Construction method of integral abutment bridge with dog-bone connection structure

Abstract

The invention discloses a novel integral abutment bridge with a dog-bone shaped connecting structure and construction method. The bridge comprises an end beam, a pile cap and an H-shaped supporting steel pile; a weak shaft of an H-shaped steel pile body is bent; the pile cap is connected with the end beam by the dog-bone shaped connecting structure, wherein the dog-bone shaped connecting structure is that a compressing rubber material fills in a connecting clearance between the pile cap and the end beam, and the pile cap and the end beam are connected through the H-shaped steel pile. According to the bridge, the H-shaped steel pile can bear the vertical load through the surface friction and even the end part, and moreover, the characteristics that the lateral rigidity of the weak shaft is low is utilized well; the rigidity of the connecting part is reduced by the dog-bone shaped connecting structure between the pile cap and the end beam, thus the rotating capacity of the connecting part is improved, the longitudinal deformation capacity of the bridge is increased, the allowable length of the bridge of the type is raised, a pile foundation is avoided excessive lateral displacement, the vertical bearing capacity of the pile is ensured, the internal force of the pile body is decreased, the fatigue damage of the temperature deformation of the bridge to the pile body is reduced, and as a result, the service life of the bridge is prolonged.

Description

technical field [0001] The invention relates to a construction method of an integral abutment bridge with a dog-bone connection structure, which belongs to the field of bridges. Background technique [0002] The integral bridge cancels the expansion device and the support, and the abutment and the main girder are made into an integral structure, which is a large category of seamless bridge. The expansion and contraction of the overall bridge superstructure must be constrained by the abutment. The abutment body is generally a rigid structure, mainly reinforced concrete structure, and its ability to adapt to the temperature deformation of the bridge superstructure is mainly provided by the foundation. The foundation can be single-row piles or double-row piles, among which single-row piles are the most widely used, and the greater the stiffness, the greater the horizontal force and bending moment on the pile foundation itself. Therefore, flexible steel piles are generally use...

AI Technical Summary

Problems solved by technology

[0003] However, the pile foundation not only bears the vertical load and horizontal load transmitted by the bridge superstructure, but also bears the earth pressure behind the abutment. The force situation is not only complicated (pile-soil interaction is a nonlinear problem), but also unfavorable.

More importantly, the overall bridge end beam and pile cap are generally rigidly connected, resulting in poor rotation ability and concentrated stress at the joint, resulting in plastic hinges, fatigue damage or even destruction, affecting the life of the bridge and increasing maintenance costs

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