铁路隧道在高地应力作用下的有限元分析

Finite Element Analysis of Highland Stress on Railway Tunnel

针对设计为两座单线的隧道,其围岩主要为V级围岩,地下水类型以基岩裂隙水为主.通过采用弹塑性理论及ANSYS有限元分析方法,对实际工程铁路隧道开挖及初期支护过程进行三台阶开挖下的三维仿真模拟分析,并对软岩隧道的初期支护施工的优化提供了改进方案.对比模拟数据与各断面实际量测数据,均在15天左右趋于稳定,结果证明该模型的建立是可行的.所得结果对隧道初期支护施工有一定的参考.

It aims at designing the two seat single-track tunnel,where the surrounding rocks are mainly slates,with sandstones and clips in carbonaceous slates,and the types of groundwater give priority to bedrock fissure water.By using the elastic theory and ANSYS finite element method,the actual engineering of the railway tunnel was simulated and analyzed.From the simulated data and the actual measured data of each section,the tunnel is stable for 15 days or so.The model is proved feasible;to a certain extent,it can guide the construction significantly.