深基坑吊脚桩结构响应规律参数研究

Study on Parameters Influencing the Structural Response Laws of Cantilever Pile Wall in Deep Excavation

该文以梧州市某民用深基坑工程为背景,运用PLAXIS分析了嵌固深度与岩肩宽度对吊脚桩结构变形的影响规律。结果表明:随着嵌固深度增加,支护桩的水平位移、桩身弯矩以及基坑外地表沉降逐渐降低,变化速率逐渐减小;随着岩肩宽度增加,支护桩的水平位移、桩身弯矩以及基坑外地表沉降逐渐降低,变化速率逐渐减小,其中桩体水平位移与弯矩的最大值发生处逐渐向地表方向移动,基坑外地表沉降最大值发生处逐渐远离基坑边缘,建议在采用吊脚桩形式的深基坑施工过程中,预留足够的嵌岩深度与岩肩宽度。该研究可对相似工程提供一定参考。

This paper takes a civil deep excavation project in Wuzhou City as the background and utilizes PLAXIS software to analyze the influence of embedded depth and rock shoulder width on the deformation behavior of cantilever pile walls.The results show that as the embedded depth increases,the horizontal displacement of the retaining piles,the bending moment of the pile body,and the surface settlement outside the excavation pit gradually decrease,with the rate of change gradually diminishing.Similarly,as the rock shoulder width increases,the horizontal displacement of the retaining piles,the bending moment of the pile body,and the surface settlement outside the excavation pit also gradually decrease,and the rate of change decreases gradually.Notably,the locations of the maximum horizontal displacement and bending moment of the piles gradually shift towards the surface,while the location of the maximum surface settlement outside the excavation pit gradually moves away from the pit edge.It is recommended that sufficient embedded depth and rock shoulder width should be reserved during the construction of deep excavations utilizing cantilever pile walls.This study provides valuable reference for similar engineering projects.