邻近高架桥桩分离岛式车站基坑开挖三维数值模拟分析  

3D numerical simulation analysis of foundation pit excavation for separated island type station adjacent to elevated viaduct pile

作　　者：李新章 Li Xinzhang

机构地区：[1]中铁上海设计院集团有限公司,上海200070

出　　处：《现代城市轨道交通》2018年第8期48-53,58,共7页Modern Urban Transit

摘　　要：结合某市地铁邻近高架桥桩的分离岛式车站,采用MIDAS GTS软件模拟车站基坑开挖过程,分析基坑自身安全稳定性及基坑开挖的不同阶段对邻近高架桥桩的水平位变形及沉降影响。研究表明,现有支护方案存在偏压风险且桥桩的横桥向偏移超出规范限值,并基于计算结果提出加固与保护措施。Taking a separated island type station of a nearby elevated viaduct pile in metro as an example,this paper uses MIDAS GTS software to simulate the excavation process of the station foundation pit,and analyzes the influence of the safety and stability of the foundation pit and the horizontal deformation and settlement of the adjacent viaduct pile at different stages of foundation excavation.The study shows that the existing support schemes have the bias risk and the lateral displacement of the bridge pile exceeds the specified allowable limit,and reinforcement and protection measures are put forward based on the calculation results.

关 键 词：地铁车站 高架桥桩 基坑开挖 模拟分析 

分 类 号：U231.3[交通运输工程—道路与铁道工程]