Thin-wall open steel box-prestressed reinforced concrete combined cover beam and construction method

Abstract

The invention relates to a thin-wall open steel box-prestressed reinforced concrete combined cover beam and a construction method. The combined cover beam comprises a thin-wall open steel box and a pier column. An internal reinforcement cage is arranged in the thin-wall opening steel box, and concrete is poured; a pier top pre-embedded wedge-shaped steel block is arranged at the top of the pier column, a bent cap bottom reinforcing steel plate is fixedly welded to the position, corresponding to the pier column, of the bottom of the thin-wall open steel box, and the pier top pre-embedded wedge-shaped steel block is fixedly welded to the bent cap bottom reinforcing steel plate, so that connection between the pier column and the thin-wall open steel box is achieved. The steel box disclosed by the invention has the characteristics of high strength, light weight, easiness in splicing and the like, can form a steel-concrete structure with internal prestressed reinforced concrete, and also can be used as a template of internal post-pouring concrete, so that the amount of labor used for supporting and disassembling the template is saved, the construction progress is accelerated, and the influence on passing under a bridge is reduced; an effective and reasonable solution is provided for solving the problems of green, assembly and quick construction of the long and large bent cap at present.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a thin-wall open steel box-prestressed reinforced concrete composite cover beam and a construction method. Background technique [0002] At present, cast-in-place construction is still the main method for oversized capping beams. Cast-in-place construction requires a large number of supports and formwork, which seriously hinders the passage under the bridge; and many construction equipment are on the construction site, causing serious dust and noise pollution, bringing a lot of inconvenience to the production and life of residents around the construction site, and restricting the green environment. Urban development hinders social progress. [0003] Assembly construction has been widely used in the bridge superstructure and has become mature. With the increase of traffic volume, the construction of six-lane expressways and urban viaducts has become a common demand. T...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a thin-walled open steel box-prestressed reinforced concrete composite cover beam and its construction method, which can solve the problems of heavy hoisting weight of a prefabricated cover beam and difficulties in transportation and hoisting, reduce construction risks, and speed up construction efficiency. Guaranteed passage under the bridge

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