Joint section structure for hybrid beam cable-stayed bridge and construction method thereof

Abstract

The invention discloses a joint section structure for a hybrid beam cable-stayed bridge. The joint section structure comprises a concrete beam-combined beam connecting structure connected between a concrete beam and a combined beam, wherein the combined beam comprises steel girders distributed in the longitudinal direction of the bridge, the steel girders are I-shaped and comprise steel girder top plates, steel girder base plates and steel girder web plates. The steel girder top plates and the steel girder base plates extend into the concrete beam, and the concrete beam-combined beam connecting structure comprises a front pressure bearing plate, a rear pressure bearing plate and a joint section steel web plate. The joint section structure is simple, reasonable in design, high in construction speed and good in using effect, and the problems of complicated structure, poor joint effect and the like existing in a steel-concrete joint portion structure can be solved. The invention further discloses a construction method of the joint section structure. The construction method comprises the steps of 1 erecting a construction support; 2 hoisting a steel structure; 3 constructing the concrete beam-combined beam connecting structure; 4 casting concrete. The construction method is simple in step, reasonable in design, convenient to construct, high in construction speed and good in construction effect.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a joint section structure for a mixed girder cable-stayed bridge and a construction method thereof. Background technique [0002] The main girder materials of cable-stayed bridges generally include steel and concrete. The main girders can be divided into steel girders, concrete girders, composite girders and hybrid girders according to the different combinations of these two materials. Composite beams are composed of steel and concrete in the cross section, which is a combination of different materials in the cross section. The advantages of composite beams are that concrete slabs are used instead of orthotropic steel bridge decks, which are economical, have high rigidity, and can be disassembled into small components for easy transportation and installation. However, the disadvantage is that the bridge deck cracking problem needs to be solved. The compos...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a combination section structure and construction method for a hybrid girder cable-stayed bridge in view of the deficiencies in the above-mentioned prior art, which has a simple structure, reasonable design, fast construction speed, and easy construction quality assurance. It can effectively solve the problems of complex structure, inconvenient construction and poor bonding effect in the steel-concrete joint structure.

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