大断面浅埋地铁施工对地表影响的模型试验  

Model Test on Ground Surface Impact Caused by Large-section Shallow-buried Metro Construction

作　　者：孟凡磊 张东 童建军[2] 

机构地区：[1]山东省交通设计规划院,济南250031 [2]西南交通大学峨眉校区,四川峨眉山614200

出　　处：《路基工程》2011年第5期100-102,共3页Subgrade Engineering

摘　　要：以广州地铁站前停车线为工程背景,通过室内大比例相似模型试验,结合数值模拟计算,研究大断面浅埋地铁在上下台阶法不同开挖步骤中产生的洞周位移、地表和地层的位移响应。结果表明:通过相应的辅助工法和合理的施工工序,台阶法能有效控制上台阶开挖引起的洞周位移和地表沉降,从而控制整个隧道开挖对周边环境的影响,保证隧道快速、安全施工。Taking stop line engineering of Guangzhou Metro Station for example,through similar indoor large-scale model test,combined with numerical simulation,the convergence of tunnel perimeter,displacement response of ground surface and stratum during excavation of large-section shallow-buried metro by benching tunneling method are studied.The results show that through the corresponding auxiliary construction method and reasonable construction procedures,benching tunneling method can effectively control convergence of tunnel perimeter and ground surface settlement caused by upper bench excavation,and thus reduces the impact on ambient environment to ensure rapid and safe construction.

关 键 词：地铁 台阶法 地表位移 地层位移 洞周位移 

分 类 号：TU411.93[建筑科学—岩土工程]