Beam bridge composite structure of inverted-groove-shaped steel-concrete bridge deck slab and construction method thereof

Abstract

The invention discloses a beam bridge composite structure of an inverted-groove-shaped steel-concrete bridge deck slab and a construction method thereof. The inverted-groove-shaped steel-concrete bridge deck slab beam bridge composite structure comprises two supporting structures, a hot-rolled H-shaped steel beam set, a plurality of bridge deck slabs and finish-rolled deformed steel bars, whereinthe hot-rolled H-shaped steel beam set is provided with a plurality of hot-rolled H-shaped steel beams, the hot-rolled H-shaped steel beams are transversely erected between the two supporting structures, and support seats are arranged between the hot-rolled H-shaped steel beams and the supporting structures; the bridge deck slabs are sequentially and flatly laid on the two adjacent hot-rolled H-shaped steel beams in the vertical direction of a connecting line of the two supporting structures to form a bridge deck; and the finish-rolled deformed steel bars penetrate through the preformed holesof the bridge deck in the vertical direction of the connecting line of the two supporting structures, and then the multiple bridge deck slabs are spliced. A common steel plate beam is replaced with the hot-rolled H-shaped steel beams, the hot-rolled H-shaped steel beams are wide in flange plate width, large in lateral rigidity, high in bending resistance, good in local stability, high in quality guarantee level and so on, and under the condition that the same bearing capacity is achieved, steel is saved by about 5%-10% compared with welded ''I''-shaped steel.

Description

technical field [0001] The invention relates to a beam bridge structure in the research field of small and medium-span bridges, in particular to a beam bridge composite structure with an inverted groove-shaped steel-concrete bridge deck and a construction method thereof. Background technique [0002] There are currently 700,000 small and medium-span bridges in my country, of which concrete girder bridges are the main ones. Because of their low cost and convenient maintenance, they account for more than 80% of the small and medium-span bridges, with a total of about 600,000. A considerable part of these girder bridges were built before 1990. After 20 to 50 years of operation, these concrete girder bridges have suffered from various degrees of disease. Corrosion, performance degradation of concrete, obvious insufficient bearing capacity and other problems directly affect its safe use. [0003] Due to the large live-to-constant ratio of small and medium-span girder bridges, th...

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Problems solved by technology

After the structure is aged or overloaded, it is easy to crack at the wet joints first, and the phenomenon of single-beam stress occurs, which seriously affects the bearing capacity of the bridge

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