Construction method for fabricated type corrugated steel inclined web combined beam

Abstract

The invention discloses a construction method for a fabricated type corrugated steel inclined web combined beam. The method includes the steps that corrugated steel inclined web boundary beams and corrugated steel straight web middle beams are prefabricated on a prefabrication field; bridge abutment or piers are completed on the construction field, temporary supports are set up, the prefabricated beams are transported to the construction field, and the prefabricated corrugated steel inclined web boundary beams are hoisted to specific positions in a segmented mode; transverse connecting reinforcing steel bars of top plates and bottom plates in every two adjacent prefabricated beams are bound and welded; pouring is conducted on longitudinal wet joints and boundary beam top plate wing edge plates between every two adjacent beams again, the corrugated steel webs in the prefabricated beams are connected through bolt connection or welding, the longitudinal reinforcing steel bars are bound and welded, pouring is conducted on transverse wet joints and beams, and one-span simply supported beams or multi-span continuous beam systems are formed; the supports and formworks are detached when certain strength of concrete is reached, system conversion is completed, and construction ends. According to the construction method, clearance on the two sides of the bottom of a box girder can be effectively increased, and the construction method can meet the requirements of urban overpasses for underground and ground transportation.

Description

technical field [0001] The invention relates to the construction technology of viaduct bridges used for highways and urban roads, in particular to a construction method of assembled corrugated steel oblique web composite girders. Background technique [0002] Compared with steel structural beams, steel-concrete composite beams can save steel and effectively solve the problem that the asphalt pavement on the roof of steel box girders is easily damaged; compared with concrete structural beams (such as the widely used cast-in-place box girders), it The self-weight of the structure can be greatly reduced. Therefore, in urban viaducts, the use of prefabricated composite beams can save construction time, relieve traffic pressure, and reduce noise and dust to a greater extent. It is currently the preferred structural form of urban viaducts. [0003] Most of the existing prefabricated corrugated steel web composite beams are I-beam sections in the form of straight webs due to limit...

AI Technical Summary

Problems solved by technology

The advantages of the straight web I-beam section are regular shape, convenient positioning of corrugated steel plates, and simple formwork; the disadvantages are that the cantilever length of the top plate is relatively small, the clearance of the ground floor under the bridge is limited, the outline is bulky, the amount of concrete is too large, and the wetness during horizontal splicing There are many joints, the torsional rigidity of the open section is insufficient, and it is easy to lose stability during erection. Therefore, the application of straight web I-shaped composite beams in urban viaducts has great limitations.

Images