Novel assembly type bridge lower structure

Abstract

The invention discloses a novel assembly type bridge lower structure which comprises pier stand columns composed of profile steel stand column inner cores and concrete reinforcing layers poured aroundthe profile steel stand column inner cores, the tops of the inner cores extend out of the concrete reinforcing layers to form top socket sections, and the bottoms of the inner cores extend out of theconcrete reinforcing layers to form bottom socket sections. Pier caps are arranged on a bent cap, and top socket grooves matched with the top socket sections are formed in the pier caps. Bearing platforms are of a cast-in-place reinforced concrete structure, and bottom socket grooves matched with the bottom socket sections are formed in the bearing platforms. Poured reinforcing layers are high-strength shrinkage-free cement grouting material layers poured into top inserting seams formed by the top socket sections and the top socket grooves and bottom inserting seams formed by the bottom socket sections and the bottom socket grooves. According to the invention, the socket sections of the inner cores of the large-size section steel stand columns are respectively in socket connection with the bent cap and the bearing platforms, so that the construction precision requirement is reduced, the construction process is simplified, and the construction period is greatly shortened.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a novel fabricated bridge substructure. Background technique [0002] The bridge substructure is used to support the bridge superstructure and transfer the load from the superstructure to the foundation safely to achieve the purpose of joint force. Traditional construction mostly adopts cast-in-place reinforced concrete construction technology, which needs to set up supports on the construction site, which has a great impact on surrounding road traffic; in the later stage, the cast-in-place reinforced concrete structure needs to be maintained, resulting in a long construction period; the overall standardization degree is low, and the quality The controllability is poor, and it cannot meet the requirements of green and civilized construction. In order to overcome the above shortcomings, scholars at home and abroad have proposed the technical route of prefabricated con...

AI Technical Summary

Problems solved by technology

like Figure 1c The substructure of the prefabricated bridge connected by the grouting sleeve shown is that the ribbed steel bar J3 is inserted into the grouting sleeve T pre-embedded in the concrete component, and the grouting material is injected from the outside of the prefabricated component through the grouting pipe at the hoisting installation site. Sleeves are used to complete the connection of steel bars in prefabricated components, but the grouting sleeves of the main components of this substructure form have a small aperture and a large number of installations, requiring high construction accuracy and complicated construction techniques

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