Small and medium span rigid frame bridge steel pier bottom consolidation structure

Abstract

The invention discloses a small and medium span rigid frame bridge steel pier bottom consolidation structure which comprises a steel pier and a foundation platform, the lower end of the steel pier is consolidated with the foundation platform, a steel shoe component is arranged at the bottom of the steel pier, the steel shoe component is connected with one end of each retard-bonded prestressed steel strand. And the other end of each retard-bonded prestressed steel strand is pre-buried and fixed in the foundation platform, that is, the bottom of the steel pier is fixedly connected with the foundation platform through the plurality of retard-bonded prestressed steel strands. The retard-bonded prestressed steel strands are connected with the steel piers and the foundation platform in a tensioning mode, pier bottom consolidation is achieved, loads borne by the steel piers can be effectively transmitted to the foundation platform, and the bending moment of the pier bottom is resisted by tensioning the retard-bonded prestressed steel strands. The circumferential weld between the steel pier and the pier bottom pressure-bearing steel plate is prevented from being directly pulled through steel shoe conversion.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a fixed structure at the bottom of a steel pier of a rigid frame bridge with a small and medium span. Background technique [0002] With the rapid development of my country's economy, the use requirements and technical standards of bridge construction continue to increase, and the design concept of bridges pays more attention to the driving or pedestrian comfort, durability, and construction convenience of bridges. The steel structure rigid frame bridge has the advantages of small girder height, large spanning capacity, high structural rigidity, high pedestrian comfort, no need for supports, beautiful appearance, good bridge deck smoothness, high seismic performance, convenient construction, and little interference to traffic. , is an excellent form of bridge structure. [0003] Compared with beam bridges, rigid frame bridges increase the structural rigidi...

AI Technical Summary

Problems solved by technology

[0004] For rigid-frame bridges with small and medium spans, the cross-section of the pier is small and the thickness of the cap is small. The use of prestressed short beams requires a large space for anchoring and tensioning, and the loss of prestress is large. The use of precision-rolled rebar requires high construction requirements and difficult construction quality. Both of them have the problems of difficult grouting quality control and durability, and the construction of PBL shear key used in conventional structures is also relatively complicated

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