Splicable flange plate of bridge

Abstract

The invention relates to a splicable flange plate of a bridge. In the invention, one side of the splicable flange plate is provided with a secondary casting cast-in-situ wet joint section; reserved connecting reinforcing steel bars conforming to the structure are respectively arranged at the side of an advanced prefabricated flange and above the flange; and moreover, transverse reinforcing steel bars (vertical to the spanning direction of the bridge) at the upper edge and the lower edge in the splicable flange plate both adopt stressed thick reinforcing steel bars to ensure that the structure can simultaneously bear positive and negative bending moments. The invention establishes a foundation for the design and construction standardization of the splicing and broadening reformation of the bridge, simplifies complicated bridge designs and defines complicated stressing modes. The total cost of the splicable flange plate is greatly reduced, and the social benefit is obviously increased. After the splicable flange plate is applied to the construction of interchange bridges constructed in stages or bridges which are designed by modules and simultaneously constructed, fully-prefabricated splicing can be realized, and the construction schedule is accelerated; the splicable flange plate can be used for guaranteeing the using functions and the integral coordination of a main bridge and is convenient for continuous construction; and the splicable flange plate provides great adjustment leeway for subsequent design optimization and also provides a technical support for upgrading and reforming.

Description

technical field [0001] The invention relates to a detailed structure of a bridge, in particular to a spliceable flange plate of a bridge. And the entire bridge expanded and reconstructed by using the spliceable flange plates of the bridge. Background technique [0002] In the current bridge design, regardless of the prefabricated assembled hollow slabs, T beams, composite box girders, or cast-in-place integral box girders, there is no splicing design, which makes future upgrades very difficult. It is necessary to cut the flange plates and then plant reinforcements , and finally use the wet joints to connect with the newly spliced ​​bridges, such as the width of the small and medium-sized bridges of the Shanghai-Nanjing Expressway; and for bridges with bridge deck lateral prestressing, it is necessary to set up broken joints or demolish and build new ones, which is also a lot of Shanghai-Nanjing Expressway There are many examples in the bridge expansion. [0003] There are ...

AI Technical Summary

Problems solved by technology

[0011] 3) The dripping eaves are prefabricated in advance, so it is difficult to ensure uniformity and aesthetics

[0015] 1) The flange plate has no vertical connecting reinforcement, and its integrity with the bridge deck is not strong

[0016] 2) The flange connecting reinforcement is weak, once the unbalanced deflection occurs or the cast-in-place wet joint is too wide, it may lead to insufficient bearing capacity

[0017] 3) It is only designed as the flange of the center beam, which is not unified with the outer flange of the side beam, so it cannot be prefabricated uniformly, and the construction is inconvenient

And this planting process is currently quite expensive

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