Steel beam segment, continuous combined beam bridge and construction method of continuous combined beam bridge

Abstract

The invention relates to the field of beam bridge construction and discloses a steel beam segment. The steel beam segment comprises a left part and a right part. A gap formed in an opposite-pulling manner is formed between the left part and the right part. The left part and the right part are connected in a welded manner. A continuous combined beam bridge comprises two abutment piers and at least one middle pier located between the two abutment piers. The pier top of the middle pier is provided with the steel beam segment. Multiple combined beam segments are arranged on the two sides of the steel beam segment. A construction method of the continuous combined beam bridge includes the following steps that firstly, the steel beam segment formed by splicing the left part and the right part is provided, the left part and the right part of the steel beam segment are connected through bolts, and the bolts are tensioned; secondly, the combined beam segments are installed on the two sides of the steel beam segment till a steel beam is closed; and thirdly, the bolts on the steel beam segments are loosened gradually, and the left part and the right part of the steel beam segment are welded. By the adoption of the steel beam segment, the continuous combined beam bridge, and the construction method of the continuous combined beam bridge, the working performance of a concrete bridge panel can be greatly improved.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a steel girder segment, a continuous composite beam bridge and a construction method for a continuous composite beam bridge. Background technique [0002] Composite girder bridge refers to the connection of steel girder and concrete bridge deck as a whole through shear connectors. It is a bridge structure that makes both of them work together. features. Composite girder bridges generally adopt cantilever construction. During the construction process, the concrete deck of the upper flange of the composite girder bridge is pulled and closed to form a bridge. Extremely unfavorable stress makes it very easy to crack, and the width of the crack is difficult to control, which has a negative impact on the structural durability of the beam bridge and the overall bridge, and it is difficult to give full play to the advantages of the strong compressive capacity of the composite beam con...

AI Technical Summary

Problems solved by technology

Composite girder bridges generally adopt cantilever construction. During the construction process, the concrete deck of the upper flange of the composite girder bridge is pulled and closed to form a bridge. The force is extremely unfavorable, making it easy to crack, and the width of the crack is difficult to control, which has a negative impact on the structural durability of the beam bridge and the overall bridge, and it is difficult to give full play to the advantages of the strong compressive capacity of the composite beam concrete bridge deck

[0003] At present, the commonly used methods to solve such problems are as follows: First, assign more longitudinal prestress to the concrete bridge deck, but this will lead to poor structural economy of the bridge, and part of the prestress will be shared by steel girders. Second, the concrete bridge deck is installed after the steel girders are assembled and closed by cantilever, but the result is that the internal force shared by the concrete bridge deck is small, and the internal force shared by the steel beam is relatively small. Large, the force of the entire bridge structure does not match, and the steel material has increased, which increases the project cost

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