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在豫西高速公路滑坡地质环境条件勘察的基础上,采用极限平衡法对公路边坡稳定性进行了计算,结果表明,岩土在非饱和状态下,边坡处于稳定状态,而在饱和状态下,边坡处于不稳定状态。采用FLAC3D数值模拟的方法,分析了不同水文地质条件下边坡的应变和位移,结果表明,岩土在非饱和状态下,边坡剪切应变增量集中区范围小,边坡位移量小,边坡处于稳定状态;在饱和状态下,边坡内形成了一个相对贯通的剪切应变增量集中区,边坡位移量较大,边坡处于不稳定状态。综合分析认为,在持续强降雨条件下,高速公路边坡水文地质条件恶化是产生滑坡的主要原因。
On the basis of geological and geological survey of landslide in western Henan Province, the stability of highway slope is calculated by the limit equilibrium method. The results show that under the unsaturated condition, the slope is in steady state, while in the saturated state , The slope is in an unstable state. The FLAC3D numerical simulation method was used to analyze the strain and displacement of the slope under different hydrogeological conditions. The results show that in the unsaturated state of the rock and soil, the scope of shear strain increment of the slope is small and the displacement of the slope is small The slope is in a steady state. Under the saturated condition, a relatively concentrated zone of shear strain increment is formed in the slope. The displacement of the slope is larger and the slope is in an unstable state. According to a comprehensive analysis, under the conditions of continuous heavy rainfall, the deterioration of hydrogeological condition of the highway slope is the main reason for the landslide.