A Method for Longitudinal Connection of the Main Girder at the Continuation of the Bridge Deck of a Steel-Concrete Composite Bridge

Abstract

The invention relates to a method for longitudinally connecting a main beam at a continuous position of a steel-concrete composite bridge deck, which comprises the following steps: 1) welding or bolting a section steel, a stiffening rib and a shear key according to design requirements in a factory according to design drawings to produce a steel beam; the corresponding position of the web of the section steel is provided with a reserved bolt hole for arranging the U-shaped steel hinge; 2) transporting the processed steel beam to the construction site, fixing it on the temporary support, arranging rubber cushion at the end of the steel beam, laying formwork, pouring concrete bridge deck and curing, and removing the formwork when the strength of concrete bridge deck reaches the requirements of the specifications; 3) connecting the two side steel beams with the prefabricated U-shaped steel hinge standard parts; 4) removing the temporary support, and landing the steel beam on the permanentsupport to complete the connecting structure at the continuous position of the main beam of the steel-concrete composite continuous beam bridge. The connecting method of the invention has the advantages of firm structure, rapid construction, cost saving and the like.

Description

【Technical field】 [0001] The invention relates to a bridge connection structure and a construction method thereof, in particular to a method for longitudinally connecting main girders at continuous bridge decks of steel-concrete composite bridges, and belongs to the technical field of bridge engineering. 【Background technique】 [0002] In existing prefabricated steel-concrete composite girder bridges, the connection mode of the main girder at the continuous part of the bridge deck mainly adopts rigid connection, while the upper concrete bridge deck adopts the method of integral cast-in-place. Rigid connection at the continuous part of the bridge deck belongs to the statically indeterminate structure, the structure is relatively complex, and due to the existence of the negative bending moment of the fulcrum at the continuous point, the concrete near the fulcrum bears a large tensile force. In actual engineering, the concrete slab above the fulcrum is often with Crack work, af...

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Problems solved by technology

Rigid connection at the continuous part of the bridge deck belongs to the statically indeterminate structure, the structure is relatively complex, and due to the existence of the negative bending moment of the fulcrum at the continuous point, the concrete near the fulcrum bears a large tensile force. In actual engineering, the concrete slab above the fulcrum is often with Crack work, after the bridge deck pavement and structure are jointly stressed, is further aggravated by various factors such as repeated rolling by heavy vehicles, temperature effects of the structure, rainwater penetration, rusting of steel bars, and shrinkage and creep of concrete. Transverse cracks occur in the pavement layer of the bridge deck, which has an adverse effect on driving

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