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First, the general situation of the project.
XX Bay Bridge and XX River Bridge, starting station number: K22+, ending station number: K23+, XX Bay Bridge bridge length, 9 30m structural continuous T beam.
The height of the cone slope on the side of XX village is m), the height of the cone slope on the side of the XX temple is, the plane of the bridge is located in the gentle curve, and the longitudinal section is on the downhill section.
XX River Bridge, starting station: K23+, ending station: K24+, bridge length, 12 30m structural continuous T beam.
The height of the cone slope on the side of XX village is, the height of the cone slope on the side of XX temple is, the plane of the bridge is located in the gentle curve and the straight line section respectively, and the longitudinal section is located in the vertical curve.
This bridge project is a highway-I level, the net width of the bridge deck of the XX Bay Bridge is 2 net 11m, and the whole bridge is 2 joint: 5 30 + 4 30;The superstructure adopts prestressed concrete (post-tensioned) T beam, first simply supported and then continuous, and the left half of the substructure 0 abutment adopts rib plate abutment, and the right half of 0 adopts column abutment. 9. The abutment pier adopts the rib plate platform, the bridge pier adopts the column pier, and the pier abutment adopts the pile foundation.
Abutment and 5 piers adopt GYZF4350X77 PTFE slide type rubber bearing, other piers adopt GYZ475X90 plate rubber bearing, 0 and 9 abutments adopt D80 expansion joints. 5. The abutment adopts D160 expansion joint.
The net width of the bridge deck of the XX River Bridge is 2 net 11m, and the whole bridge is 3 joints: 4 30 + 4 30 + 4 30;The superstructure adopts prestressed concrete (post-tensioned) T beam, first simply supported and then continuous, the substructure abutment adopts the rib plate platform, the pier adopts the column pier, and the pier abutment adopts the pile foundation. The abutment and 4 piers adopt GYZF4350X55 PTFE slide plate rubber bearing, the other piers adopt GYZ475X75 plate rubber bearing, and 0 and 12 abutments adopt D80 expansion joints.
and 8 abutments adopt D160 expansion joints.
3. Critical, special and difficult control projects.
1. The construction of the pile foundation of the river channel is carried out first, and then the pile foundation construction at both ends of the bridge abutment is carried out.
2. Both bridges are on a gentle curve and must be accurately positioned.
3. The prefabricated sites of the two bridges are set on the roadbed at the end of the bridge.
4. The pile foundation of the two piers is dense, the position of the pile foundation is close, and during the construction of cast-in-place piles, in order to avoid the impact of the nearby pile concrete strength not reached, the operation can only be staggered.
5. The left half of the 0 abutment of the XX Bay Bridge adopts the rib abutment, and the right half of the 0 apbutment adopts the column abutment. 9 abutment pier using rib platform, pier using column pier, xx bay bridge is a diagonal bridge on the curve, the length of each t beam and the width of the side beam in each span are different, to be strictly controlled.
6. Between the XX Bay Bridge and the Beifeng Shanzhong Bridge, there is not enough site for the T-beam prefabrication yard. Priority must be given to the construction of the pile foundation of the bridge in the North Peak Mountain.
6. Because of the river channel of the XX River Bridge, there are 4 rows of pile foundations in the river with a total of 16 piles. First of all, it is necessary to enter the construction of the cofferdam on the side of XX village. Then carry out the construction of the bamboo cage cofferdam on the side of the XX temple. Strive to complete the underwater pile foundation, columns, and cap beams before next year's floods.
7. The pouring of concrete at the lower part of the two bridges, and the prefabrication period of part of the T beam is in winter, so it is necessary to pay attention to the concrete anti-freezing in winter.
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1. Temporary electricity scheme.
2. Special safety construction plan for excavated piles, enclosure of bored piles with mud pools, etc. 3. Information on special operators.
4. Safety disclosure, training, safety education records of the construction unit, etc. 5. Special safety construction plan for high columns and cover beams.
6. Special safety construction plan for traffic restrictions.
7. Special safety construction plan for full house support.
8. The safety construction plan of beam and plate tensioning.
9. Foundation pit excavation safety construction plan.
10. Safety inspection records.
11. Record and report the regular safety inspection of the construction unit.
12. Safety scheme for beam and plate erection, hoisting, etc.
13. The (B, C) certificate of the safety personnel, project manager, and chief engineer of the construction unit 14. There are other contents, I don't want to type, you check the book.
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