渗流作用下不同结构土质边坡稳定性模拟

Simulation Study on Stability of Soil Slopes with Different Structures under Seepage

边坡稳定性分析是预测由于各种载荷和环境条件引起的地层沉降、变形和滑移的重要方法。在堤坝中,水体的渗流作用会改变岩土体的力学特性,尤其是土壤的剪切强度。为了分析土石坝在渗流作用下的边坡稳定性,用剪切强度折减法对坝体结构的安全系数、滑移面和位移场进行计算,讨论不同坝体结构在渗流作用下的边坡稳定性,结果表明:剪切强度折减法能够用于渗流作用下的边坡稳定性分析,渗流作用能够劣化土壤的剪切强度。在渗流作用下,坝体结构对边坡稳定性有显著影响,临水侧边坡角α比非临水侧边坡角β越小,边坡越稳定。

Slope stability analysis is an important method to predict stratum settlement,deformation,and slip caused by various loads and environmental conditions.In the dam,the seepage of water will change the mechanical properties of rock and soil,especially the shear strength of the soil.In order to analyze the slope stability of the earth rock dams under seepage,this study considers the shear strength reduction method to calculate the safety factor,slip surface,and displacement field of the dam structure and discusses the slope stability of different dam structures under seepage.The results show that the shear strength reduction method can be used to analyze the slope stability under seepage.Seepage can degrade the shear strength of the soil.Under the action of seepage,the dam structure has a significant impact on the slope stability.