Exploration of Slope Stability Under Slope Foot Excavation Conditions
[Purposes]To investigate the impact of excavation at the foot of a slope on slope stability,sta-bility evaluation of hidden danger points on the slope is conducted based on numerical simulation.[Methods]This paper statistically analyzed the characteristics of geological hazard potential points in Nanqiao District,Chuzhou City,Anhui Province,and divided them into six types of slope models with dif-ferent slopes.Gradient excavation was carried out for each type of model,and a variety of excavation con-ditions were established.Combined with the Finite difference method and the finite element strength re-duction method,the slope plastic zone status,slope displacement,and factor of safety under each condi-tion were simulated and calculated.[Findings]At a slope of 30°,the factor of safety decreases by 22.28%after 10m excavation;When the excavation footage is 4m,the slope increases from 15° to 40°,and its factor of safety decreases by 60.18%,the largest proportion;The influence of slope on factor of safety is greater than that of excavation footage.When the excavation reaches 10m,both shear failure and tensile failure are occurring inside the free face,with a higher probability of instability than at the top of the slope.As the excavation footage increases,the maximum settlement and horizontal displacement gradually occur in the upper part of the free face.[Conclusions]The research results reveal the law of slope stability changes during excavation,which provides reference for the prevention and control of simi-lar geological disasters.
FLAC3Dstability analysisfactor of safetygeological hazardsbuilding houses by cutting slopes
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