Construction scheme of cast-in-place beam support for z interchange

Uploaded on: 2020-09-14 10:43:49 come from: Water supply and drainage / Water supply and drainage construction design / construction plan

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The main line of xx Road Interchange in this bid section is 462m long, with a total of four connected 22 spans. The span combination is (17.5m+5 × 22m+17.5m)+(17.5m+2 × 22m+25m+19m)+(2 × 19m+22m+25m+17.5m)+(17.5m+3 × 22m+17.5m); The bridge width is 22.5m~43.16m, and the bridge shape is single box with multiple chambers. The standard beam shape of the bridge is single box with three chambers. The flange plate is 2.5m wide, and the beam body is 1.4m high. The beam body is a partially prestressed Class A member, which is provided with a reinforced concrete anti-collision barrier and a handrail. The shallow embedded Em-80 expansion joint is used for the expansion joint. The bridge deck is paved with steel fiber waterproof concrete and asphalt pavement. According to the existing ground elevation and bridge design elevation, the amount of main line bridge support is about 70000 cubic meters. The second S9~S10 of the main line bridge spans the existing xx line railway, and it is necessary to reserve the clearance channel of xx railway single line by using φ 400mm steel pipe overhead (Bailey frame). The construction period of this project is short, and the contract period is 8 months. Due to the influence of underground pipelines and high-voltage wires at the construction site, the construction period has been delayed by about one and a half months. In order to ensure the contract period, our department plans to input four sets of formwork and support materials at one time.

Construction Scheme for Cast in situ Beam Support of z Interchange - Figure 1

Construction Scheme for Cast in situ Beam Support of z Interchange - Figure 2

Construction Scheme for Cast in situ Beam Support of z Interchange - Figure 3

Z Construction scheme for cast-in-place beam support of interchange - Figure 4

Z Construction scheme for cast-in-place beam support of interchange - Figure 5

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Topic: Construction Scheme of Interchange Project Small radius construction technology of tunnel shield Code for Fire Protection Design of Buildings
River crossing Flyover Construction scheme of steel-concrete composite beam
When the NH and WH main lines cross the existing XX River, due to the influence of the old bridge, it is not suitable to set supports during construction. Therefore, the bridge adopts three span equal height prestressed composite beam with span combination of 35m+58m+40m, of which 40+16m on the small stake side and 35+12m on the large stake side are concrete box beams, and 30m in the middle is steel concrete composite beams. The beam height of the concrete beam section is 2.5m, the center height of the 2 # composite beam is 2.5m, and the height of the steel box of the 1 # and 3 # composite beams is adjusted according to the cross slope of the bridge deck. According to the change of bridge deck width, the concrete main beam adopts the sections of single box with two chambers, single box with three chambers, single box with four chambers, and single box with five chambers. The cantilever length of the main beam is 2.13 meters, the top plate of the box chamber is 0.25 meters thick, the bottom plate is 0.2 meters thick, and the web plate is 0.5 meters thick. The steel-concrete composite beam adopts a single box three chamber section, and the width of a single box chamber is 3m. The width of the bridge deck between boxes is adjusted to adapt to the change of the bridge deck width. The concrete bridge deck at the web of the steel box section is 0.416m thick, the concrete bridge deck inside the box chamber and between the boxes is 0.25m thick, and the steel plate at the upper flange of the steel box is 0.6m wide and 2.5cm thick. The web is 1.6 cm thick and the bottom plate is 2 cm thick. The bridge deck of concrete main beam and composite beam shall be cast-in-situ with C50 concrete, and the steel box girder shall be prefabricated in Q345qc factory.

Topic: Construction Scheme of Flyover Bridge Construction Contract of Flyover Special safety construction scheme for overpass
[Chongqing] Flyover Page 123 of the project supervision outline (details of interchange) _secret
This project is an important node project for the intersection of the "three vertical lines" in the planning of the expressway network in the main urban area and the inner ring expressway. The three vertical lines start from the Yujiawan Flyover in the north, pass Shima River, Hongyancun Bridge, Hougong, Chenjiaping, Tuojiaao, Qiezixi, Yudong Yangtze River Bridge in the south, and end at Yudong, passing Yubei District, Jiangbei District, Yuzhong District, High tech District, Jiulongpo District There are seven districts in Dadukou District and Banan District, and the design driving speed of the road is 60Km/h; The upper boundary section of the inner ring expressway starts from the Shangqiao Interchange of Chengdu Chongqing Expressway, passes through Zhangjiawan and Huayan along the Shangqiao Bridge, crosses the Yangtze River at Masangxi (Masangxi Yangtze River Bridge), enters the east bank of the Yangtze River, passes through Piboyan, Zoumayang and Dashan Village, and ends at the Jieshi Interchange of Chongqing Guizhou Expressway.

Topic: Special construction scheme for interchange Fire protection design of overpass Construction Contract of Flyover
Construction Scheme for Cast in situ Box Girder of Jinwan Interchange Project
Jinwan Interchange is located in Hongqi Town, Zhuhai City. It is the intersection of provincial highway S366 and provincial highway S272. The provincial highway Zhuhai Avenue starts at Jiuzhou Port and ends at Gaolan Port. The total length of the route is 50.4 kilometers. It is an important traffic trunk road connecting the central urban area of Zhuhai and the western region. The crossed road S272 is a Class I highway, which is the only road connecting the airport at present.

Topic: Construction scheme for cast-in-place concrete of bridge box girder Special construction scheme for interchange project Construction scheme of interchange project
Organization scheme of interchange engineering
The project has the following characteristics: A. The bridge is an urban bridge, with aesthetic requirements; B The geological conditions are complex, and the local area belongs to karst landform area, with more underground karst and abundant underground water; C、 The prestressed design of this bridge has many types and is relatively complex; D、 The construction procedures of the single column large cantilever pier and the simply supported box girder of the approach bridge cross frequently; E、 The construction procedures of arch rib, beam and suspender of the main bridge also have certain cross operations; F、 The construction process of the half through arch of the main bridge is complex, and there are many concrete pouring in the air, which makes it difficult to measure and test; G、 The arch crown of the main bridge is more than 30 meters from the ground, and there are many aerial operations, which are difficult for safety and quality management; H、 There is a normal road under the main bridge, which has potential traffic safety hazards.

Topic: Construction Scheme of Interchange Project Construction Scheme of Tunnel Grade Separation Special construction scheme for grade separation
Separated type of a highway in the national expressway network Flyover Safety construction scheme for erection of cast-in-place beam support
K76+689 (east line K76+741) of xx Expressway is a S227 cast-in-place continuous box girder separation overpass on the main line. The starting stake number is K76+589.47 (K76+632.47), and the ending stake number is K76+806.53 (K76+849.53). The total length of the bridge is 217.06 (217.06) meters, and the span arrangement is (40+55+40)+3 × 25m. It is divided into two sections, with an intersection angle of 110 degrees.

Topic: Construction scheme of expressway overpass Construction Scheme of Highway Separated Tunnel Special construction scheme for separated interchange
Bailey beam support cast-in-place box beam construction scheme
The fourth Oujiang Bridge (pedestrian bridge) project in Qingtian County is located between the Taihe Bridge and Tashan Bridge in Hecheng Town, Qingtian County. It starts from the intersection of Xiaochang Road and Linjiang East Road in the north, ends at Jiangnan Avenue in the south, and spans the Oujiang River. From north to south, it can be divided into the north approach bridge, the main bridge across the Oujiang River, the south approach bridge, the connection between the two banks, the push slope and the landscape tower. The proposed bridge has a total length of 503.979m and a width of 10m. The main bridge is a four span continuous box girder with a span of 70m+105m+105m+70m. It mainly includes the construction of auxiliary works such as the north approach bridge, the main bridge across Oujiang River, the south approach bridge, the connection between the two banks, slope pushing and landscape towers, rainwater drainage, functional lighting, and bridge deck pavement and railings. The estimated total investment of the project is about 99.6977 million yuan.

Topic: Special construction scheme for Bailey beam support Current construction scheme of high-speed support Method Statement for Bailey Beam Demolition
Safety construction scheme for erection of cast-in-place beam support
The lower bowl buckle, cross bar joint and diagonal bar joint shall be made of carbon cast steel

Topic: Safe construction scheme for support erection Construction scheme for cast-in-place beam of bridge support Special construction scheme for cast-in-place beam of support