降雨入渗对湿陷性黄土边坡稳定性影响

Influence of rainfall infiltration on the stability of collapsible loess slope

在降雨环境下,湿陷性黄土边坡容易出现失稳现象。基于陕西某黄土边坡评估工程对降雨作用下湿陷性黄土边坡稳定性进行评估,具体结论如下:对于湿陷性黄土边坡而言,随着降雨时间的增加,水体入渗的深度逐渐增加,边坡安全系数逐渐降低;在渗流作用下,土体强度衰减比越小,边坡的安全系数越小;为了保证湿陷性黄土边坡稳定性,应该注意边坡坡面的防水,防止降雨入渗削弱边坡稳定性。

Under the rainfall environment,the collapsible loess slope is prone to instability. Based on the evaluation project of a loess slope in Shaanxi Province,the stability of the collapsible loess slope under the effect of rainfall was evaluated. The specific conclusions are as follows: for the collapsible loess slope,with the increase of rainfall time,the depth of water infiltration gradually increases,and the safety factor of the slope gradually decreases.The smaller the strength attenuation ratio is,the smaller the safety factor is. In order to ensure the stability of collapsible loess slope,it is necessary to pay attention to the waterproofing of side slope surface to prevent rainfall infiltration and weaken the stability of slope.