暴雨工况下弃土场高边坡安全稳定性分析

文章以广昌至吉安高速公路某标段弃土场高边坡为研究对象,探讨了暴雨扰动下弃土场高边坡的安全稳定性,运用毕肖普(Bishop)法、摩根斯坦-普赖斯(Morgenstern-Price)法和瑞典圆弧(Ordinary)法计算,使用Geoslope软件模块,建立边坡分析模型,模拟分析连续1 h、6 h、24 h、72 h的极端暴雨工况下,弃土场高边坡的稳定性。结果表明:天然工况下处于稳定状态的弃土场高边坡,在暴雨工况下,内部开始出现微小滑弧,随着雨水内渗,滑弧逐渐增大,而后形成清晰滑面,滑面呈S型,形成清晰滑面后,降雨会使滑面面积继续增大,贯通之后边坡滑塌。

Safety and Stability Analysis of High Slope of Abandoned Site under Rainstorm Conditions

In order to study the safety and stability of high slope of abandoned site under storm disturbance,Taking the high slope of abandoned soil yard in a section of Guangchang-Ji'an expressway as the research object,Appling Bishop、Morgenstern-Price and Ordinary to calculate,Using Geo-slope Software Module,Establishingt the Slope Analysis Model,Simulation and analysis of Extreme Rainstorm conditions for 1 h、6 h、24 h and 72 h,Stability of High Slope of Abandoned Soil Site.The results show that:High Slope of Abandoned Site in Stable State under Natural Conditions,Under the condition of heavy rain,Small sliding arcs begin to appear in the interior,With the infiltration of rainwater,The slip arc increases gradually,Then a clear sliding surface is formed,The sliding surface is S-shaped,Rainfall will continue to increase slip surface area.Slope collapse after penetration.