地铁隧道近距离下穿铁路路基安全评估

Safety Assessment of Underpass Railway Subgrade in Short Distance of Subway Tunnel

结合乌鲁木齐地铁2号线乌鲁木齐站站-华山街站区间隧道下穿铁路的工程实例,利用有限元软件MIDAS-GTS建立三维模型,对铁路路基受新建隧道施工的影响进行数值仿真分析,得到铁路路基的整体沉降、差异沉降等定量结果。为尽量减小因隧道施工导致的围岩变形和地层损失给铁路带来的不利影响,提出了工程建议及控制措施。

In combination with the engineering project of the underpass railway of the tunnel between Urumqi station and Huashan Street station of Urumqi Metro Line 2,the three-dimensional model is established by using the finite element software MIDAS-GTS.The numerical simulation analysis on the influence of the construction of the newly-built tunnel on the railway subgrade is carried out,so as to obtain the quantitative results of the overall settlement and differential settlement of the railway subgrade.In order to minimize the adverse effects of surrounding rock deformation and stratum loss caused by the tunnel construction on the railway,some engineering suggestions and control measures are put forward.