Study On The Surface Rupture Mechanism And Slope Stability Of The Strong Deformation Zone In Ludian

In Southwest China,frequent earthquakes,complex geological conditions,water resources is extremely rich.But the economy is relatively backward in the southwest,hydraulic construction is the strategic measures to support the development of regional economy,but also bear the whole national economy.The role of the construction of hydropower station in the deep valley area,complex geological conditions,geological environment fragile,major engineering geological problems occurred in the construction,threatening the safety and economic construction of the hydropower project construction and operation and the surrounding area.The earthquake in the Mountain hilly area mainly induced landslide,collapse,debris flow and slope of secondary geological disasters,shattering mountains is the material basis of potential geological disaster of earthquake,geological disasters after the earthquake has significantly,especially in the area of hydropower project is extremely easy to cause large scale dangerous geological disaster.In August 3,2014 16,6.5 earthquake occurred in Ludian County of Yunnan Province,a large number of induced collapse and landslide geological disasters,resulting in a large number of casualties and property losses.The more violent earthquake disturbance by the upstream rock hydropower project Redstone Wangjiapo en side,surface rupture serious,great deformation,pose a serious threat to the entire hydropower project the construction and operation.The earthquake Wangjiapo strong deformation zone as the research object,the characteristics of deformation zone of surface rupture,the composition and structure of the rock mass material detailed investigation and analysis,to systematically the strong deformation zone of surface rupture mechanism and slope stability are analyzed.The main research contents and results are as follows:(1)Wangjiapo strong deformation zone surface rupture of a total of 72,to coordinate,the starting point of each surface rupture direction,length,width,visible depth,carried out a detailed investigation,the wrong height and fracture filling situation analysis,summed up the spatial distribution of surface rupture zone Wangjiapo development characteristics,signs of deformation etc.(2)Through the detailed geological exploration,drilling and logging data,the material composition analysis and the classification of rock mass structure are obtained.(3)Based on the analysis of the mechanism of surface rupture in the strong deformation zone,it is considered that the main causes of the surface rupture are topography,rock and soil structure,seismic dynamic response,continuous rainfall and late accumulation(4)Combined with the surface displacement monitoring data and using FLAC3 D numerical method of natural and heavy rain condition of slope deformation stability analysis,FLAC3 D model results show that the deformation only exists in the fault zone to full weathered rock of shallow and H2 residual wall,deformation and monitoring data and field basic qualitative judgment well,the deformation and failure of slope is mainly affected by the fault zone,slippery slope rock belongs to the local surface,there is no problem of overall stability.