A Construction Technology of Main Bridge of Double-tower and Single-cable Plane Low-tower Cable-Stayed Bridge

Abstract

The invention relates to a construction technique for the main bridge of a low-tower cable-stayed bridge with two towers and a single cable plane. The main bridge includes two main piers and two transition piers. According to the single-hole two-way navigation arrangement, the main beam adopts the longitudinal, horizontal and vertical three-dimensional prestressing system, and is designed according to the full prestressed concrete component. The sequence of the main beam construction process is: first, the No. 0 and No. 1 beam sections are constructed at the same time , the No. 0 beam section is connected with the main pier by the tower beam consolidation system, and then the No. 2 to No. 20 beam sections on the side span side and the main span side are cantilever symmetrically poured. At the same time, the cable tower is constructed and the supporting facilities for the cables are installed. Synchronous cantilever casting The girder body and stay cables are installed with a delay of two sections, timely constructing the No. 22 beam section on the transition pier, then constructing the side-span closing section and the mid-span closing section, and finally constructing ancillary facilities to complete the main bridge construction; the steps of the present invention The design is reasonable, the construction period is short, the construction is safe and reliable, and the quality is high.

Description

technical field [0001] The invention relates to a construction technique of a main bridge of a cable-stayed bridge with two towers and a single cable plane and a low tower. Background technique [0002] The Pumen Bridge is located about 1km south of the Langshui Village Committee of Pumen Town. The bridge crosses the Hejiang River. It is a 90+165+90m single-cable plane double-tower prestressed concrete low-tower cable-stayed bridge. The low-tower cable-stayed bridge has two main piers and two transitional piers. The main piers use double-leg thin-walled piers and round-end caps , The pile foundation is a 2.2m bored pile. The width of the bridge is 31.0m, the girder height is 3.2m~6.2m, the main tower is a solid cuboid tower with a pagoda-shaped decorative structure on the top of the tower, and the height of the tower is 23.0m. The stay cables are single-cable planes, arranged in a fan shape, and arranged on the central divider in the transverse bridge direction. The stay ...

AI Technical Summary

Problems solved by technology

Difficulty in spatial positioning of stay cables, main girder cable conduits and stay cable anchorage points during construction

[0007] The bridge deck of Pumen Bridge is wide, self-heavy, and difficult to construct. The distribution of steel bars and prestressed pipes is dense, and the structure is complex, making construction difficult.

[0008] During the construction process of the main bridge, the engineering technology is complex, there are many technical difficulties, and the whole process of high-altitude operations above the water makes quality and safety management difficult

Images