某土质不稳定斜坡稳定性分析和评价

Stability analysis and evaluation of a soil unstable slope

通过对北京市某土质不稳定斜坡的物质组成和结构特征分析,本文采用瑞典条分法,利用GeoStudio2018-SLOPE/W软件计算,里正软件验证,求出斜坡在天然、地震和暴雨三种工况下最危险滑动面的位置、形状、最小稳定性系数和所处状态。结果表明:不稳定斜坡在天然状态下处于基本稳定-稳定状态;在地震工况下,斜坡处于不稳定-基本稳定状态;在暴雨工况条件下,随着降雨入渗,斜坡处于不稳定状态,可能发生变形和局部垮塌。结合勘查现状和稳定性评价结果,给出相应的防治方案,以更好的维护居民财产与生命安全。

Through the analysis of the material composition and structural characteristics of a certain soil unstable slope in Beijing,the article adopts the Swedish slice method to calculatione by the Geostudio2018-SlOPE/W software,with the Li-Zheng software validation.It is concluded that the most dangerous sliding surface slope location and shape in natural,earthquake and storm three conditions.The calculation results also get minimum stability coefficient and state.The calculation results show that the unstable slope in natural state were basically stable-steady state;Under the working condition of the earthquake,slope is in unstable-basically stable state;Under the working conditions of heavy rain,with rainfall infiltration,the slope is in unstable condition,deformation and partial collapse may occur.Combined with the exploration status and stability evaluation results,the corresponding prevention and control scheme is given to better maintain the safety of residents’property and life.