Bridge support structure and bridge pile foundation construction technology for increasing pile foundation flexibility

Abstract

The invention provides a bridge support structure and a bridge pile foundation construction process for increasing the flexibility of the pile foundation, which is suitable for bridge support in areas with shallow coverage of complete rock formations, which includes a pile basic body, an expansion casing and a filling layer. The basic body has a first support section and a second support section along the central axis direction, the first support section is inserted into the reaming casing, and the outer peripheral wall of the first support section is in contact with the reaming casing The inner cylinder wall of the cylinder is in contact, the second support section protrudes from one end of the reaming casing, and the second support section is in contact with the rock formation; the filling layer is wrapped in the outer cylinder of the reaming casing on the wall. The pile foundation structure is simple and reasonable, and the settlement of the pile foundation is uniform, which effectively ensures the joint force of the pile foundation and the adjacent pier pile foundation on the horizontal impact, and strengthens the durability of the pile foundation.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a bridge support structure and a bridge pile foundation construction process for increasing the flexibility of the pile foundation. Background technique [0002] For karst landforms, karsts are developed and the rock formations fluctuate greatly, and some of the rock formations have good integrity, high strength and shallow burial depth. During the construction of the bridge in this area, the upper part of the pile foundation is located in the whole slate layer, the depth of the pile foundation is insufficient, and the stiffness of the pile top is too large. [0003] There are mainly two methods of existing processing technology: [0004] The first is to break the rock formation to a certain depth. This method involves the breaking of the rock in the foundation pit, which is poor in safety and time-consuming and labor-intensive; [0005] The second is to replace the pile found...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a bridge support structure to improve the problems of poor safety and high cost of the pile foundation during the construction of the traditional bridge pile foundation located in the shallow-covered and complete rock formation area

[0007] The purpose of the present invention is to provide a bridge pile foundation construction process to improve the poor safety and high cost of the pile foundation during the construction of the traditional bridge pile foundation located in the shallow coverage of complete rock formations

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