DaDu River GanHaiZi Accumulation Of Body Study On Formation Mechanism And Stability

Danba Hydropower Station is located in Ganzi Tibetan Autonomous Prefecture in Sichuan Province Danba County. Planning at the beginning of the proposed dam site on behalf of the water 400m downstream ShuiKaZi Department on the main stream of the River. Dam (ShuiKaZi) and the underground powerhouse of the county seat away from the Danba 17km and 0.7km. Dam (ShuiKaZi) and the underground powerhouse of the county seat away from the Danba 17km and 0.7km. Hydropower is the main stream of DaDu River hydropower planning "three-base 22" of the first eight power plants. Control site drainage area 45528km2, multi-year average flow of 623m3 / s, the beginning of normal water to be 2040m, under normal water level capacity of 2.69×108m3, maximum height of 108m, the use of gap power station 188m, to be installed in early 156×104kW.GanHaiZi accumulation of body away from the proposed hydropower station downstream from Danba only about 1km, distance from the dam is only about 5km. GanHaizi landslide on the right bank of which stem volume of about 3.58×108m3, is located in BaWang dam (the dam) downstream about 650m on the right bank of River Department, along the river was irregular distribution of the oval, before and after the elevation of edge of 560m. Accumulation of body length from east to west 1200 ~ 1435m, north-south width of 2260m, an area of 298.4×104m2, the average thickness of about 120m, the size of about 3.58×108m3. The other side of stem Gaihaizi landslide,The other side of stem haizi landslide, GenBaGou the accumulation of body volume as high as 3840×104m3. The main causes of the accumulation of body, there are two views, one for the right bank of the river Ganhaizi landslide debris accumulation; another view from the left bank, has nothing to do with stem haizi landslide. Due to causes directly related to the dry study of various aspects of landslide Ganhaizi work, there was a need for its characteristics, causes and the relationship between stem Ganhaizi landslide depth and detailed analysis.Research has shown that Danba Station area near the dam site, one of the main engineering geological problems of the stability of landslide is very large, in particular, Bawang Department ditch 650m downstream weir Ganhaizi stem the accumulation of body side, the distribution area of wide side large, and the landslide in the upper part of a group of large-scale development of tensile cracks, deformation is obvious. GanHaizi side weir once the accumulation of physical instability, power plant operators will inevitably have an impact, so a huge accumulation of body condition of its stability? Once buckling down, the damage size and the type and extent of harm and how? These not only related to the suitability of the dams and reservoirs can be expected to play the normal considerations and choices, is more concerned about whether the lower reaches of its buildings, facilities and people's lives and property of such a threat, causing harm. Therefore, to ascertain the cause of a huge accumulation of body mechanism, a reasonable assessment of its stability, science to predict the harm it is very necessary.In this paper, the accumulation of body as the research object, the integrated use of the geological history of the method causes, discrete element method and limit equilibrium methods and so on, through the context of environmental geology, landslides and the evolution of developmental conditions, the accumulation of body structure and characteristics of deformation and damage research, analysis accumulation of physical boundary conditions. Formation mechanism from the accumulation of precursors and impact of factors such as aspects of deformation and failure analysis have been signs of the scope and extent of the accumulation of physical grasp of macroeconomic stability and local stability of the overall situation. Through the limit equilibrium analysis, on the accumulation of body and local stability of the overall forecast. Finally, in the form of accumulation of damage and destruction of body size based on the analysis, the effect of its project's conclusions and recommendations.