukouba Hydropower Station include water retaining (discharging) structures, water intake structures, diversion structures and power house, with a total installed capacity of 129MW (2 × 64.5MW). Concrete arch dam is a Grade 3 building. The foundation surface elevation is ▽ 470.00m, the dam crest elevation is ▽ 578.50m, and the maximum dam height is 108.5m. Parabolic variable thickness double curvature arch dam is adopted for its shape. The center angle of the crown is 98 °, the maximum half center angle is 46.76 °, and the minimum half center angle is 26.88 °. The maximum radius of curvature of the arch ring center line at the crown beam is 120.6m, the minimum radius of curvature is 53.4m, and the dam axis is 284.123m long. It is divided into 16 dam sections. The dam crest is 4.5m thick, the bottom is 20.0m thick, and the thickness height ratio is 0.18. Grouting gallery, traffic gallery, sump, pump and vent pipe are set inside the dam body, and grouting adit, drainage tunnel, traffic bridge, dam rear bridge and elevator shaft are set outside the dam. The flood discharge structure is located in the middle of the dam. The center line of the overflow weir coincides with the center line of the dam. It is composed of three overflow surface holes with the size of 12m × 12m (width × height). Each hole is equipped with an arc working gate for control, which is opened and closed by a hydraulic hoist. Weir body adopts WES type weir surface curve, and weir top elevation ▽ 563.00m. The front of weir crest adopts 1/4 elliptic curve, the rear of weir crest adopts curve equation, and the outlet adopts downflow. The maximum discharge is 3840m3/s, and the corresponding unit width flow is 116.4m3/s · m. As an energy dissipation structure, the plunge pool is a Grade 3 structure, including plunge pool, secondary dam and apron. The plunge pool is stepped, 165.53m long, 44m wide at the bottom, 79.44m wide at the top, and 469.0m at the lowest bottom elevation. At the end of the plunge pool, there are two dams with high backwater level. The axis is 66m long, 17.5m high, 2.7m wide at the top, 27.2m wide at the bottom, and ▽ 474.5m high at the bottom. There are drainage galleries and pumps in the dam. Behind the two dams, there is a 20m long apron and a toothed wall. The water intake adopts the tower type, which is divided into the upper structure and the lower structure. The substructure includes the water inlet passage, trash rack, trash rack breast wall and bulkhead gate shaft; The upper structure includes the water intake operation and maintenance platform, trash rack hoist chamber, hoist working bridge, bulkhead gate hoist chamber and traffic bridge. The elevation of water inlet bottom plate is ▽ 525.80m, and the elevation of maintenance platform is ▽ 578.50m. The headrace tunnel is arranged along the left bank, 600m long, round, 4.2m in diameter, and is lined with full section concrete. The cofferdam type is overflow cofferdam at the upstream and overflow cofferdam at the downstream. The upstream cofferdam shall be constructed by throwing and filling rubble revetment on the upstream face, reinforcing bar gabion slope pressing on the downstream face and anti-seepage with C20 concrete face slab. The downstream cofferdam is filled with earth and stone, and the structure of composite geomembrane seepage prevention is adopted. In order to meet the needs of mechanical construction, flood control and rescue, traffic and slag removal, the top width of upstream and downstream cofferdams is 8.0m. The upstream cofferdam is 14.4m high, the weir top elevation is ▽ 496.70m, and the axis length is 72.15m. The downstream cofferdam is 6.5m high, the weir top elevation is ▽ 486.80m, and the axis length is 31.3m. The diversion bottom outlet is constructed and blocked, and the diversion tunnel is blocked. The two diversion bottom outlets are arranged on the 8 # and 9 # dam monoliths. The elevation of the bottom outlets is 486.40m, and the size of the bottom outlets is 7m × 7m. The bottom outlets need to be plugged finally. The diversion tunnel is blocked with a gate for temporary water retaining, and the length of the plug is 36m. The construction diversion and water flow control works include river closure, drainage, construction of diversion bottom outlet, preparation of diversion bottom outlet and diversion tunnel plugging, flood control and other works, as well as other relevant temporary works. 1.2 Main contract items and quantities Main contract items include: concrete arch dam works, plunge pool works, water intake works, tunnel works. See the following table for main quantities. The construction period of Dukouba Junction Project is scheduled to start in the middle of July 2007, and the main works will be completed on June 1, 2010. Table 1-2 Main Control Duration

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The drought is common, and the summer drought is prominent. Due to the influence of landform, the local microclimate is obvious. The precipitation in the basin is abundant, but the distribution is uneven throughout the year. The precipitation in the rainy season is from April to October, accounting for 88.2% of the annual precipitation. The precipitation in July is the largest, accounting for 18.0% of the annual precipitation. The dry season precipitation from December to February accounts for about 4.1% of the annual precipitation. The interannual variation of precipitation is large. The average annual precipitation is 1437.2mm, the maximum annual precipitation is 1815.5mm, the minimum annual precipitation is 894.1mm, and the multiple coefficient is 2.03. Rainstorms in the Meixi River basin mostly occur from May to September, and a heavy rainstorm process usually lasts for 1 day to 3 days. Most of the rainfall is concentrated within 24 hours. Affected by the rainstorm in Daba Mountain, the rainstorm often occurs around Jianlou, Jianshan and Dukouba. Temperature: the annual average temperature is 16.8 ℃, the extreme maximum temperature is 39.8 ℃, and the extreme minimum temperature is - 9.2 ℃. Sunshine: annual average sunshine is 1507.4h. Humidity: annual average relative humidity is 69.1%. Wind speed and direction: the annual average wind speed is 1.9m/s, and the wind direction is mostly NE. The annual average maximum wind speed is 14.5m/s, and the measured instantaneous maximum wind speed is 19.0m/s;. Evaporation: annual average evaporation is 1405.4mm. 1.5 External traffic conditions The external traffic conditions of the project are relatively convenient. The project area is 90km away from Fengjie County and 7km away from Xinzheng Township. Fengjie is 119 km upstream from the Yangtze River waterway to Wanxian, 326 km to Fuling, and 446 km to Chongqing; 35 km down to Wushan, 202 km to Yichang, and 2054 km to Shanghai. Water transport conditions are superior. On site transportation: the existing rural roads from Xinzheng Township to Zhuyuan Township and Jiannong Township pass through the left and right banks of the project area. A total of 2.9km of new construction roads are required for the dam access roads on the left and right banks of the dam and the roads connecting the quarry to the screening and mixing system. The road on the left bank is 2.17km long and the road on the right bank is 0.7km long. 6 Construction characteristics and construction measures

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Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir.

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Concrete arch dam is a Grade 3 building. The foundation surface elevation is ▽ 470.00m, the dam crest elevation is ▽ 578.50m, and the maximum dam height is 108.5m. Parabolic variable thickness double curvature arch dam is adopted for its shape. The center angle of the crown is 98 °, the maximum half center angle is 46.76 °, and the minimum half center angle is 26.88 °. The maximum radius of curvature of the arch ring center line at the crown beam is 120.6m, the minimum radius of curvature is 53.4m, and the dam axis is 284.123m long. It is divided into 16 dam sections. The dam crest is 4.5m thick, the bottom is 20.0m thick, and the thickness height ratio is 0.18. Grouting gallery, traffic gallery, sump, pump and vent pipe are set inside the dam body, and grouting adit, drainage tunnel, traffic bridge, dam rear bridge and elevator shaft are set outside the dam.

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The main and auxiliary engines of 1 # cable crane are initially arranged at the same height between 590m and 600m. The main cable axis passes over the diversion structure and the dam flood discharge structure, and the span should be within 400m. 2 # cable crane is not responsible for the installation of dam metal structures, hoists and other equipment. The 2 # cable crane is arranged at an equal height between 574m and 590m. The main cable axis passes over the dam abutment on the left and right banks of the dam, and the span should be within 350m.

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The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir.

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
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Topic: Construction organization design of hydropower station project Construction Contract of Hydropower Civil Works Construction organization design of line civil works
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Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir.

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
[Dukouba Hydropower Station Dam Civil works Construction organization design
Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir.

Topic: Construction Contract of Hydropower Civil Works Civil engineering construction organization design Construction organization design of hydropower station project
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3) Geomembrane construction preparation Before using the geomembrane, various technical indicators of the product shall be tested to meet the requirements of the standard. After finishing, the slope surface before laying the geomembrane shall be flat, dense and smooth to prevent the geomembrane from being punctured and provide a working surface for laying the geomembrane. In order to facilitate the construction and ensure the splicing quality, the geomembrane should be as wide as possible to reduce the amount of on-site splicing. Before construction, it should be cut according to the width of the geomembrane and the length of the site, and spliced into blocks of the required size, which should be manually transported to the working face for laying. Laying of geomembrane

Topic: Fire protection design scheme of hydropower station Construction scheme of hydropower station Cost of hydropower station
Dukouba Hydropower Station Dam Complex Civil works Construction organization design document
Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of Xinzheng Township, Fengjie County, 90km away from Fengjie County; The plant is located at the Dalangou of Pingping Town, 54km away from Fengjie County. The main structures of Dukouba Hydropower Station include water retaining (discharging) structures, water intake structures, diversion structures and power house, with a total installed capacity of 129MW (2 × 64.5MW).

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Shotcrete shall be mixed according to the design mix proportion, and the mix proportion and mixing uniformity shall be checked at least twice per shift. Before spraying, carefully check the tunnel section, clean and treat the underexcavated part and all cracked, broken, water outlet and disintegrated damaged rocks, remove pumice and false debris at the corner of the wall, and wash the rock surface with high-pressure water or wind.

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Topic: Cost of hydropower station Three Gorges Hydropower Station Jinping Hydropower Station
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Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
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The scale of the project is small I type hydropower station, and the project grade is IV. In the project, the barrage dam, headrace tunnel, surge shaft, power house, booster station, etc. of the water intake hub are Level 4 buildings, and other secondary buildings and temporary buildings are Level 5 buildings; The corresponding flood standards for the dam and power house are 50 year return period flood design and 200 year return period flood check; The seismic intensity is VII. The hydropower station is developed by diversion, with an installed capacity of 49800 kw.

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Xxxx Hydropower Station is located on the xx main stream in xxxx County, which is the upper cascade power station of the proposed xxxx Hydropower Station. There is a special railway line from xx to xx Mountain Mine along the river bank in the project area. The hub is located at the downstream side of xx Station on the special railway line from xx to xx Mountain Mine, about 73km north of xx City; The plant site is located about 3.6km upstream of xx station on xx special railway line, with a design water head of about 189m and a total installed capacity of 52.8MW (3 × 17.6 MW). It belongs to Class III medium-sized project. The main buildings are Level 3 buildings, the secondary buildings are Level 4 buildings, and the temporary buildings are Level 5 buildings. The power station is composed of hydroproject, diversion and power generation tunnel, surge shaft, penstock, ground powerhouse and other buildings.

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
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Content introduction 5.6.4 Tunnel stonework excavation The tunnel excavation in this section adopts full face one-time blasting excavation construction. YT-28 rock drill is selected as drilling equipment. Detonating tube is used for blasting in sections, and smooth hole is detonated with detonating wire, and millisecond delay blasting is carried out from inside to outside in turn. Ventilation and smoke exhaust after blasting. Then, after the safety inspection and danger elimination of the working face, the mucking will be started. The mucking from tunnel rock excavation will be loaded by loader and transported by 10t dump truck. The construction procedure is as follows: drilling and blasting design - measuring and hole arrangement - drilling - acceptance, charging - hole plugging - networking, blasting - ventilation, smoke exhaust - danger elimination - slag removal - (support) - entering the next excavation cycle. (1) The tunnel excavation length of this section is 600m in the drilling and blasting design. From the geological data, for the tunnel excavation area crossing the gas, strengthen the gas detection, smoke exhaust and ventilation, and take safety precautions to ensure the safety of tunnel excavation construction. The blasting design of various surrounding rocks shall be completed before construction, and the blasting design parameters shall be modified in time according to the blasting effect during construction. Due to geological changes, when the tunnel passes through weak surrounding rocks or faults, the blasting method shall be adjusted in time, and the initial support shall be strengthened by using a steel lattice framework (φ 2mm). Vertical barrel cut is adopted for blasting excavation. The cut hole is 3.0m deep, and the blast hole is 2.5m deep. Smooth blasting is adopted around the hole, with hole depth of 2.5m and hole spacing of 0.5m. The preliminary blasting parameters are as follows: 1) The diameter of the cutting hole: Φ 45mm; Drilling depth: 3m; Spacing: 0.8m; Row spacing: 0.8m; Diameter of drug roll: Φ 32mm; Single hole charge: 1.6Kg/hole. 2) The borehole diameter of the caving hole is φ 45mm, the spacing between rows is 80cm, the drilling depth is 2.5m, the diameter of the cartridge roll is φ 32mm, and the single hole charge is 1.0kg/hole. 3) Drilling diameter of peripheral smooth blasting hole: Φ 45mm; Drilling depth: 2.5m; Spacing: 0.5m; Diameter of drug roll: Φ 25mm; Single hole charge: 0.75Kg/hole. The above blasting parameters for tunnel excavation shall be tested on site before formal excavation, and the optimal blasting parameters shall be selected and submitted to the supervisor for approval. At the same time, during the excavation process, experience shall be continuously summarized, and then suggestions for modification shall be put forward, which shall be implemented after being approved by the supervisor to make the blasting design more realistic. (2) In order to achieve a good blasting effect, the hole opening error of the blasthole shall not be greater than 3cm for the cut hole and the surrounding holes, the rest of the holes shall not be greater than 5cm, and the direction deviation of all blastholes shall not be greater than 3cm/m. TAPS tunnel laser polar coordinate section measuring instrument is used to accurately measure the centerline level. Use TAPS laser profiler to automatically arrange holes. (3) The YT-28 rock drill is used to drill holes for the excavation of the drilling tunnel. The cutting hole is 3.0m deep, the blasting hole is 2.5m deep, and the smooth blasting is used around the hole. The hole depth is 2.5m, and the hole spacing is 0.5m. Over drilling of 20cm is allowed. (4) After the acceptance and charging of YT-28 rock drill, the professional quality personnel shall check the hole depth, hole spacing, hole location and other hole making quality one by one, and the charging construction can be carried out only after the inspection is qualified. Emulsion explosives shall be used as blasting materials.

Topic: Construction organization design of hydropower station project Fire protection design of hydropower station project Estimate of hydropower project
Dukouba Hydropower Station Dam in a city Civil works Construction organization design
As the construction site of this section is narrow and small, it is difficult to arrange temporary facilities. In order to facilitate construction, temporary buildings will be arranged in centralized areas. The living camp and processing plant are arranged at the downstream of the right bank, 2km away from the dam site in Zhongjiaping District. The gravel processing system and concrete mixing system are centrally arranged near the upstream dam site on the left bank. The mountain here is relatively gentle, and the amount of site leveling work is relatively small. The centralized layout is also convenient for management. Temporary construction projects such as explosive magazine, air compression station and water pool are scattered in corresponding areas according to construction needs.

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
Dukouba Hydropower Station Dam Complex Civil works Construction Organization Design (formal). doc

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
Dukouba Hydropower Station Dam Complex Civil works Construction Organization Design (formal). pdf

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
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This data is the construction organization design scheme for the civil works of the dam hub of Dukouba Hydropower Station, which is detailed and can be used for reference.

Topic: Construction scheme for civil works of power station Construction organization design of hydropower station project Civil engineering construction organization design
A dam pivot of Dukouba Hydropower Station Civil works Construction organization design scheme
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Topic: Construction scheme for civil works of power station Construction organization design of hydropower station project Civil engineering construction organization design
Dukouba Hydropower Station Dam Complex Civil works Construction organization design (formal)
The project uses all artificial sand and gravel aggregates. In order to meet the needs of concrete pouring, the production capacity of the artificial sand and gravel processing system is appropriately increased (the actual required strength is 200t/h, and the production capacity of the sand and gravel processing system that our department plans to design is 220t/h), and the crusher and screening building with good performance are selected.

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
Dukouba Hydropower Station Dam Complex Civil works Construction design scheme (formal)
9.1 Air supply for construction The air supply for this project mainly meets the needs of rock excavation for the main works. There is also a small amount of air supply to meet the needs of foundation cleaning, anchor bolt and roughing. The rock excavation of the main body of the project totals 723700 m3. 1 # air compression station is set up on the right bank, and 2 # air compression station is set up on the left bank. Each air compression station is centrally arranged with four 20m3/min fixed electric air compressors for centralized air supply, assisted by five 12m3/min mobile diesel air compressors. The total wind power is 220m3/min. Air supply for construction such as left and right bank abutment, water intake, headrace tunnel and plunge pool rock excavation 100 type down the hole drilling tool (mobile 351 hydraulic drill is used for the main blast hole), anchor spray support, etc. The quarry is equipped with four 12m3/min mobile diesel air compressors for air supply. The φ 150mm main pipe is laid from the air pressure station to the construction site, and then the sheath pipe is connected to the 100 type down the hole drill at the drilling site (the main blast hole is drilled with the mobile 351 hydraulic drill). φ 150mm main air supply pipe is 200m long. The production air of the concrete mixing system is supplied by two v-6/7 air compressors. 2.9.2 Construction water supply According to the site conditions, five production pools are arranged for the construction water of the project, which is ▽ 630m beside the crushing and screening system

Topic: Fire protection design scheme of hydropower station Construction scheme of hydropower station Cost of hydropower station
A large hydropower station dam in southwest China Civil works Construction organization design scheme
Strengthen the inspection, tracking and supervision of the plan, establish a system to check the progress of the project and the implementation of the plan, focus on the construction arrangement of key projects, and take into account the construction of other projects. Carefully analyze, make full estimation and preparation in all aspects, and ensure the smooth implementation of the construction period plan

Topic: Construction organization design of hydropower station project Construction Scheme of Large Hydropower Station Project Fire protection design scheme of hydropower station
Hydropower dam Civil works Roller compacted concrete construction organization design scheme
The RCC of this project shall be fully and evenly mixed to meet the working degree requirements of construction. The feeding sequence (mandatory building) is initially proposed to be sand → cement+fly ash → (water+admixture) → small stone → medium stone → large stone.

Topic: Fire protection design scheme of hydropower station Construction organization design of hydropower station project Construction scheme of hydropower station
Hydropower dam Civil works Design scheme of roller compacted concrete construction method
The RCC pouring notice of this project shall be filled in by the Engineering Technology Department and sent to the production command department 10~12 hours in advance to the quality management department, the test center, the mixing area, the pouring area and other relevant units. The test center shall sign and issue the concrete batching sheet 30 minutes before the start of the mixing plant after the warehouse surface acceptance.

Topic: Fire protection design scheme of hydropower station Construction scheme of hydropower station Cost of hydropower station
Dukouba Hydropower Station Dam Complex Civil works Complete construction organization design
Dukouba Hydropower Station is a hybrid power station, located in the upper reaches of Meixi River in Xinzheng Township, Fengjie County, Chongqing, which is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of Xinzheng Township, Fengjie County, 90km away from Fengjie County; The plant is located at the Dalangou of Pingping Town, 54km away from Fengjie County. The main structures of Dukouba Hydropower Station include water retaining (discharging) structures, water intake structures, diversion structures and power house, with a total installed capacity of 129MW (2 × 64.5MW).

Topic: Construction organization design of hydropower station project Cost of hydropower station Three Gorges Hydropower Station
Dukouba Hydropower Station Dam Complex Civil works Construction organization design (formal)
The main contents of this data include: project overview, general construction layout Construction description of diversion and construction drainage, general construction schedule, earthwork, grouting, concrete, masonry, prototype observation, main mechanical equipment and labor allocation, organization, construction quality assurance system and measures, construction safety assurance system and measures, and environmental protection during construction. Chapter I Project Overview 1.1 Project Overview Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of Xinzheng Township, Fengjie County, 90km away from Fengjie County; The plant is located at the Dalangou of Pingping Town, 54km away from Fengjie County. The main structures of Dukouba Hydropower Station include water retaining (discharging) structures, water intake structures, diversion structures and power house, with a total installed capacity of 129MW (2 × 64.5MW). Concrete arch dam is a Grade 3 building. The foundation surface elevation is ▽ 470.00m, the dam crest elevation is ▽ 578.50m, and the maximum dam height is 108.5m. Parabolic variable thickness double curvature arch dam is adopted for its shape. The center angle of the crown is 98 °, the maximum half center angle is 46.76 °, and the minimum half center angle is 26.88 °. The maximum radius of curvature of the arch ring center line at the crown beam is 120.6m, the minimum radius of curvature is 53.4m, and the dam axis is 284.123m long. It is divided into 16 dam sections. The dam crest is 4.5m thick, the bottom is 20.0m thick, and the thickness height ratio is 0.18. Grouting gallery, traffic gallery, sump, pump and vent pipe are set inside the dam body, and grouting adit, drainage tunnel, traffic bridge, dam rear bridge and elevator shaft are set outside the dam. The flood discharge structure is located in the middle of the dam. The center line of the overflow weir coincides with the center line of the dam. It is composed of three overflow surface holes with the size of 12m × 12m (width × height). Each hole is equipped with an arc working gate for control, which is opened and closed by a hydraulic hoist. Weir body adopts WES type weir surface curve, and weir top elevation ▽ 563.00m. The front of weir crest adopts 1/4 elliptic curve, the rear of weir crest adopts curve equation, and the outlet adopts downflow. The maximum discharge is 3840m3/s, and the corresponding unit width flow is 116.4m3/s · m. As an energy dissipation structure, the plunge pool is a Grade 3 structure, including plunge pool, secondary dam and apron. The plunge pool is stepped, 165.53m long, 44m wide at the bottom, 79.44m wide at the top, and 469.0m at the lowest bottom elevation. At the end of the plunge pool, there are two dams with high backwater level. The axis is 66m long, 17.5m high, 2.7m wide at the top, 27.2m wide at the bottom, and ▽ 474.5m high at the bottom. There are drainage galleries and pumps in the dam. Behind the two dams, there is a 20m long apron and a toothed wall. The water intake adopts the tower type, which is divided into the upper structure and the lower structure. The substructure includes the water inlet passage, trash rack, trash rack breast wall and bulkhead gate shaft; The upper structure includes the water intake operation and maintenance platform, trash rack hoist chamber, hoist working bridge, bulkhead gate hoist chamber and traffic bridge. The elevation of water inlet bottom plate is ▽ 525.80m, and the elevation of maintenance platform is ▽ 578.50m. The headrace tunnel is arranged along the left bank, 600m long, round, 4.2m in diameter, and is lined with full section concrete. The cofferdam type is overflow cofferdam at the upstream and overflow cofferdam at the downstream. The upstream cofferdam shall be constructed by throwing and filling rubble revetment on the upstream face, reinforcing bar gabion slope pressing on the downstream face and anti-seepage with C20 concrete face slab. The downstream cofferdam is filled with earth and stone, and the structure of composite geomembrane seepage prevention is adopted. In order to meet the needs of mechanical construction, flood control and rescue, traffic and slag removal, the top width of upstream and downstream cofferdams is 8.0m. The upstream cofferdam is 14.4m high, the weir top elevation is ▽ 496.70m, and the axis length is 72.15m. The downstream cofferdam is 6.5m high, the weir top elevation is ▽ 486.80m, and the axis length is 31.3m. The diversion bottom outlet is constructed and blocked, and the diversion tunnel is blocked. The two diversion bottom outlets are arranged on the 8 # and 9 # dam monoliths. The elevation of the bottom outlets is 486.40m, and the size of the bottom outlets is 7m × 7m. The bottom outlets need to be plugged finally. The diversion tunnel is blocked with a gate for temporary water retaining, and the length of the plug is 36m. The construction diversion and water flow control works include river closure, drainage, construction of diversion bottom outlet, preparation of diversion bottom outlet and diversion tunnel plugging, flood control and other works, as well as other relevant temporary works. 1.2 Main contract items and quantities Main contract items include: concrete arch dam works, plunge pool works, water intake works, tunnel works. See the following table for main quantities. The construction period of Dukouba Junction Project is scheduled to start in the middle of July 2007, and the main works will be completed on June 1, 2010. Meixi River belongs to the middle subtropical warm humid monsoon climate zone, with mild climate, abundant rainfall, four distinct seasons, suitable lighting, long frost free period, frequent dry winter, and prominent summer drought. Due to the impact of topography, local microclimate features are obvious. The precipitation in the basin is abundant, but the distribution is uneven throughout the year. The precipitation in the rainy season is from April to October, accounting for 88.2% of the annual precipitation. The precipitation in July is the largest, accounting for 18.0% of the annual precipitation. The dry season precipitation from December to February accounts for about 4.1% of the annual precipitation. The interannual variation of precipitation is large. The average annual precipitation is 1437.2mm, the maximum annual precipitation is 1815.5mm, the minimum annual precipitation is 894.1mm, and the multiple coefficient is 2.03. Rainstorms in the Meixi River basin mostly occur from May to September, and a heavy rainstorm process usually lasts for 1 day to 3 days. Most of the rainfall is concentrated within 24 hours. Affected by the rainstorm in Daba Mountain, the rainstorm often occurs around Jianlou, Jianshan and Dukouba. Temperature: the annual average temperature is 16.8 ℃, the extreme maximum temperature is 39.8 ℃, and the extreme minimum temperature is - 9.2 ℃. Sunshine: annual average sunshine is 1507.4h. Humidity: annual average relative humidity is 69.1%. Wind speed and direction: the annual average wind speed is 1.9m/s, and the wind direction is mostly NE. The annual average maximum wind speed is 14.5m/s, and the measured instantaneous maximum wind speed is 19.0m/s;. Evaporation: annual average evaporation is 1405.4mm. 1.5 External traffic conditions The external traffic conditions of the project are relatively convenient. The project area is 90km away from Fengjie County and 7km away from Xinzheng Township. Fengjie is 119 km upstream from the Yangtze River waterway to Wanxian, 326 km to Fuling, and 446 km to Chongqing; 35 km down to Wushan, 202 km to Yichang, and 2054 km to Shanghai. Water transport conditions are superior. On site transportation: the existing rural roads from Xinzheng Township to Zhuyuan Township and Jiannong Township pass through the left and right banks of the project area. A total of 2.9km of new construction roads are required for the dam access roads on the left and right banks of the dam and the connecting roads between the quarry and the screening and mixing system. The left bank road is 2.17km long, and the right bank road is 0.7km long A total of 190 pages.

Topic: Construction organization design of hydropower station project Construction scheme of hydropower station project Construction Contract of Hydropower Station Project
A dam pivot of Dukouba Hydropower Station Civil works Construction organization design scheme (formal)
The external transportation conditions of the project are relatively convenient. The project area is 90km away from Fengjie County and 7km away from Xinzheng Township.

Topic: Construction scheme for civil works of power station Construction Contract of Hydropower Civil Works Civil engineering construction organization design
The head hydroproject dam of a hydropower station in Wenshan, Yunnan Province Civil works Construction organization design
Content introduction 1.2 Project overview xx Hydropower Station is located on the main stream of Panlong River in Malipo County, Wenshan Prefecture, Yunnan Province. The dam site is 36km away from the highway in Malipo County, 116km away from Wenshan Prefecture, and 447km away from Kunming. The power station is a diversion type power station. The maximum dam height of Phase I project is 40m, the normal pool level is 515.00m, and the corresponding storage capacity is 415 × 104m3; The dead water level is 508.00m, and the corresponding storage capacity is 143 × 104m3; The regulating storage capacity is 272 × 104m3, and the installed capacity is 2 × 50MW. The hydroproject layout is mainly composed of head hydroproject, pressure diversion tunnel, surge shaft, buried pipes and ground powerhouse. The head hydroproject consists of 10 dam sections, including the power station intake, flood discharge and diversion bottom outlet dam section, surface outlet overflow dam section, left and right bank non overflow dam sections. The concrete gravity dam has a crest length of 139.00m, a crest elevation of 518.00m, a crest width of 4~6.5m, a maximum dam height of 40m, and a maximum dam bottom width of 35m. The overflow dam section is 65.5m long, and the bottom outlet (6m × 7m) dam section (with a flat bulkhead gate and an arc type service gate) and the power station intake (4.2m × 4.2m) dam section (41.5m long) are arranged on the right bank, which are both built on weakly weathered granite gneiss; The left bank is a non overflow dam section, 32.00m long, built on weakly weathered granite. The dam body is provided with anti-seepage curtain and drainage, which extends along the dam axis to both banks. The control standard of anti-seepage curtain is 5Lu.

Topic: Construction scheme of head hydroproject Yunnan Construction Contract Budget estimate of Yunnan Province
Dukouba Hydropower Station Dam Complex Civil works Construction organization design scheme (formal)
Construction Organization Design Scheme for Civil Works of Dukouba Hydropower Station Dam Complex (formal) Construction Organization Design Scheme for Civil Works of Dukouba Hydropower Station Dam Complex (formal)

Topic: Construction organization design of hydropower station project Fire protection design scheme of hydropower station Construction scheme of hydropower station project
Dukouba Hydropower Station Dam Civil works Construction organization design proposal
Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of Xinzheng Township, Fengjie County, 90km away from Fengjie County; The plant is located at the Dalangou of Pingping Town, 54km away from Fengjie County. The main structures of Dukouba Hydropower Station include water retaining (discharging) structures, water intake structures, diversion structures and power house, with a total installed capacity of 129MW (2 × 64.5MW). Concrete arch dam is a Grade 3 building. The foundation surface elevation is ▽ 470.00m, the dam crest elevation is ▽ 578.50m, and the maximum dam height is 108.5m. Parabolic variable thickness double curvature arch dam is adopted for its shape. The center angle of the crown is 98 °, the maximum half center angle is 46.76 °, and the minimum half center angle is 26.88 °. The maximum radius of curvature of the arch ring center line at the crown beam is 120.6m, the minimum radius of curvature is 53.4m, and the dam axis is 284.123m long. It is divided into 16 dam sections. The dam crest is 4.5m thick, the bottom is 20.0m thick, and the thickness height ratio is 0.18. Grouting gallery, traffic gallery, sump, pump and vent pipe are set inside the dam body, and grouting adit, drainage tunnel, traffic bridge, dam rear bridge and elevator shaft are set outside the dam. The flood discharge structure is located in the middle of the dam. The center line of the overflow weir coincides with the center line of the dam. It is composed of three overflow surface holes with the size of 12m × 12m (width × height). Each hole is equipped with an arc working gate for control, which is opened and closed by a hydraulic hoist. Weir body adopts WES type weir surface curve, and weir top elevation ▽ 563.00m. The front of weir crest adopts 1/4 elliptic curve, the rear of weir crest adopts curve equation, and the outlet adopts downflow. The maximum discharge is 3840m3/s, and the corresponding unit width flow is 116.4m3/s · m. As an energy dissipation structure, the plunge pool is a Grade 3 structure, including plunge pool, secondary dam and apron. The plunge pool is stepped, 165.53m long, 44m wide at the bottom, 79.44m wide at the top, and 469.0m at the lowest bottom elevation. At the end of the plunge pool, there are two dams with high backwater level. The axis is 66m long, 17.5m high, 2.7m wide at the top, 27.2m wide at the bottom, and ▽ 474.5m high at the bottom. There are drainage galleries and pumps in the dam. Behind the two dams, there is a 20m long apron and a toothed wall.

Topic: Construction scheme for civil works of power station Construction Contract of Hydropower Civil Works Civil engineering construction organization design
Dukouba Hydropower Station Dam Complex Civil works Text of construction organization design scheme
Dukouba Hydropower Station is a hybrid power station located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing. It is the first level of cascade planning of Meixi River. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of Xinzheng Township, Fengjie County, 90km away from Fengjie County; The plant is located at the Dalangou of Pingping Town, 54km away from Fengjie County. The main structures of Dukouba Hydropower Station include water retaining (discharging) structures, water intake structures, diversion structures and power house, with a total installed capacity of 129MW (2 × 64.5MW). Concrete arch dam is a Grade 3 building. The foundation surface elevation is ▽ 470.00m, the dam crest elevation is ▽ 578.50m, and the maximum dam height is 108.5m. Parabolic variable thickness double curvature arch dam is adopted for its shape. The center angle of the crown is 98 °, the maximum half center angle is 46.76 °, and the minimum half center angle is 26.88 °. The maximum radius of curvature of the arch ring center line at the crown beam is 120.6m, the minimum radius of curvature is 53.4m, and the dam axis is 284.123m long. It is divided into 16 dam sections. The dam crest is 4.5m thick, the bottom is 20.0m thick, and the thickness height ratio is 0.18. Grouting gallery, traffic gallery, water collecting well, pumping pump and vent pipe are set inside the dam body, and grouting adit, drainage tunnel, traffic bridge, dam rear bridge and elevator shaft are set outside the dam

Topic: Construction scheme for civil works of power station Construction Contract of Hydropower Civil Works Civil engineering construction organization design
Dukouba Hydropower Station Dam Complex Civil works Construction organization design (formal)
Dukouba Hydropower Station is a hybrid power station, located in the upper reaches of Meixi River, Xinzheng Township, Fengjie County, Chongqing, which is the first level of Meixi cascade planning. The dam site area controls a drainage area of 765km2, with an average annual flow of 18.2m3/s. The power station is a Grade III medium-sized project mainly for power generation, with comprehensive benefits such as tourism and flood control. The total storage capacity of the reservoir is 98.54 million m3, and the effective storage capacity is 70.11 million m, which is an annual regulation reservoir. The dam site is located 7km upstream of Xinzheng Township, Fengjie County, 90km away from Fengjie County; The plant is located at the Dalangou of Pingping Town, 54km away from Fengjie County. The main structures of Dukouba Hydropower Station include water retaining (discharging) structures, water intake structures, diversion structures and power house, with a total installed capacity of 129MW (2 × 64.5MW). Concrete arch dam is a Grade 3 building. The foundation surface elevation is ▽ 470.00m, the dam crest elevation is ▽ 578.50m, and the maximum dam height is 108.5m. Parabolic variable thickness double curvature arch dam is adopted for its shape. The center angle of the crown is 98 °, the maximum half center angle is 46.76 °, and the minimum half center angle is 26.88 °. The maximum radius of curvature of the arch ring center line at the crown beam is 120.6m, the minimum radius of curvature is 53.4m, and the dam axis is 284.123m long. It is divided into 16 dam sections. The dam crest is 4.5m thick, the bottom is 20.0m thick, and the thickness height ratio is 0.18. Grouting gallery, traffic gallery, sump, pump and vent pipe are set inside the dam body, and grouting adit, drainage tunnel, traffic bridge, dam rear bridge and elevator shaft are set outside the dam.

Topic: Construction organization design of hydropower station project Cost of hydropower station Three Gorges Hydropower Station