某铁路隧道进口边坡稳定性分析及优化设计

Stability Analysis and Optimal Design of a Railway Tunnel Slope During Route Selection

以某铁路隧道进口边坡工点为例,研究了边坡在不同隧道进口标高、不同情况(边坡未开挖、开挖未加载、开挖后加载)、不同工况(天然工况、暴雨工况、地震工况)、不同破坏模式(内部滑动、复式滑动、沿接触面滑动)时的边坡安全系数,将隧道的开挖和边坡的卸载相结合,有效减小了边坡下滑荷载,优化了治理工程设计方案,保障了工程的安全,可为同类型工程在选线、边坡设计中提供参考。

Taking a railway tunnel entrance slope construction site as an example,the slope safety factor at different tunnel entrance elevation,different conditions(slope not excavated,excavation not loaded,loading after excavation),different conditions(natural conditions,rainstorm conditions,earthquake conditions),and different failure modes(internal sliding,multiple sliding,sliding along the contact surface)was studied.The combination of tunnel excavation and slope unloading effectively reduces the slope sliding load,optimizes the design scheme of the treatment project,ensures the safety of the project,and can provide reference for the same type of projects in route selection and slope design.