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Special Construction Scheme for Xiaoqi Tunnel Entry

The project is Zhangzhou Hua'an Section of Zhangzhou Yong'an Connecting Line of Expressway Network in the Economic Zone on the West Coast of the Straits. The starting point of the contract section (A9) is located in Hulin Township, Hua'an County, with the starting point stake number of K63+246.000, and the starting point is located on the separated subgrade Tunnel Then it reaches the end point of the project K67+195.696 and connects with the starting point of Longyan section of Zhangzhou Yong'an interconnection line. The total length of the contract section is 3.95 km (the left line is 3915 m long and the right line is 3947 m long). The design speed of the whole line is 80km/h, two-way four lane. The tunnel is covered with silty clay, and the underlying bedrock is tuff lava and tuffaceous sandstone. Grade III surrounding rock is 4510m, Grade IV surrounding rock is 1965m, Grade V surrounding rock is 937m, and the tunnel portal is 50m.

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Special Construction Scheme for Xiaoqi Tunnel Entry - Figure 1

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River crossing tunnel shield arrives at the tunnel entrance programme
The total length of the shield tunnel in this project is 3532.442 single track meters, of which the east line is 1765.478m long and the west line is 1766.924m long. The outer diameter of the segment is 11.3m, the inner diameter of the segment is 10.3m, the thickness of the segment is 50cm, and the ring width is 2m. The general wedge ring is divided into blocks in the form of "6+2+1", assembled in staggered joints, and connected with high-strength bolts in the longitudinal and circumferential directions. The shield tunnel is driven by two Φ 11.68m slurry balance shield machines with a length of 11.71m. The two shield machines are excavated from the shield working shaft in Jiangnan (Xiaoshan side) to Jiangbei (Hangzhou side). The longitudinal slope of the eastern line of the tunnel arrival section is 3.25%, and the longitudinal slope of the western line is 3.1%. On the line plane, the western line tunnel is a straight line section, and the eastern line tunnel is at R=1500m On the circular curve, the diameter of the portal of the arrival section is 12.1m. The shield tunnel in the arrival section is driven along Qingchun East Road in Hangzhou towards the Jiangbei working shaft. The ground above the tunnel is mainly the road surface of Qingchun East Road and the green belt along the line.

Topic: Shield construction scheme for river crossing tunnel Construction scheme for tunnel entrance Special construction scheme for tunnel entry
Entry of Badi Tunnel programme (Revised)
Pinggu A1 contract section is located in Pingnan County, starting from the north of Badichengguan and connecting with the Badi connecting line of Ningwu Expressway. The route passes through Badichengguan, Badi, Badi and Bandou in Pingnan County, and ends at Zheyang Village, Gantang Town, where the contract section ends at K12+600. The total length of the contract section is 12.6 km. It mainly includes bridge, tunnel and subgrade works. Badi Tunnel, the left line is 891m long, starting and ending stake numbers are ZK8+024 ～ ZK8+915; The right line is 861m long, and the starting and ending stake numbers are K8+025 ～ K8+886.

Topic: Construction scheme for tunnel entrance Construction Scheme for Shallow Buried Tunnel Entry Special construction scheme for multi arch tunnel entry
Special construction of tunnel with unfavorable geology programme
Two tunnels are arranged in this contract section, namely XX tunnel (the second half) and XX tunnel (the first half). 1. XX Tunnel is a four lane expressway tunnel with left and right lines separated, located in the east of XX Village, XX Township, XX County, XX Province. The starting and ending stake number of the left line of the tunnel is ZK+130-ZK4+725, with a total length of 595m, which belongs to a medium stone tunnel. The starting and ending stake number of the right line is YK4+512-YK5+740, with a total length of 1228m, belonging to a long stone tunnel. Longitudinal slope of left line - 2.8%; - 2.6% for the right line. The entrance and exit are all end wall portal. The tunnel in this contract section covers the right line YK5+120-YK5+740 with a length of 620m, the left line ZK4+400-ZK4+725 with a length of 325m, and the total length of the left and right lines is 945m. 2. XX tunnel is a separated four lane expressway tunnel with left and right lines separated, which is located in the east of XX Village, XX Township, XX County, XX Province. The starting and ending stake number of the left line of the tunnel is ZK8+883-ZK8+725, with a total length of 1842m, and the starting and ending stake number of the right line is YK10+908-YK10+698, with a total length of 1790m. The longitudinal slope of the tunnel is one-way, and the longitudinal slope of the left line is - 0.5%; The right line is -0.55%. It is a long stone tunnel, and the entrance and exit are all end wall portals. The scope of the tunnel in this contract section is right line YK8+908-YK8+800, 892m long left line ZK8+883-ZK9+800, 917m long, 1809m long left and right lines.

Topic: Special construction scheme for tunnel with unfavorable geology Construction measures for tunnel with unfavorable geology Construction Technology of Tunnel in Unfavorable Geology
Special construction of shallow buried tunnel programme
The starting point of Lot II of Huandao Road (Aoshan Road Gaodian No. 2 Road Section) Project is under Haidi Road, and the ending point is connected to the left and right auxiliary roads of Xinglin Bridge in the direction of Chang'an Road. The stake number range is ZK1+738 ～ ZK2+870, and YK1+740 ～ YK2+892.270. The total length of the line is 1.152km. The tunnel works of this project are the controlling works of the whole project and the node works that restrict the construction period of the whole project. Tunnel works can be divided into open excavation and backfill construction sections (ZK2+038~ZK2+229, YK2+050~YK2+211) and shallow excavation and shallow burial construction sections (ZK1+738~ZK2+050, YK1+740~YK2+038). Among them, the difficult point of tunnel construction is the construction section of concealed excavation and shallow burial. The underground tunnel has the characteristics of poor geological conditions, rich groundwater, shallow burial depth, and many railway lines underneath.

Topic: Special construction scheme for shallow buried tunnel Safe construction scheme for shallow buried and concealed excavation Construction method of shallow buried and concealed excavation
Special construction of tunnel secondary lining programme
The tunnel is designed according to the principle of the New Austrian Tunneling Method, and the structure is a composite lining type composed of anchor, mesh, shotcrete and steel arch frame, which combines the initial support with the secondary formwork concrete; C30 waterproof concrete is used for the secondary lining, and the impermeability grade is not less than S8. Ordinary C25 concrete is used for the inverted arch. The inner contour of the tunnel main tunnel and emergency parking area is generally in the form of three center circle and curved side wall; Arch wall adopts 1.5mm thick composite waterproof coiled material

Topic: Special construction scheme for tunnel secondary lining General tunnel lining construction scheme Construction Technology of Tunnel Secondary Lining
Special construction of Guangshan Tunnel programme --Latest
(1) Jinning Hongta Expressway is an important part of the infrastructure construction of Kunming and Yuxi. The implementation of the project has made the road networks of Kunming and Yuxi more perfect. It is one of the important regional road networks of the two cities, an important part of Yuxi Ring Expressway, and an important section of Kunming Moxi Expressway. The starting point of the expressway route is K0+000, located in Lihe Village, southwest of Jinning County, Kunming City, and connected to the southwest section of Kunming Ring Expressway (Anjin Expressway); The end point of the route (K49+540) is located in Feijing Village, Yuxi City. The main line is constructed according to the two-way six lane standard, with the design speed of 100Km/h and the subgrade width of 33.5m; the interchange connecting line is constructed according to the standard of Class I highway, with the design speed of 60km/h and the subgrade width of 23.0m; the design load of bridges and culverts is Class I highway, and other technical indicators are in line with the specified values in the Technical Standards for Highway Engineering (JTGB01-2003) issued by the Ministry.

Topic: The latest special construction scheme of high-speed tunnel Latest special construction scheme for formwork Template of the latest special construction scheme
Special construction of Nanhan tunnel portal programme
Nanhan Tunnel is a separated long tunnel, with the starting mileage of ZK1+810 and the ending mileage of ZK4+220 on the left side and a total length of 2410m; the starting mileage of K1+750 and the ending mileage of K4+215 on the right side, with a total length of 2465m and a total length of 4875m. R1=5.5m headroom lining section is adopted, with the inner contour headroom width of 11.0m and headroom height of 7.1m. The tunnel is designed with 6 pedestrian cross passages, 3 vehicle cross passages, and 3 emergency parking areas. The right line portal at the entrance end is end wall portal, and the rest are bamboo cut portal. The overburden of the tunnel is Quaternary eluvial deluvial layer, in which the sandy gravel is grayish white, strongly weathered, weakly cemented, with poor diagenesis and scouring resistance; Silty clay is brown yellow, hard plastic and slightly wet. The surrounding rock of the outlet section is mainly loose slightly dense round gravel soil, hard plastic silty clay and strongly weathered gravel. Most of them are in loose structure, with relatively deep burial depth. The surrounding rock is prone to collapse, and the surface is prone to subsidence. The stability of the side and front slopes is poor, and the water yield property of rock and soil mass is strong.

Topic: Special construction scheme for tunnel portal Construction scheme of tunnel portal under eccentric pressure Construction scheme of eccentric pressure retaining wall at tunnel portal
Special construction for tunnel excavation programme (Revised)
YQZQ-10 The starting and ending mileage of our department is D1K239+355.98~D1K290+554.27, which is located between Goujiang, Zunyi City and Xifeng County, Guiyang City. The main line is 51.198km long. It includes 26 tunnels with a total length of 17545m. It belongs to the central and eastern edge of Yunnan Guizhou Plateau. The area is 800-1000m above sea level and belongs to karst landform area with many karst areas. The overburden is Quaternary slope eluvial rock (Q4dl+el) red clay, underlain by Triassic middle Songzikan Formation (T2s) dolomite. The seismic peak acceleration is less than 0.05g, and the characteristic period of the seismic response spectrum is 0.35s.

Topic: Special construction scheme for tunnel excavation Revised special construction scheme Modify special construction scheme
Special construction of girder tunnel programme (Revised)
The left tunnel of Daliang Tunnel starts at ZK50+895~ZK52+714 and ends at ZK50+895~ZK52+714, with a total length of 1819m. The design elevation of the starting point is 1023m, the design elevation of the ending point is 1039m, and the maximum burial depth of the tunnel floor is 144m. The right tunnel starts at YK50+505~YK+52+606, with a total length of 2101m. It is a long tunnel, with a design elevation of the starting point of 1016m and the design elevation of the ending point of 1040m. The longitudinal slope of the road surface in the tunnel of this section is 1% of the uphill slope, and the transverse slope of the road surface is 2%. The bid section includes the main tunnel portal, tunnel excavation, support, lining, and related ancillary works: three pedestrian cross tunnels with a total length of 377.2m, two vehicle cross tunnels with a total length of 241.2m, one power distribution tunnel, and four emergency parking strips.

Topic: Special construction scheme for girder tunnel Revised special construction scheme Modify special construction scheme
Special construction of tunnel excavation programme
Jinshan Tunnel belongs to hilly landform with large topographic relief. The natural slope gradient at the entrance and exit is about 23~33 °. The surrounding rock of the tunnel body is tuff lava of Jurassic Nanyuan Formation, which belongs to hard rock. The rock mass is generally relatively complete, which is favorable to the stability of the surrounding rock of the tunnel body. The stability of the surrounding rock of the tunnel portal is poor, so support and detection measures should be strengthened during excavation

Topic: Special construction scheme for tunnel excavation Blasting construction scheme of tunnel body Construction Scheme of Railway Tunnel Body
Special construction of highway tunnel penetration programme
Tuliling Tunnel of the Phase I Highway Reconstruction Project of Heishidu Daoshichong Section of Provincial Highway 318 is a single hole two-way road tunnel. The highway class is Class II highway. The mileage of the tunnel is K33+725 ～ K35+863, and it is 2138m long. It is located on a curve without superelevation. The radius of the circular curve is 600m and 1000m respectively. Double sided slopes are used. The longitudinal surface of the tunnel is two-way slopes. The portal adopts the end wall portal, the main tunnel adopts the form of three center circle section, and the emergency parking area adopts the inner contour of five center circle. Clear width: 9m, clear height: 5m. Design speed: 40km/h. The construction period is 14 months, starting on August 6, 2016 and completing on October 6, 2017.

Topic: Special construction scheme for tunnel penetration Metro tunnel through construction scheme library Special construction scheme for highway tunnel end wall
Special construction of tunnel invert and secondary lining programme
The length and form of the tunnel, and the main surrounding rock grade. The vehicle crosswalk and pedestrian crosswalk are arranged. Tunnel construction clearance, height of construction clearance. Tunnel construction clearance of emergency parking area, height of construction clearance. Construction clearance of crosswalk. Clearance of pedestrian crossing tunnel.

Topic: Special construction scheme for tunnel second lining Construction Scheme of Tunnel Secondary Lining Plug Formwork Construction Scheme for Positioning Reinforcement of Tunnel Secondary Lining
Special tunnel construction programme Temporary construction section III
Section TJ03 of Lin'an Jiande Section of Linjin Expressway is located in Lin'an District and Tonglu County, Hangzhou. The starting stake number is K36+400. Tianmuxi Bridge is set to cross Tianmuxi River and provincial highway S208, and a long tunnel is set to cross Baowu, then Wucun Bridge and Wujiawu Tunnel are set to cross the valley, and then the Fenshui River Bridge is set to cross the Fenshui River, and then Fenghuang Mountain and Zhongtai Mountain tunnels are set to the end of the stake number K49+600， The total length of the route is 13.200km.

Topic: Special construction scheme for temporary buildings Temporary construction scheme of tunnel Temporary construction scheme for tunnel entrance
Tunnel bench method plus temporary inverted arch _ special construction of temporary cross bracing method programme 1685m in total
The starting and ending mileage of hand climbing rock tunnel is DK128+160 ～ D2K129+845, with a total length of 1685m. It is a double track tunnel, and D2K129+036.030 ～ D2K129+845 is located on the right deviation curve of R-9000. The tunnel is constructed from both ends. The entrance is constructed on the reverse slope and the exit is constructed along the slope. Composite lining is adopted for tunnel lining. Shotcrete anchor support is used for initial support, wet shotcrete process is used for shotcrete, bench method is used for excavation of Class III and IV surrounding rock, and bench method plus temporary inverted arch/temporary cross bracing method is used for construction of Class V surrounding rock. The principle of "combining prevention, drainage, interception and blocking, adjusting measures to local conditions and comprehensive treatment" shall be adopted for tunnel waterproof and drainage, and the first level waterproof standard shall be reached. The tunnel is equipped with fixed lighting and emergency lighting equipment.

Topic: Construction Scheme for Temporary Transverse Bracing of Tunnel Special construction scheme for tunnel entry Special construction scheme for multi arch tunnel entry
Tunnel entry construction of a subway section in Beijing programme
The line between a subway station and a central station is located in the north of XXX Road - the intersection of the central axis. It is arranged along the Yongzhong by west of the central axis road, in a north-south direction. The section from a subway station to a central station includes two main line sections from a subway station to a central station and some sections of the connecting line between XXX line and XXX branch line. In the middle of the section is the open cut section, and the sections other than the open cut section are the concealed section. From the open cut section to the concealed section, there are six tunnel entry sections (including two A1 sections, one A2 section, and three L1 sections). The concealed excavation section of the section is in four cross section forms, including horseshoe shaped and multi circle combined type. The composite lining is mainly constructed by bench method. Both A2 and L1 sections are provided with middle partition, and the civil air defense section is constructed by CRD method. The foundation pit retaining pile+shotcrete net wall of the open excavation section shall be broken for the underground excavation of the section.

Topic: Construction scheme for tunnel entrance Waterproof construction scheme of section tunnel Construction scheme of metro section tunnel
Construction of 4314m long tunnel of expressway programme
The highway xx section (K198+100~K209+200 line with a total length of 11.25 km) of the expressway from xx to xx was constructed by China Railway xx Group Second Engineering Co., Ltd., with xx interchange ramp, xx service area, 4.16 km subgrade, 4.91 km bridge, and 1/2 2.18 km tunnels. The bridge crosses G317 National Highway for many times. Xx Tunnel is a mountain side tunnel, located in the mountain on the left bank of xx River. The rock stratum trend intersects the tunnel axis at a large angle. The tunnel entrance is located on the left slope of xx gully mouth, with a natural slope of about 40 degrees. The upper part is mainly composed of colluvial gravelly soil, and the lower part is composed of developed pebble soil. The overburden layer is thick, and the slope surface vegetation is developed, The left line of xx tunnel is 4314m long and the right line is 4268m long. The entrance section is connected by xx to the left line ZK207+017~ZK209+200 (2183m), and the right line YK207+035~YK209+200 (2165m). The exit section is completed by C22 bid. The abutting stake number K209+200. The surrounding rock at the entrance of xx tunnel is V1 and V2. Left tunnel inlet (ZK207+017~ZK207+150); The length of this section is 133m, and the buried depth is 0-95m. The surrounding rock of the tunnel at the entrance section is composed of gravelly soil, gravelly silty clay, alluvial proluvial pebble soil, and strongly weathered, strongly unloaded metasandstone and slate in the Quaternary colluvial deposit; Right tunnel inlet (YK207+035~YK207+150); The length of this section is 115m, and the buried depth is 0~95m. The surrounding rock of the tunnel at the entrance section is composed of gravelly soil, gravelly silty clay, alluvial proluvial pebble soil, strongly weathered and strongly unloaded metasandstone, slate and phyllite in the Quaternary colluvium and diluvium.

Topic: Construction Scheme for Tunnel Entry of Expressway Code for highway tunnels Standard for highway tunnels
Tunnel entry construction of a section of expressway programme
The whole line of XX contract section of XXXX-XX Expressway is located in XX and XX County, starting at XX Village, XX Town, XX County, connecting with the terminal point of XX contract section XX44+913.412 of the project, passing through XX Town and XX Township, and ending at XXXX69+900 of XX Township. The total length of the line is 24.987XXm, which is a four lane expressway with a design speed of 100XXm. Including XX interchange and XX service area.

Topic: Construction Scheme for Tunnel Entry of Expressway Code for highway tunnels Standard for highway tunnels
Special construction of tunnel excavation and support programme
Send you an engineering data. It will be of great help to engineers and technicians.

Topic: Special construction scheme for tunnel excavation and support Special construction scheme for shotcrete anchor support Special construction scheme for foundation pit support
Special safety construction for tunnel excavation programme (China Railway)
The tunnel works in this bid section will be constructed in an information-based way. Advanced geological prediction and monitoring measurement technology will be used to obtain the surrounding rock state parameters, optimize the construction scheme, and implement dynamic management 1) The tunnel of this line is constructed by concealed excavation method, and the construction is organized according to the principle of the New Austrian Tunneling Method, and the corresponding construction method is selected according to the surrounding rock level and surrounding environment. 2) The tunnel construction shall be carried out in accordance with the approved design documents, and the geological prediction, prediction and monitoring measurement plan shall be formulated according to the hydrogeological conditions and incorporated into the construction process. During construction, dynamic management shall be implemented according to geological prediction, prediction and monitoring measurement information. 3) Smooth blasting or presplitting blasting shall be adopted for tunnel excavation, and over excavation and under excavation shall be strictly controlled.

Topic: China Railway Special Construction Scheme China Railway Safety Construction Scheme Special safety construction scheme for tunnel
[Gansu] Special construction of tunnel with unfavorable geology programme _
1. XX Tunnel is a four lane expressway tunnel with left and right lines separated, located in the east of XX Village, XX Township, XX County, XX Province. The starting and ending stake number of the left line of the tunnel is ZK+130-ZK4+725, with a total length of 595m, which belongs to a medium stone tunnel. The starting and ending stake number of the right line is YK4+512-YK5+740, with a total length of 1228m, belonging to a long stone tunnel. Longitudinal slope of left line - 2.8%; - 2.6% for the right line. The entrance and exit are all end wall portal. The tunnel in this contract section covers the right line YK5+120-YK5+740 with a length of 620m, the left line ZK4+400-ZK4+725 with a length of 325m, and the total length of the left and right lines is 945m.

Topic: Special construction scheme for tunnel with unfavorable geology Construction measures for tunnel with unfavorable geology Construction Technology of Tunnel in Unfavorable Geology
Special safety construction of Ejingguan Tunnel programme
The Ejingguan Tunnel is a long separated two hole one-way two lane tunnel. The left track is 1910m long and the right track is 1915m long. The starting and ending mileage of the left track is SZK+181.46 ～ SZK2+091.46, and the starting and ending mileage of the right track is SZK+183 ～ SZK2+098. The entrance portal of Ejingguan Tunnel is designed as an end wall portal structure, and the exit portal is designed as a bamboo cutting portal structure. There are 4 pedestrian cross passages, 3 vehicle cross passages and 3 pairs of emergency parking strips in the whole tunnel.

Topic: Special safety construction scheme for tunnel How to prepare special construction scheme for tunnel Tunnel special construction scheme (demonstration)
Special safety construction of tunnel portal and open cut tunnel programme
1. The structural form of watershed tunnel is single hole two-way driving, with a clearance of 5.0m and a clear width of 9.5m. The tunnel starts and ends at K20+902 ～ K21+352, with a total length of 450m. The Class III surrounding rock is 127m, the Class IV surrounding rock is 258m, the Class V surrounding rock is 55m, and the open cut tunnel is 10m. 2. The structural form of Liangchahe tunnel is single hole two-way driving, with a clearance of 5.0m and a clear width of 9.5m. The starting and ending pile numbers are K40+580 ～ K41+045, The total length is 465m, with 292m of Grade III surrounding rock, 141m of Grade IV surrounding rock, 22m of Grade V surrounding rock, and 10m of open cut tunnel.

Topic: Special construction scheme for safety of open cut tunnel Construction scheme of tunnel opening works Tunnel portal construction scheme
Special construction of Jinfeng tunnel excavation programme
This section is the MZTJ-4 contract section of Phase I civil works of Yicheng Baokang section of Hubei Mazhu Expressway. The starting and ending mileage of the line is K90+302~K99+900, with a total length of 9.598km. Jinfeng Tunnel is a separate tunnel, with the left tunnel ZK98+678~K101+045, 2367m long, and the right tunnel YK98+650~YK101+013, 2363m long. It is a long tunnel, with the maximum burial depth of the left tunnel about 264.8m, Among them, Class III surrounding rock is 1090m, Class IV surrounding rock is 750m, and Class V surrounding rock is 441m; The maximum burial depth of the right tunnel is about 254.2m, including 1090m for Grade III surrounding rock, 750m for Grade IV surrounding rock, and 431m for Grade V. Jinfeng Tunnel is provided with 7 pedestrian cross passages, all of which are orthogonal to the main tunnel. The length of 1 # cross tunnel is 35 m, and the surrounding rock is classified as Grade III; The length of 2 # transverse tunnel is 35 m, and the surrounding rock is classified as Grade III; The length of 3 # transverse tunnel is 35 m, and the surrounding rock is classified as Grade III; The length of 4 # transverse tunnel is 35 m, and the surrounding rock is classified as Grade III; The length of 5 # cross tunnel is 35 m, and the surrounding rock is classified as Grade IV; 6 # transverse tunnel is 35 m long, and the surrounding rock is classified as Grade V; The length of 7 # transverse tunnel is 35 m, and the surrounding rock is classified as Grade IV; A 6m open tunnel is set at the entrance of the left line, no open tunnel is set at the exit of the left line, a 6m open tunnel is set at the entrance of the right line, and a 6m open tunnel is set at the exit of the right line. The entrance and exit portal shall be end wall type, and the single hole clearance (width x height): 10.5X5.0m.

Topic: Special construction scheme for tunnel excavation Blasting construction scheme of tunnel body Construction Scheme of Railway Tunnel Body
Special construction of Banbian Street gas tunnel programme
Banbianjie Tunnel is located in Taiping Township, Renhe District, Panzhihua. The tunnel is a separate long tunnel. The left track stake number is ZK35+575 ～ ZK37+407, with a total length of 1832m, including 522m of Grade V surrounding rock and 1310m of Grade IV surrounding rock. The right track stake number is K35+615 ～ K37+430, with a total length of 1815m, including 585m of Grade V surrounding rock and 1230m of Grade IV. The portal at the ash pit end is end wall type, and the portal at the half street end is single compression type, with a maximum burial depth of 556.5m. The left and right lines of the tunnel are located on the curve, with the radius of R=1300m, 3500m, and the longitudinal slope of -2.742% (the downward slope from Huiwo to Banbian Street is negative). The left and right lines at the inlet end are on a straight line, and the left and right lines at the outlet end are on a curve (R=3500m). The maximum distance between the left and right tracks of the tunnel is 30m, and the minimum distance is 20m. The tunnel is provided with two cross passages for vehicles (the stakes of the right track are LK36+220, LK36+825, and the stakes of the left track are LZK36+213.967, LZK36+833.137), three cross passages for pedestrians (the stakes of the right track are LK35+915, LK36+515, LK37+115, and the stakes of the left track are: LZK35+906.623、LZK36+516.015、LZK37+124.198)。

Topic: Special construction scheme for gas tunnel Code for gas tunnel Safety construction scheme for tunnel gas detection
Special construction of karst geology for multipurpose tunnel programme
The starting and ending mileage of the utility tunnel is DK36+898.000 ～ DK39+054.000, the tunnel line spacing is 4.6m, and the total length is 2156m. The boundary mileage of the tunnel line is DK36+898 and DK39+054. The entrance to DK37+500 is designed to be 25 ‰ downhill, and the exit to DK37+500 is designed to be 10 ‰ downhill. The whole tunnel is located on the right curve of R=3500m, and the rest of the sections are located on a straight line. The entrance of the tunnel is connected to the subgrade works, and the exit is connected to the subgrade works. The maximum burial depth is about 130m. The tunnel body passes through the section of lava stratum, and karst is strongly developed.

Topic: Tunnel construction scheme under karst geology Special construction scheme for karst tunnel Special construction scheme for tunnel karst
Special construction for collapse prevention of Aiba Tunnel programme
Aiba Tunnel is designed as a separate long tunnel. The left tunnel starts and ends at ZK22+280-ZK23+485, 1205m long, and the maximum buried depth is about 142m. The right tunnel starts and ends at YK22+280 ～ YK23+482, 1202m long, and the maximum buried depth is about 139m. The tunnel is located in Heping Town, Yanhe County. The landform type is erosion stripped silty mudstone, and the design surrounding rock level is IV The entrance and exit portal shall be end wall portal. Among them, the left width of Grade V surrounding rock at the entrance and exit section is 290m, and the right width is 262m; the left width of Grade IV surrounding rock at the tunnel body section is 900m, and the right width is 930m. The open cut method is used for construction of open cut tunnels, and the NATM method is used for construction of concealed tunnels, which are mainly constructed by circular excavation and reserved core soil method and bench method. Composite lining structure is adopted for lining design. The entrance section of the tunnel is located on a curve and the exit section is located on a straight line; The left tunnel is uphill, the right tunnel entrance and tunnel body section are uphill, and the exit section is downhill. The tunnel is provided with 1 emergency stop, 1 cross passage for vehicles and 2 cross passages for pedestrians.

Topic: Special construction scheme for tunnel collapse prevention Special construction scheme for collapse prevention of external scaffold Waterproof and drainage construction scheme of tunnel
Special construction of Aiba tunnel lining programme
This construction scheme focuses on "detailed description, easy understanding, easy acceptance, safety and quality assurance", and is prepared in accordance with the guiding ideology of "feasible construction scheme, advanced construction technology, reasonable construction organization, appropriate measures and strong guarantee" and the following principles.

Topic: Special construction scheme for tunnel lining General tunnel lining construction scheme Construction scheme for general tunnel excavation
Special safety construction of tunnel excavation and support programme
Huiyaozi Tunnel is located near Huiyaozi Village, Jianchang County, and extends in the northeast direction. It is two separate one-way curve tunnels, with the left line of 1000m long and the right line of 1005m long. It is a long tunnel. The specific stake numbers are located in ZK3+020 ～ K4+020 (left line) and K2+985 ～ K3+990 (right line). The longitudinal sections of the openings at both ends of the left and right lines of the tunnel are located on convex vertical curves, and the middle sections are located on straight sections; The longitudinal slope of the straight slope section of the left line tunnel body is -2.05%, and the longitudinal slope of the straight slope section of the right line tunnel body is -2.06%. The maximum buried depth of the tunnel is about 112m.

Topic: Special construction scheme for excavation and support safety Tunnel excavation and support construction scheme Tunnel support and excavation construction scheme
Special construction of Xinlian tunnel excavation project programme
Xinlian Tunnel is the longest tunnel on the line, which is the key project and control project of the bid section. The tunnel is located between Yangzong and Kunming. The terrain fluctuates greatly. The ground elevation is 1790~2300m, the relative height difference is 530m, the natural slope is 15~35 °, and the vegetation is developed locally. The tunnel entrance mileage is D2K720+765, the exit mileage is D2K733+695, the total length is 12930m, the maximum burial depth is about 470m, the tunnel exit section is shallow, the minimum burial depth of the vault is about 5m, which is a shallow burial section.

Topic: Special construction scheme for tunnel excavation works Construction Scheme of Tunnel with Shotcrete Anchor and Concealed Excavation Method Construction Scheme of Tunnel Excavated by Tunnel Boring Machine
Special waterproof and drainage construction of Qiling Tunnel programme
The new Qiling Tunnel of Ganzhou Shenzhen Railway is located in Xiaojinkou Street, Huizhou City, Guangdong Province. The tunnel entrance and exit mileage is respectively DK354+520 ～ DK354+846, with a total length of 326m. The boundary mileage of light and dark tunnels is respectively DK354+576 and DK354+811. The entrance and exit of the tunnel are hat brim oblique cut portal (entrance L=18m, exit L=18m). Bias pressure cutting type open cut tunnel is adopted for the inlet and outlet. (2) The plane and vertical sections of the tunnel from the tunnel entrance DK354+520 to the exit DK354+846 are located on the left deflection curve. The one-way uphill gradient of the tunnel is 7.1236 ‰.

Topic: Special construction scheme for tunnel waterproof and drainage Special technical disclosure of tunnel waterproof and drainage Special construction scheme for typhoon prevention
Special temporary construction of Bifengsi tunnel portal programme
Bifengsi Tunnel starts and ends at DK051+761 ～ DK060+195.27. The total length of the tunnel is 8434.27km, the maximum burial depth of the tunnel is about 232m, and the minimum burial depth of the tunnel body is about 28m. The road is connected and the traffic is convenient. The entrance section of Bifengsi Tunnel is located in Shuangdun Village, Yuxi Town, Fuqing City, Fujian Province. The starting and ending mileage of the pipe section in the entrance work area is DK051+761 ～ DK053+380, with a total length of 1619 meters, a preparation period of 2 months, a main tunnel construction period of 21 months, and a total construction period of 23 months. Temporary works include: 1 frame work team station, 1 through service road, 1 transformer for the pipeline, and the material storage room and the first frame work team station of the tunnel are built together.

Topic: Temporary construction scheme for tunnel portal Special construction scheme for temporary buildings Special construction scheme for safety of tunnel portal works
Special construction of Guangshan Tunnel programme -- Latest
The starting and ending stakes of Lot 4 of Jin Hong Expressway are K30+700-K49+540, of which the starting stake of the left line of Guangshan Tunnel 4 is ZK28+662, the ending stake is ZK33+145, and the length is 4483m. The starting stake of the right line is ZK28+642.94, the ending stake is ZK33+105, and the length is 4462.06m. It is a two hole three lane separated tunnel. Our construction includes K30+700-K33+145 section. The left line is 2445m long and the right line is 2405m long. The entrance (tunnel exit) is located in Chunhe Town, Yuxi City. The longitudinal slope of the section where the tunnel is located is -1.400%, and the maximum burial depth of the tunnel is about 158m.

Topic: The latest special construction scheme of high-speed tunnel Latest special construction scheme for formwork Template of the latest special construction scheme
Laodingshan Tunnel - monitoring measurement - special construction programme
Laodingshan Tunnel is located from Shanmen Village to Xiaoluo Village in the suburb of Changzhi City, Shanxi Province. The tunnel entrance is located in Laodingshan Shanmen Village in the suburb of Changzhi City, Shanxi Province. The terrain is flat, with the entrance mileage of DK214+030. The tunnel exit is located in Xiaoluo Village, the suburb of Changzhi City, Shanxi Province. The terrain is flat, with the exit mileage of DK217+471 and the gap mileage of DK217+471.54. The total length of the tunnel is 3441m, the maximum burial depth is 85m, and it is located in DK215+450 ～ DK215+620 The ground elevation is 1060m. The traffic at the entrance and exit mileage of the tunnel is convenient. The tunnel passes through Shanmen Village, Erlongshan Village, Jijiazhuang Village and Xiaoluo Village. The tunnel entrance is shallowly buried, and the tunnel body passes through new loess and old loess. The new loess is yellowish brown, slightly dense, upright, macroporous and collapsible. Old loess, brown yellow, hard hard plastic, containing gravelly soil, coarse round gravel and ginger stone. The engineering geological conditions are general, and the overlying soil layer is thin.

Topic: Special construction scheme for tunnel monitoring and measurement Construction Scheme of Tunnel Monitoring Center Tunnel monitoring lighting construction scheme
Special blasting safety construction of multi arch tunnel programme
The Sanmenwan Bridge and Link Expressway Project in Zhejiang Province starts from Xiangshangang Bridge, starting at K46+912.043 and ending at K101+405.299, connecting Taizhou Bay Bridge in Zhejiang Province, with a total length of 54.493km. This bid section is a bid section, starting at K62+330 and ending at K67+700, with a total length of 5.37km. There are two tunnels in the bid section: Laochashan Tunnel and Daaoling Tunnel. Laomaoshan Tunnel K63+480-K63+698 is a two-way four lane tunnel with a length of 218m and a tunnel excavation of 56797m?; Daaoling Tunnel K66+098-K66+335 is a two-way six lane tunnel with a length of 237m and a tunnel excavation of 79660m?. The total tunnel blasting volume is 136457m?.

Topic: Special safety construction scheme for tunnel blasting Special Construction Contract for Tunnel Blasting Blasting construction scheme of tunnel body
Special construction of tunnel excavation programme
Xinwu Tunnel passes through structural denuded hills. The starting and ending mileage of the left line tunnel is ZK83+926 ～ ZK86+427, with a length of 2501m. The portal at the inlet end is of bamboo cutting type, with a design elevation of 354.471. The portal at the outlet end is of bamboo cutting type, with a design elevation of 296.948m, a slope of - 2.3%, and a maximum burial depth of 226.3m. The starting and ending mileage of the right line tunnel is K83+938 ～ K86+390, with a length of 2452m, The portal at the inlet end adopts the bamboo cutting type, and the design elevation of the portal is 354.196m. The portal at the outlet end adopts the bamboo cutting type. The design elevation of the portal is 297.8m, the gradient is - 2.3%, and the maximum buried depth of the tunnel is about 218.4m.

Topic: Special construction scheme for tunnel Special construction scheme for tunnel passing through unfavorable geology
Special construction of tunnel secondary lining programme
This contract is the XXXXXXXXXXXXXXXXXXXXXXXXXX contract section, with a total length of 7.113 km. XX tunnel is a separate tunnel. The starting and ending stakes of the right line are K64+252 ～ K67+162, with a total length of 2910 m, including 1670 m of Grade III surrounding rock, 930 m of Grade IV surrounding rock, and 310 m of Grade V surrounding rock. The starting and ending stakes of the left line are ZK64+248.9 ～ ZK67+194, with a total length of 2945.1 m, including 1670 m of Grade III surrounding rock, 950 m of Grade IV surrounding rock, and 325.1 m of Grade V. The portal is end wall type. The project area belongs to the continental monsoon climate of sub humid middle temperate zone, with four distinct seasons. The rain and heat are in the same season. The monsoon is significant, and the water flow is greatly affected by the seasons. The annual evaporation in this area is 1838.7mm, the annual average sunshine is 2800-2900h, and the frost free period is 150d. The meteorological conditions cause the short effective construction period every year.

Topic: Special construction scheme for tunnel secondary lining Special construction scheme for secondary structure Construction Scheme of Tunnel Secondary Works
Caiguanying Tunnel Special Construction programme --Latest
Jinning Hongta District Expressway is an important part of the infrastructure construction of Kunming and Yuxi. The implementation of the project makes the road networks of Kunming and Yuxi more perfect. It is one of the important regional road networks of the two cities, an important part of Yuxi Ring Expressway, and an important section of Kunming Moxi Expressway. The starting point of the expressway route is K0+000, located in Lihe Village, southwest of Jinning County, Kunming City, and connected to the southwest section of Kunming Ring Expressway (Anjin Expressway); The end point of the route (K49+540) is located in Feijing Village, Yuxi City. The main line is constructed according to the two-way six lane standard, with the design speed of 100Km/h and the subgrade width of 33.5m; the interchange connecting line is constructed according to the standard of Class I highway, with the design speed of 60km/h and the subgrade width of 23.0m; the design load of bridges and culverts is Class I highway, and other technical indicators are in line with the specified values in the Technical Standards for Highway Engineering (JTGB01-2003) issued by the Ministry.

Topic: The latest special construction scheme of high-speed tunnel Latest special construction scheme for formwork Template of the latest special construction scheme
Special construction of tunnel initial support programme
This contract is the XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX contract section, with a total length of 7.113 km. XX tunnel is a separate tunnel. The starting and ending stakes of the right line are K64+252 ～ K67+162, with a total length of 2910 m, including 1670 m of Grade III surrounding rock, 930 m of Grade IV surrounding rock, and 310 m of Grade V surrounding rock. The starting and ending stakes of the left line are ZK64+248.9 ～ ZK67+194, with a total length of 2945.1 m, including 1670 m of Grade III surrounding rock, 950 m of Grade IV surrounding rock, and 325.1 m of Grade V. The portal is end wall type. The project area belongs to the continental monsoon climate of sub humid middle temperate zone, with four distinct seasons. The rain and heat are in the same season. The monsoon is significant, and the water flow is greatly affected by the seasons. The annual evaporation in this area is 1838.7mm, the annual average sunshine is 2800-2900h, and the frost free period is 150d. The meteorological conditions cause the short effective construction period every year.

Topic: Special construction scheme for tunnel initial support Summary of tunnel initial support construction Special construction scheme for shotcrete anchor support
Guizhou Weiyanshan Tunnel Special Construction programme
Weiyanshan Tunnel is a separate super long tunnel. The left tunnel starts and ends at ZK59+840 ～ ZK62+950, with a length of 3110m and a maximum buried depth of 333m. The right tunnel starts and ends at YK59+830 ～ YK63+020, with a length of 3190 and a maximum buried depth of about 330m. The tunnel is located in the 9th and 10th contract sections. Both the left and right tunnels are bounded by K61+835. The left tunnel located in the 9th contract section starts and ends at ZK59+840 ～ ZK61+835, 1995m long,

Topic: Special Construction Scheme for Weiyanshan Tunnel Construction Scheme for Integral Track Bed of Yanshan Tunnel Construction Scheme for Tunnel Entry Guizhou
[Shaanxi] Special construction of tunnel blasting design programme

Project overview: The ZK116+045 ～ ZK120+110 and YK116+050 ～ YK120+125 sections of the highway crossing the mountain are curved super long tunnels with bamboo cutting openings. The spacing between the left and right tunnels is 40 ～ 55 meters, and the overall axis direction is about 349 °. The left line of the tunnel cavern is 4065m long, the right line is 4075m long, the maximum burial depth of the left line is about 245m, and the maximum burial depth of the right line is about 239m. The tunnel adopts composite lining. Mechanical ventilation, combined lamp lighting. The left line tunnel in the bid section is 2035m long, and the right line tunnel is 2030m long.

Topic: Tunnel blasting drawing Blasting design Blasting construction