Qiao Yard Landslide Stability Analysis And Treatment Design

The extroardinary rainstorm in 2013 July 18^thinclud landslides in Qiaojia yard shanjiao village in Yongsheng country LeiBo country,collapse in Ergengya and the settlement point behind back mountain of ShunHe village deformation failure.And the results that the residence of Qiaojia yard in ShanJiao village were damage to different degress.The collapse in ErGengYa caused one house seriously damaged,one people injured in that disater.Another rainstorm occurred in August 24^th,causing the landslides deformation accelerated and two houses completely destroyed,seven houses were waste to residence,and other 26 hourse different degree cracking and deformation.In this paper,Qiaojiayuan landslide as the research object,the use of engineering geological survey,combined with drilling,trench exploration and material Exploration and exploration methods to identify the landslide geological environment conditions,landslide structure and deformation characteristics,in this Based on the analysis of the mechanism of the ancient landslide and its recent resurrection mechanism,the stability of the landslide And then studied the landslide treatment scheme.Achieved the following main results:?1?The ancient landslides of Qiaojia Yizi are developed in the slow-moving bedding slopes composed of sand and shale interbeds.The formation mechanism of the landslide is creep and taper,and the weak mud-Deformation of the bottom slip surface.?2?The resurrection deformation of the landslide is mainly the transitional type,and its deformation is characterized by the curvature of the trailing edge circle,the arrangement of the fissures on both sides and the bulging uplift of the front edge.?3?According to the structure of landslide and the characteristics of deformation and failure,combined with the situation of rainstorm and human engineering activities,the reasons for the resurrection of landslide are analyzed.?4?On the basis of qualitative analysis,the stability of landslide is evaluated by limit equilibrium method and numerical simulation.The results show that the landslide is in steady state under the condition??natural condition?,and the landslide is in the unstable state under the condition II?weight+rainstorm?.Under the condition??self weight+earthquake?And the landslide is in a stable state.The landslide is in a stable state under the condition I?natural condition?,and the landslide is in a stable state under the condition II?self weight+rainstorm?.Case??self weight+earthquake Working conditions?under the landslide in a stable state.?5?According to the landslide structure,the resurrection reason and its stability condition,the comprehensive control measures of the anti-slide pile retaining structure combined with the surface drainage project are selected.