浅埋暗挖地铁隧道施工方案FLAC优化分析  

Optimization analysis on subway tunnel construction plan by shallow dark excavation method with FLAC

作　　者：任建喜[1] 张引合[1] 高丙丽[1] 张琨[1] 孙扬[1] 刘慧[1] 刘朝科[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《西安科技大学学报》2011年第2期157-162,共6页Journal of Xi’an University of Science and Technology

基　　金：西安科技大学培育基金项目(200607);陕西省教育厅科研计划资助项目(2010JK667)

摘　　要：以北京地铁奥运支线奥森区间隧道工程为依托,将上下台阶法与预留核心土法作为拟采用的2种隧道开挖施工方案,运用FLAC软件对2种隧道开挖施工过程进行了模拟。根据FLAC模拟结果,确定预留核心土法作为浅埋暗挖的施工方案。运用FLAC模拟的结果预测地表变形规律。建议了超前小导管注浆和格栅钢架的联合施工方法为奥森区间隧道地表沉降变形的控制措施。工程实践表明,FLAC模拟建议的施工方案是合理可行的。FLAC计算预测的地表变形值与实测值基本一致。Based on AO-SEN regional tunnel engineering of Olympic branch line of Beijing subway, taking reservation core soil method and benching tunneling method as construction plan, the tunnel excavation and construction process of 2 construction plans mentioned above are simulated with FLAC software. Reservation core soil method was determined as the construction scheme of shallowly buried and darkly excavated tunnel according to FLAC simulation results. The surface deformation law is predicted by using FLAC simulation results. It is proposed that joint construction method combined leading steel pipeline shed, ahead ductile grouting method and grid steel frame serve as control measures for surface settlement and deformation of AO-SEN regional tunnel. It shows that, FLAC simulation program of the proposed construction is reasonable and feasible. The prediction values of the surface deformation is consist with the monitoring values.

关 键 词：地铁隧道 地表沉降 FLAC模拟 

分 类 号：TU74[建筑科学—建筑技术科学]