Longitudinal assembly type prestressed bent cap

Abstract

The invention discloses a longitudinal assembly type prestressed bent cap which comprises two prestressed bent cap prefabricated assemblies symmetrically arranged in the longitudinal length directionof the bent cap. Pier column main reinforcement preformed holes are formed in the range of a pier column top joint area of the assembly. Transverse prestressed ducts are formed in the side faces of the assemblies; the overhanging parts of the assemblies are C-shaped sections; transverse partition plates are arranged in the C-shaped sections; transverse prestressed ducts are reserved in the transverse partition plates; transverse prestressed steel bar assemblies tension and fix the two symmetrically-arranged assemblies through the prestressed ducts; and a post-cast strip is arranged at the abutted seam position of the two assemblies. The bent cap has the advantages that the abutted seams are arranged in the longitudinal length direction of the bent cap, internal force in the direction is small, structural weak areas are avoided, the transverse prestressed reinforcements provide a concrete hooping effect, structural bearing capacity and anti-seismic property are improved, and structuralsafety of the bent cap is guaranteed. The overhanging part of the assembly is a C-shaped section, so that a cavity is formed in the bent cap after the assemblies are symmetrically assembled, the selfweight of the bent cap body is greatly reduced, the hoisting batch is reduced, and the hoisting cost is saved.

Description

technical field [0001] The invention relates to a cover beam in an elevated station and a bridge structure; in particular, it relates to a longitudinally assembled prestressed cover beam. Background technique [0002] As the key component of the elevated station and bridge structure, the cover beam needs to play an important role in supporting and transferring the load of the superstructure. In order to solve the problem of factory prefabrication and on-site assembly of the cover beam, the method of hoisting the whole prefabricated cover beam on site or the method of on-site splicing of prefabricated beam segments along the length direction of the beam is often used in existing projects. Publication Nos. CN108560402A and CN203451986U technical solutions respectively disclose the method of splicing a plurality of prefabricated cover beam segments along the length direction of the beam into a whole by using threaded steel connectors and prestressed tendons respectively. The a...

AI Technical Summary

Problems solved by technology

The advantage of the above method is that the construction operation is simple and the construction period is shortened; the disadvantage is that the hoisting cost is relatively high, and the joints of the beam sections are relatively weak, and there are certain safety hazards when the structure is subjected to earthquake action

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