软硬互层岩滑坡的变形特征及稳定性分析——以湖南郴州S215公路K3+172~K3+252段滑坡为例

Deformation Characteristics and Stability Analysis of Soft and Hard Interbedded Rock landslide--Taking the Landslide at K3+172~K3+252 Secetion of S215 Road Chenzhou,Hunan Province as an Example

在软硬互层岩石中,地质灾害极易发生。本文以S215公路K3+172~K3+252段滑坡为研究对象,分析了该滑坡的空间形态、物质组成和变形特征,采用极限平衡法,选择折线型滑动模型,在两种不同工况下对其稳定性进行了计算,最后对滑坡稳定性进行了评价。滑坡在天然工况I条件下为基本稳定状态,在暴雨工况Ⅱ条件下为不稳定状态。提出了多级抗滑桩工程、截排水工程、坡腰平台复绿工程、道路路面修复工程和监测工程相结合的综合防治工程,为该滑坡的后期治理提供了依据。

In soft and hard interbedded rocks,geological disasters are very easy to occur.About landslide at K3+172~K3+252 section of S215 road,spatial morphology,material composition and deformation characteristics were analyzed.Its stability under two different working conditions was calculated and then evaluated with folded line sliding model by limit equilibrium method.The landslide is basically stable under natural condition I and unstable under rainstorm conditionⅡ.A comprehensive prevention and control project combining multistage anti-slide pile engineering,drainage engineering,green engineering,road reconstruction engineering and monitoring engineering is reliable for the later treatment.