Treatment Research On Dr2 Endangered Rock Mass Of Suofengying Hydropower Station

The stability of slope question is one of the common problems in the water conservation hydroelectric project, in the past water conservation hydroelectric, the storehouse district, the dam area landslide accident occurred many times in our country engineering construction, it has caused massive personnel casualty and significant economic loss. Along with the strategic implementation of "west development" and "west electricity large-scale deliver to east", our country, the extra large type hydropower stations begin one after another, the slope stability was deciding the project feasibility directly, is affecting the project construction investment and the safe operation. like the Sanxia, Long Tan,Xiaowan, Laxiwa, Jingping and so on projects all has the serious high stability of slope problems. High slope geologic structure quite complex, the affects factor also very to be many, causes the technical difficulty with the scale of processing project unprecedented.Suofengying hydropower station installed capacity 600MW, "west electricity deliver to east" is the priority project in our country. The Dr2 Endangered Rock place right dam shoulder and above in the generating system water inlet place of the T₁m¹ calcareous steep rock mountain, is apart from right dam shoulder 140m, distributed elevation 900¹080m. Between 960～1070m the T₁m¹ calcareous rock steep cliff slope is bigger than 70°, forms partially hangs upside down the slope; The rock character mainly is the T₁m¹ pessimistic thin layer to the center heavy film calcareous rock, the white clouds nature calcareous rock, the base is Jiujietan (T₁y³) mudstone; The danger crag body interior band grows, main J1-J4 clamps the stratification plane possibly for the danger crag body slip plane; The crevasse distribution is multitudinous, three groups of superior potential surfaces the endangered rock division are five parts; The total bulk of Dr2 Endangered Rock reached 58.6×10⁴ m³, is the biggest scale in Suofengying hydropower station dam site area and the harm also is the most serious danger, its stability threatens the dam and the water inlet security directly.According to the geological situation and boundary condition of Suofengying Dr2 Endangered Rock which the geological prospecting verified. This article analysis the endangered rock form mechanism and...