基于渗流-应力耦合分析的基坑开挖对既有桥墩位移的影响  

Influence of foundation pit excavation on displacement of existing bridge piers based on seepage-stress coupling analysis

作　　者：赵娜 ZHAO Na(Nanjing Design Institute of China Railway Shanghai Design Institute Group Co.,Ltd.,Jiangsu Nanjing 210000 China)

机构地区：[1]中铁上海设计院集团有限公司南京设计院,江苏南京210000

出　　处：《山东交通科技》2023年第3期119-122,共4页

摘　　要：以扬州市某深基坑工程为背景,利用Midas GTS有限元软件,模拟了不考虑渗流和考虑渗流-应力耦合两种情况下基坑开挖数值模拟,对比计算分析了两种情况下深基坑开挖对既有高铁桥墩墩顶和承台的水平向和沉降方向位移的影响,得出渗流是影响深基坑变形的重要原因。Based on a deep foundation pit project in Yangzhou city,Midas GTS finite element software is used to simulate the numerical simulation of foundation pit excavation without considering seepage and considering seepage-stress coupling.The influence of deep foundation pit excavation on the horizontal and settlement displacement of the pier top and cap of the existing high-speed railway bridge under the two conditions is compared and analyzed.It is concluded that seepage is an important reason for the deformation of deep foundation pit.

关 键 词：基坑降水 渗流 应力耦合 有限元 

分 类 号：U416.217[交通运输工程—道路与铁道工程]