华东交通大学学报2025，Vol.42Issue(1)：38-44,7.
基于Pasternak模型的基坑开挖对邻近桩基影响分析
Analysis of the Influence of Foundation Pit Excavation on Adjacent Pile Foundation Based on Pasternak Model
摘要
Abstract
In order to accurately predict the influence of foundation pit excavation on adjacent pile foundation,this paper uses two-stage method to analyze the horizontal deformation and settlement of pile foundation based on Pasternak model.In the first stage,the horizontal displacement and vertical settlement of foundation soil at the axis of pile foundation caused by foundation pit excavation are calculated by the formula.In the second stage,the Pasternak model considering soil shear strain is used to simulate the deformation of pile foundation,and the horizontal deformation and settlement of adjacent pile foundation caused by foundation pit excavation are solved by superposition method,and a simplified calculation method is proposed.Based on the monitoring data of foundation pit construction of Hengqin-Mangzhou tunnel project,the accuracy of this method is verified by comparing the calculation results of this paper.The results show that the influence of foundation pit excava-tion on the lateral displacement and bending moment of adjacent pile foundation is mainly within the range of 0.4 times the excavation depth of foundation pit.The influence on the settlement of the pile is mainly in the range of 0.6 times the excavation depth.The method of reinforcing the adjacent soil by supporting structure can effectively reduce the surface settlement value near the supporting structure.关键词
基坑开挖/桩基础/二阶段法/Pasternak模型Key words
foundation pit excavation/pile foundation/two-stage method/Pasternak model分类
土木建筑引用本文复制引用
陈晓飞..基于Pasternak模型的基坑开挖对邻近桩基影响分析[J].华东交通大学学报,2025,42(1):38-44,7.基金项目
国家自然科学基金项目(52108321) （52108321）
