不同影响因素对库岸边坡稳定性的影响研究

Research on the Influence of Different Influencing Factors on the Stability of Reservoir Bank Slopes

以某大型河岸边坡为研究对象,通过室内试验,得到边坡土体的土水特征曲线、渗透系数曲线及抗剪强度参数,并通过有限元软件,模拟不同工况下河岸边坡稳定系数的变化,探究不同影响因素对库岸边坡稳定性的影响。结果表明,边坡土体的细粒含量越高,稳定性越低,当细粒含量为100%时,边坡处于失稳状态;降雨叠加水位骤降工况下的边坡稳定系数均小于仅水位骤降工况下的稳定系数,且在这两类工况下河岸边坡均处于基本稳定状态。

This paper takes a large-scale riverbank slope as the research object,through the indoor test to obtain the soil-water characteristic curve,permeability coefficient curve and shear strength parameters of the slope soil,with the help of Geo-studio software to simulate the change of the stability coefficient of the riverbank slope under different working conditions,and explore the influence of different influencing factors on the stability of the reservoir bank slope.The results show that the higher the fine-grained content of the soil body,the lower the stability,when the fine-grained content is 100%,the slope is unstable;rainfall superimposed on the water level plunge conditions of the slope stability coefficient are smaller than the stability coefficient of the water level plunge conditions only,and the riverbank slope is in a basically stable state in the two types of working conditions.