| Landslide is a common geological disasters, in today’s high-speed economicdevelopment in our country, human engineering activity gradually increased, coupled with theinfluence of natural factors, landslide has become the highest frequency and the most harmfultype of each kind of disaster, and increase year by year.Affect a wide range of landslide disasters, causing economic losses, casualties anddevastation, and destruction of the human environment. Yinghu Landslide is a medium-sizedshallow soil landslide in Liu Shui Zhen Yao tou Cun, Hanbin District, Ankang City, directthreat the villagers’ houses after landslide, town government indirectly threaten water, familyplanning centers, supply and marketing cooperatives and other enterprises and Kiln Village,town water life and property safety of the villagers.In this thesis, the town of Yao tou Village Yinghu water slide for the study, in the analysisof geological background and based on the forming condition of the landslide, combination ofqualitative analysis and quantitative analysis, to study the stability of the Yinghu landslide,and carries on the scheme selection and the optimization of design, the main research results:(1) According to the geological environment background, landslide characteristics,combined with the formation conditions of landslide in the basic conditions includetopography, lithology and rock mass structure and trigger conditions including water,earthquake and human engineering activities analysis, get the landslide front edge shear stressconcentration by use of the finite element theory, landslide along the slope of the maximumshear stress inside the main body with a weak distribution，slope toe cut export has themaximum shear stress, these factors are the main causes of landslides.(2) The stability of the landslide qualitative and quantitative evaluation. Qualitative thatthe overall slope is less stable state, local in a critical state, in unfavorable conditions theremay be partial or total slide. Quantitative analysis using limit equilibrium theory (transfercoefficient method) and reliability theory (Monte Carlo method) were calculated andnumerical stability of the landslide.(3) By means of transfer coefficient method for stability of landslide in the threeconditions of four cross-sectional stability calculation derived: weight+perennial water level of323.00m in the state of stability coefficient of the Fs∈1.00,1.39, the landslide in lessstable state; In weight+perennial water level323.00m+50years in a heavy rain conditionstability coefficient of the Fs∈0.78,1.01], the landslide basic is in unstable state, has thepossibility of a potential landslide. In weight+perennial water level323.00m+earthquakestability coefficient under the condition of the Fs∈0.95,1.20, landslide in less stable state.(4) Using the Monte Carlo method and the use of Geo-studio software to analysis of thelandslide results: Weight+perennial water level of323.00m landslide is less stable, thereliability β=1.551, stability coefficient Fs=1.1473; In weight+perennial water323.00m+50year in a heavy rain conditions, landslide is unstable, the reliability β=-1.945, stabilitycoefficient Fs=0.82173; In weight+perennial water level323.00m+earthquake stabilitycoefficient under the condition of the Fs=1.022, the landslide body is less stable state.(5) Proposed three Yinghu landslide prevention programs: Anti-slide pile+cut,drainageprogram; Prestressed anchor frame beam+dry stone revetment+cut,drainage program,drainage schemes; Cut the presser foot+fill section+cut,drainage program. Using fuzzycomprehensive judgment method to three kinds of control schemes for plan optimization, thefuzzy comprehensive evaluation method of the maximum membership degree principle, theanti-slide pile+cut drainage program is optimal prevention and treatment programs.(6) For design of anti slide pile+cut, drainage control schemes for the Yinghu landslide,and optimize the section size and length of the pile. |
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