Flexible connection structure for pile and pile cap and construction method

Abstract

The invention relates to a flexible connection structure for a pile and a pile cap. The flexible connection structure comprises a top end steel plate, an elastic sleeve, an embedded steel plate and a plurality of shear nails, wherein the pile is a steel pipe concrete pile which comprises a steel pipe; concrete is poured into the steel pipe; the top end steel plate is welded and fixed at the top end of the steel pipe; the elastic sleeve sleeves the top end steel plate and the steel pipe; the multiple shear nails are welded and fixed at the tops of the embedded steel plate; the multiple shear nails and the embedded steel plate are arranged in the pile cap; the pile cap sleeves the top end of the pile, and a blind hole matched with the elastic sleeve is formed in a position, located on the embedded steel plate, on the pile cap; the bottom of the embedded steel plate is in contact with the tops of the elastic sleeve and the top end steel plate. The invention further relates to a construction method of the flexible connection structure for the pile and the pile cap. According to the flexible connection structure, a pile head and the pile cap rotate relatively, so that a transverse displacement allowance of the top structure is increased; meanwhile, the bending moment of the pile can be obviously reduced due to the transverse displacement.

Description

technical field [0001] The invention relates to a flexible connection structure between a pile and a pile cap and a construction method. Background technique [0002] At present, most of the connections between conventional piles and pile caps are rigid connections. After the pile yields, the concrete pile cap rotates around the pile head, and then affects the rest of the superstructure. However, this interface is relatively rigid. Therefore, the length of the pile embedded in the concrete pile cap will affect its connection ability and the mechanical properties of the entire structure. Compared with the upper structure (such as main girder, bridge deck, etc.), Due to the large abutment and its rigidity, when the upper end of the pile is subjected to a large horizontal thrust and torsion imposed by its superstructure, it is difficult to control the longitudinal displacement and rotation, and the structure is prone to damage. Contents of the invention [0003] In view of t...

AI Technical Summary

Problems solved by technology

However, this interface is relatively rigid. Therefore, the length of the pile embedded in the concrete pile cap will affect its connection ability and the mechanical properties of the entire structure. Compared with the upper structure (such as main girder, bridge deck, etc.), Due to the high rigidity of the abutment and the pile, it is difficult to control the longitudinal displacement and rotation when the upper end of the pile is subjected to a large horizontal thrust and torsion imposed by its superstructure, and the structure is prone to damage

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