水力发电2025，Vol.51Issue(10)：46-52,7.
基坑开挖对邻近桩基的影响和隔离墙体优化设计
Influence of Foundation Pit Excavation on Adjacent Pile Foundation and Optimal Design of Isolation Wall
摘要
Abstract
Based on laboratory model test,the influence of foundation pit excavation on adjacent double-pile foundation is analyzed,and the reasonable design parameters of the isolation wall in the active zone are analyzed by numerical simulation method.The results show that:(a)the additional bending moment and horizontal displacement of front and rear piles increase with the increase of excavation depth,and reach the maximum value when the excavation reaches the bottom of foundation pit;(b)the maximum bending moment of front and rear piles decreases by 71.33％and 61.54％,respectively,and the maximum horizontal displacement of pile top decreases by 83.3％when the wall depth is 1.5 times the excavation depth;(c)the increase of the stiffness of isolation wall has more obvious control effect on the horizontal displacement of pile than the additional bending moment;and(d)the additional bending moment and horizontal displacement of the pile body decrease with the decrease of the distance between the added solid and the pile foundation,and the isolation wall should be as close to the pile foundation as possible under the premise of construction conditions.关键词
基坑开挖/桩基础/数值模拟/隔离墙体/附加弯矩/水平位移Key words
foundation pit excavation/pile foundation/numerical simulation/isolation wall/additional bending moment/horizontal displacement分类
建筑与水利引用本文复制引用
欧明喜,赵校钰,戴志峰..基坑开挖对邻近桩基的影响和隔离墙体优化设计[J].水力发电,2025,51(10):46-52,7.基金项目
国家自然科学基金资助项目(51968036) （51968036）
云南省基础研究计划项目(2017FB088) （2017FB088）
