隧道开挖引起地表位移的数值模拟研究

摘要

The tunnel excavation leads to disturbance of overbite soil and the original equilibrium state of stress is damaged,leading to the surface deformed and impact on the surrounding buildings.In this paper,taking a certain subway tunnel as an example,we apply the ANSYS to calculate the surface subsidence of tunnel excavation in the dynamic process,analyse the effect of the surface subsidence on the surrounding environment,especially the buildings and put forward the corresponding defensive counter measures,in order to ease the impact of tunnel excavation on the buildings.%隧道开挖扰动隧道上覆岩土层,原有的应力平衡状态发生破坏,导致地表发生移动和变形从而对周边建筑物产生影响.以某地铁隧道为例,应用ANSYS计算隧道开挖这一动态过程引起的地表沉降,分析地表沉降对周围环境尤其是建筑物的影响,并提出相应的防御解决措施,以此来减少隧道开挖对建筑物的影响.