A monolithic abutment jointless bridge suitable for concrete rigid piles

Abstract

A monolithic abutment jointless bridge suitable for concrete rigid piles is characterized in that the lower end of the abutment and the upper end of the pile foundation are slidably connected througha sliding connection structure; The sliding connection structure comprises a compressible material, a cushion block, a sliding layer, a thin steel plate and a stud. A layer of compressible material isadhered on four sides of the top of the pile foundation, and a shallow notch is reserved in the top center of the pile foundation. A cushion block is arranged in the shallow notch, and the length andwidth of the cushion block are consistent with the length and width of the shallow notch; A sliding layer is coated on that cushion block, and the upper surface of the sliding layer and the upper surface of the compressible material are at the same horizontal position; A thin steel plate is arranged above the sliding layer; A plurality of bolts are welded on the upper surface of the thin steel plate. The invention provides an integral abutment seamless bridge suitable for concrete rigid piles, which allows the abutment to slide and rotate on the top of the pile by being provided with a sliding connection configuration at the joint of the abutment and the concrete pile, thereby releasing the restraint.

Description

technical field [0001] The invention relates to an integral abutment seamless bridge suitable for concrete rigid piles. Background technique [0002] my country is a big bridge country, and the demand for economic development promotes the large-scale construction of bridges. The commonly used bridge types of seamless bridges mainly include integral abutment bridges, semi-integral abutment bridges, and extended deck bridges. Integral abutment bridges are referred to as integral bridges for short. Integral bridges eliminate expansion joints and supports, which solves the problems of the vulnerability of expansion joints of bridges with seams, abutment jumping and high post-maintenance costs. Integral bridges require that the foundation at the abutment be a flexible structure, and H-shaped steel piles are mostly used for the pile foundations of integral bridges in the United States. However, due to the disadvantages of steel corrosion and high price, it is rarely used in Chin...

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of steel corrosion and high price, it is rarely used in China.

Concrete piles commonly used in China are applied in integral bridges due to their high rigidity and poor deformation capacity. Under the influence of external seasonal temperature differences, the joints between abutments and piles are stressed, and even the concrete at the joints cracks.

This shortcoming is more prominent in areas with high stiffness of the foundation soil, which affects the promotion and application of the overall bridge

Images