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

Abstract

The invention provides a bridge support structure and a construction process of a bridge pile foundation for increasing the flexibility of the pile foundation. The bridge support structure is suitablefor bridge support shallowly covering a whole rock layer region, and comprises a pile foundation body, a reaming pile casing and a filling layer; the pile foundation body is provided with a first supporting section and a second supporting section in the central axis direction, the first supporting section is connected into the reaming pile casing in an inserted mode, the outer peripheral wall ofthe first supporting section is in contact with the inner cylinder wall of the reaming pile casing, the second support section extends out from one end of the reaming pile casing, and the second support section is in contact with a rock formation; and the filling layer covers the outer cylinder wall of the reaming pile casing. The pile foundation structure is simple and reasonable, the pile foundation settlement is even, and the common stress of the horizontal impact on the pile foundation and the adjacent pier pile foundation is effectively ensured, so that the durability of the pile foundation is strengthened.

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 technique for increasing pile foundation flexibility. Background technique [0002] For the karst landform, the karst is well developed and the rock formations fluctuate greatly, some of which have good integrity, high strength and shallow buried depth. During the construction of the bridge in this area, the upper part of the pile foundation is located in the entire rock layer, the depth of the pile foundation is insufficient, and the stiffness of the pile top is too high. When there is a horizontal impact on the upper part of the bridge, the stress on this part is concentrated and it is easy to be damaged. [0003] There are mainly two methods of existing processing technology: [0004] One is to break the rock formation to a certain depth. This method involves breaking the rock in the foundation pit, which i...

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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