地铁车站洞桩法开挖中板下土体的侧向作用研究  

Research on the Soil Lateral Effect during the Excavation with PBA Method in a Subway Station

作　　者：耿东阳[1] 赵文[1] 周永伟[1] 李艺[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《探矿工程（岩土钻掘工程）》2010年第3期71-73,81,共4页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：国家自然科学基金项目(项目编号:50508008)

摘　　要：为得到在开挖过程中围护桩受到的弯矩和侧向位移随开挖深度变化的规律,对比分析不同断面在开挖中板下土体过程中加撑与不加撑对围护桩内力和位移的影响,采用了GTS软件对中街车站PBA法开挖中板下土体进行二维分析,确定了钢支撑的间距和位置,得出了加撑后围护桩所受的最大弯矩及侧向位移都有较大幅度的减小的结论,其中最大弯矩能减少27.8%,侧向偏移最多能减少31.7%。In order to get the moment of retaining pile during the excavation and the regulation of lateral displacement changing with excavation depth, comparative analysis was made on the internal force and displacement of retaining pile both with and without steel support during the excavation in different crossing-sections. Two-dimenslonal analysis was made on the excavation soll in Zhongjie Station with PBA method by MIDAS - GTS to determined the location and the spacing of the steel support and the conclusion was got that the largest moment of piles and the displacement would be reduced 27.8% and 31.7% respectively with steel support.

关 键 词：稳定性 有限元 加撑 弯矩 位移 地铁车站 

分 类 号：U231.3[交通运输工程—道路与铁道工程]