Concrete pile foundation and abutment semi-rigid connection structure and construction method

Abstract

The invention relates to a concrete pile foundation and abutment semi-rigid connection structure and a construction method. The concrete pile foundation and abutment semi-rigid connection structure comprises a concrete pile foundation and a bridge abutment, wherein a steel bar is pre-buried in a pile head of the concrete pile foundation; the end part of the steel bar extends out of the pile head;the peripheral side of the pile head is wrapped by two pieces of channel steel; an L-shaped steel plate is mounted on the wing plate side of the channel steel; a wing plate of the channel steel, a vertical plate part of the L-shaped steel plate and the end part of the steel bar are locked through screw caps; h-shaped steel is arranged at the pile top of the concrete pile foundation; a horizontal plate part of the L-shaped steel plate is connected with a wing plate at the lower end of the H-shaped steel through a bolt; the outer surface of the H-shaped steel is coated with a compressible rubberlayer; and the H-shaped steel and the bridge abutment are poured into a whole. For the concrete pile foundation and abutment semi-rigid connection structure, concrete at the pile head of the structure is in a three-direction pressed state, so that the vertical bearing capacity is greatly improved, and rigidity sudden change of a concrete pile foundation and a bridge abutment can be delayed, and the stress concentration degree is reduced, and the pile head is prevented from being damaged, and the compressible rubber layer adapts to translation and rotation of the bridge abutment through unevendeformation of compressible rubber materials.

Description

technical field [0001] The invention relates to a semi-rigid connection structure between a concrete pile foundation and an abutment and a construction method. Background technique [0002] As the main girder, abutment and pile foundation of the integral abutment bridge are connected as a whole, the main girder will produce periodic deformation under the action of temperature cycle, and the abutment and pile foundation will also produce a small periodic reciprocating movement in the horizontal direction. The soil interaction is significant, so higher requirements are placed on the horizontal deformation capacity of the pile foundation. At present, the pile foundations of foreign overall bridges are mostly single-row H-shaped steel piles, but the high cost of steel piles is not suitable for my country's national conditions. The commonly used concrete pile foundations in my country have relatively high rigidity, poor deformation capacity and are generally rigidly connected wi...

AI Technical Summary

Problems solved by technology

The commonly used concrete pile foundations in my country have relatively high rigidity, poor deformation capacity, and are generally rigidly connected with the upper abutment by integral pouring, which is unfavorable to the stress of the main girder.

Images