开挖台阶对增建二线路基稳定性的影响分析

Influence Analysis on Subgrade Stability of Newly-built Second Line Caused by Excavating Slope Step

本文结合干武二线工程简要阐述了增建二线路基填筑过程中挖台阶对路基整体稳定性的影响.借助有限元模拟分析法,对挖台阶与不挖台阶,挖0.5m、1 m以及2 m宽度几种不同工况进行计算分析,得出挖台阶施工对增加路基整体稳定性有较好的效果,并结合现场施工情况通过分析与对比,选定挖1 m宽台阶方案为最优方案.

Based on the second line project of Gantang-Wuwei Railway,the author briely expounded the infuence on the overall stability of subgrade during digging steps in the flling process of additional second line subgrade.By finite element modeling method,the calculation and analysis were carried out in terms of different working conditions,including digging step and non-digging step,digging0.5 m,1 m and 2 m width,It is concluded that digging step construction had better effect on increasing the overall stability of subgrade.According to the actual project condition,the scheme of digging 1 m wide step was Selected as the optimum case.