基坑开挖对紧邻下卧地铁隧道变形的影响与控制研究  

Study on Influence and Control of Foundation Pit Excavation on Deformation of Adjacent Subway Tunnel

作　　者：吴剑秋 孙旻[1] 蔡庆军[2] 杜佐龙[2] 王朝龙[2] WU Jianqiu;SUN Min;CAI Qingjun;DU Zuolong;WANG Chaolong(China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200135,China;China Construction Eighth Engineering Division Corp.Ltd.South China Branch,Guangzhou,Guangdong 510663,China)

机构地区：[1]中国建筑第八工程局有限公司,上海200135 [2]中国建筑第八工程局有限公司华南分公司,广东广州510663

出　　处：《建筑施工》2020年第2期145-148,共4页Building Construction

摘　　要：以紧邻深圳地铁11号线既有隧道上方的深圳机场卫星厅基坑工程为背景,采用Plaxis 3D软件对基坑的实际施工过程进行动态模拟。在此基础上,对基坑开挖引起的下卧隧道变形进行了研究。研究了不同“分层分段”基坑开挖方案对隧道变形的影响,分析了转换梁和转换板结构对地铁隧道变形的控制效果。计算结果显示,在基坑施工中,合理利用空间效应的跳仓法开挖和施做转换板结构可有效控制隧道隆起。Based on the foundation pit project of Shenzhen Airport Satellite hall,which is close to the existing tunnel of Shenzhen Metro Line 11,this paper uses Plaxis 3D software to simulate the actual construction process of the foundation pit.On this basis,the deformation of the underlying tunnel caused by the excavation of foundation pit is studied.This paper studies the influence of different"layered and segmented"excavation schemes on tunnel deformation,and analyzes the control effect of transfer beam and transfer plate structure on the deformation of subway tunnel.The results show that in the construction of foundation pit,the reasonable use of space effect of sequence construction method and construction of transfer plate structure can effectively control the tunnel uplift.

关 键 词：基坑开挖 隧道变形 跳仓法 转换板 数值模拟 

分 类 号：TU753.1[建筑科学—建筑技术科学]