Reservoir Bank Slope Deformation Analysis Of New Badong City

The Three Gorges Reservoir has been used for water storage since the year 2003, however, the geological problome of bank slope in Three Gorges Reservoir area is still not completely solved. It is because The Three Gorges Reservoir area is a region prone to geological hazards such as landslides, and especially The new Badong city which is a disitrict with the most complicated geological conditions. The third Member of Triassic Badong Formation is one of the tipical landslide formation zone in The Three Gorges Reservoir area. There exists plenty of large landslides, i.e.the tipical slopes Huangtupo landslide, Zhaoshuling landslide mostly happened there. The slope stablity issue keeps to be the significant problem threating lives and preoperty of local people, therefore the research on Reservoir bank slope deformation stability of new Badong city is with theoretical value and social significance.In the thesis, with the study of new Badong city topography, lithology, geological structure and other characteristics, statistical analysis of large-scale landslide based on data collection, the field suvey, and other work has been made as for the research of landslide deformation mechanism of rock in the area, a typical slope, a large-scale landslide in date trees has been taken into evaluation and numerical sitmulation to analyze its stability under different conditions. Through the above-mentioned research, the conclusions can be drawn as follows:(1)According to the statistical analysis of large landslides and deformed bodies in new Badong city via the field suvey, data collection, bank rock slope of the third Member of Triassic Badong Formation in the study region is main consist of Weak interlayer material, mostly clay, silty clay which mainly composed of chlorite, illite, kaolinite, ymontmorillonite, quartz, feldspar and calcite.(2)Combining with initial efforts of processors, the formation of the landslide are analyzed and the research on the landslide slip zone evolution is carrying out. From the research it includes that main factors influencing slope stability and correspondingly of the reservior rock include Topography, geological structure, Stratum lithology, water level fluctuation, rainfall, earthquakes and ther human project activities, in accordance with landform and geologic formation etc.(3)Selecting dates landslide in the study area as the research object, its stability is analyzed under different conditions by the limit equilibrium principle (briefing method, Morgenstern-Price method, unbalanced thrust transfer coefficient), and landslide displacement and stress distribution situation combined with FLAC3D numerical simulation are analyzed. The results showed that the reservoir water level change, earthquakes and rainfall of the area have a great effect on the stability of landslides.