瞬态渗流条件下水力特性对非饱和边坡稳定性的影响

Influence of Hydraulic Properties on the Stability of Unsaturated Slopes under Transient Seepage Conditions

土壤水分特征曲线模型对瞬态非饱和渗流条件下的边坡稳定性分析具有重要的理论意义与工程应用价值。通过水力特性试验,确定了从高塑性黏土到淤泥质砂等不同土壤的土壤水分特征曲线,得出土壤质地对土壤水分特征曲线模型的性能有较大影响;通过数值计算得出VG、K和FX土壤水分特征曲线模型比BC和E土壤水分特征曲线模型更能代表所研究土壤样本的土壤水分特征曲线,且土壤水分特征曲线模型的选择对瞬态渗流条件下边坡稳定性分析的可预测性具有重要影响。

The soil moisture characteristic curve model has important theoretical significance and engineering application value for slope stability analysis under transient unsaturated seepage conditions.The soil moisture characteristic curves of different soils from high plasticity clay to silty sand are determined by hydraulic property tests,and it is concluded that soil texture has a greater influence on the performance of the soil moisture characteristic curve model;through numerical calculation,it is concluded that the soil moisture characteristic curve models of VG,K and FX are more representative of the soil moisture characteristic curves of the studied soil samples than the soil moisture characteristic curve models of BC and E,and the choice of soil moisture characteristic curve model has a greater influence on the stability analysis of slopes under transient unsaturated seepage conditions.The choice of soil moisture characteristic curve model has an important influence on the predictability of slope stability analysis under transient seepage conditions.