暴雨情形下含裂隙土质边坡的瞬态稳定性

以山西省安太堡露天煤矿某地质剖面为例,采用Slide软件对暴雨情形下含裂隙土质边坡的稳定性进行分析,确定边坡潜在滑动面的位置,合理布置促使边坡发生推移式滑坡和牵引式滑坡的裂隙,应用MIDAS/GTS软件模拟分析降雨条件下的坡体应变规律和边坡稳定情况。结果表明:随着降雨入渗,边坡塑性区自坡脚向上部不断发展,直至形成贯通的塑性区;在持续降雨1.5 d时,边坡的稳定性最差,存在表层滑动可能;所提出的边坡裂隙布置方式更能反映含裂隙土质边坡在暴雨情形下的实际情况。

Transient stability of soil slopes with fissures under rainstorm condition

Taking a geological profile of Antaibao Coal Mine in Shanxi Province as an example,the stability of the soil slope with fissures is analyzed by using the software Slide.The position of potential sliding surface is determined,and then the slope fissures that lead to trust landslide and tractive landslide are reasonably arranged.The strain rules and stability of the slope under rainstorm condition are simulated by means of the software MIDAS/GTS.The results show that with the infiltration of rainfall,the plastic zone of the slope develops continuously from the toe of the slope upward until the formation of the coalescent plastic zone.The stability of the slope is the worst when the rainfall infiltration lasts for 1.5 days,and shallow sliding may occur.The proposed arrangement mode of fissures for slopes can better reflect the actual situation of soil slopes with fissures under rainstorm cases.