中文摘要：

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。

英文摘要：

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.