横向位移作用下桥梁桩基变形分析与加固处理技术

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中图分类号：TQ323.8；TU74 文献标识码：A 文章编号：1001-5922（2025）06-0164-04

Deformation analysis and reinforcement treatment technology of bridge pile foundation under transverse displacement

ZHANG Ningjun （China Railway No.3 Engineering Group the Second Engineering Co.，Ltd.，Shijiazhuang ，China）

Abstract：In order to improve the service life and stability of bridge pile foundation，the deformation of bridge pile foundation under lateral displacement is analyzed，and the reinforcement technology of bridge pile foundation is de⁃ signed. The finite element model of pile foundation is constructed to calculate and analyze the bending moment and displacement deformation of bridge pile foundation under lateral displacement. After determining the deformation， the polyurethane fly ash reinforcement and isolation pile protection reinforcement are used to strengthen the pile foundation，and the bending moment，displacement，ductility coefficient and bearing capacity of the reinforced pile foundation under the action of lateral displacement are analyzed. The results show that after the reinforcement treat⁃ ment，the bending moment and displacement of the pile foundation are obviously reduced，the ductility coefficient and bearing capacity of the pile foundation are obviously increased， and the stability of the pile foundation is obvi⁃ ously improved.

Key words：transverse displacement；bridge pile foundation；deformation analysis；reinforcement treatment；poly⁃ urethane fly ash；isolation pile protection

桥梁桩基是桥梁基础的一种形式，大多为钢混结构[1]。（剩余5099字）