| The area around Wawu mountain hydropower station in Hongya County is one of the key areas which have to emigrate their residents due to the construction of Wawu mountain hydropower station, and at the same time which are slops-stricken areas. Many slops may be happened deformation, even instability damage , resulting from inducements of complex geological environment,large-scal projects construction and long-time raining, will block traffic, seriously threaten the properties and lives of its local people , as well as the progress of emigration there once it loses its stability. Many slops in this site are Quaternary system ice-water accumulational slops or ice-lake accumulational slops which have special engineering characteristic. So to speed up the progress of dealing with geological disasters in Wawu mountain hydropower station area and guarantee smooth emigration there, comprehensively tackling slops in this area can't be delayed any more.Slope stability analysis and treatment study are the core problem to slope engineering research. This paper has systematically analyzed geologically disastrous body's current situation and its contributing factors based on in-depth understanding its special geology, environment, engineering conditions and related materials in this area. According to the features of slops in this area, using scene investigation, laboratory soil test, numerical calculation, the theoretical analysis and project selection, and combining with specific examples of slope, there is a study on the comprehensive treatment of the area slope. The main contents and results attained are as follows:(1) Principal means of the research is field investigation. All the dangerous points in study area are investigated one by one, and the serious dangerous points need field sampling for soil tests, in order to determine the field geotechnical physical properties, mechanical properties, and water-physical properties . The paper grasps the slope's engineering geological conditions by using all relevant information existing now, and puts forward to the influence factors of slope stability.(2) In study area, the rainfall is one of the main influence factors of the stability of slope.The stability checking computations in slight saturate slope doesn't consider the influence of the water pressure strength of hole, because it isuseful to the stability of slope there is suction in saturate soil. But rainfall make containing water in soil body increase, glue and gather strength, interior angle of friction and suction reduce, thus reduce resist shearing force of soil body at whole; and make weight of slight saturate slope increase, it bring glide force up; at the same time, produce scepage force. These factors are disadvantageous to stability of slope. According to investigating and analysis, rainfall, water table have close relation with stability of slope, but people were still very insufficient to understanding this kind of relation in the past. Thesis analyze the causes that rainfall bring out slope lose, set up quantitative analysis model. According to the analysis model, study the relation between rainfall and the slope stability. The result shows, that the slope having high stability safety factor, may lose mainly part stability in the initial stage of rainfall, and that the slope having low stability safety factor, may lose part stability on the initial stage of rainfall, or may lose wholly stability after rainfall for a long time too.(3) On the basis of understanding the basic principle,methods and comprehensive control measures of slope control in study area, this paper researched landslide comprehensive program of public order measure from prevention and treatment aspect.Three kinds of comprehensive schemes of public order are proposed and analyzed features and adaptation of each one respectively. In the end, it clarified the project combined anti-slide with drainage and interception system is the best method of treatment in the landslide by comparing them .
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