| Zhong Cun landslide locate in the eastern of Shan Yang town.In recent years,long-term of rainfall and the landslide slope cutting lead to instability of landslide,threated residents in lower part of the landside.Especially landslide activities make people panic,affect social stability.To analysis the landslide stability and research the management of the landslide is very important on the practice and theories.Based on geological exploration,through theoretical analysis and numerical simulation,the stability of soil slope is studied,and the law of stress and deformation of soil under different conditions is analyzed.Based on that,effective prevention measures are put forward.The main contents and conclusions are as follows:(1)Combined with previous geological data and field investigation,the hydrogeological characteristics of landslide area were analyzed.According to the different characteristics of landslides,it was divided into two districts.(2)Chosen Janbu method and transfer coefficient method calculated the stability of landslide on the natural state condition and saturated condition.Calculations showed that,this landslide was in the marginal steady state on the natural state condition,but it was at the non-steady state under the saturated condition.But,the rainy weather may put it into an unstable state and cause landslides.(3)Three numerical analysis models of complex landslide geological profile are established by CAD,and the distribution rules of stress,displacement and plastic zone are studied by numerical simulation.The stability of soil slope was evaluated by stress-strain curve.Put forward in the natural state,the horizontal displacement and plastic zone are small,and Under the action of rainfall,plastic zone appears in soil mass at the soil-rock interface,the downward slide trend are obvious.(4)Through theoretical analysis and numerical simulation,put forward the treatment plan for the reference of the corresponding projects. |
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