地铁隧道暗挖施工地表沉降模拟分析  

Ground settlement caused by the excavation of mined subway tunnel

作　　者：李涛[1] 嵇长民 冀文欢 张文强[1] 龚文波[1] 万烨[1] 

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《桂林理工大学学报》2016年第4期738-742,共5页Journal of Guilin University of Technology

基　　金：国家自然科学基金重点项目(U1261212);国家自然科学基金青年科学基金项目(51508556);中央高校基本科研业务费专项资金项目(2009QL02);北京高等学校青年英才计划项目(YETP0944)

摘　　要：浅埋暗挖法施工往往会引起不同程度的地表沉降,如何正确预测沉降值对地铁施工安全具有重要意义。本文以北京地铁6号线某区间工程为例,通过现场实际量测数据和FLAC3D的数值模拟对浅埋暗挖隧道施工引起的地表沉降进行详细分析。结果表明:FLAC3D的数值模拟结果与地表沉降实测值相近,地表沉降会经历微小变形、急剧变形、缓慢变形至稳定3个阶段,其中,沉降主要发生在开挖面通过阶段,合理的数值模拟计算能够大致预测施工引起的沉降,并以数值模拟结果为类似工程提供指导和建议。Tunnel constructed by shallow tunneling method would cause settlement more or less,so how to predict the amount of settlement means a lot to the construction.Based on the situ measurement and numerical simulation via FLAC3 D,this article takes 6th line of Beijing subway for example,using FLAC3 Dto calculate the ground settlement caused by the shallow tunneling method.The result shows that the simulation is similar to the value we measured,and the settlement can be divided into three stages,while most settlement occurs when the excavation face overpasses.Reasonable simulation can approximately predict the settlement and provide advice for similar excavation.

关 键 词：浅埋暗挖 地铁隧道 数值模拟 地表沉降 

分 类 号：U459.1[建筑科学—桥梁与隧道工程] P224.1[交通运输工程—道路与铁道工程]