Study On Sensitivity Degree Of Liuxing Ridge-Tongxin River Landslide Stabilizing Influencing Factors

The stability analysis of soil slope is one of important research topic in the field of geotechnical engineering at home and abroad.Slope stability has many influencing factors, and the impacting factors of safety are various and uncertainties, it is hard to quantitative each impact factors on the slope stability contribution in the design process, so the design personnel cannot complete mastery slope stability is the occurring mechanism and analyzing slope objectively. At present, the prevention and control of the slope slide is still a very difficult task, so it is very important to analysis the influence factors of slope stabilityThrough definition of sensitivity, push to make calculation formula of simple soil slope; as landslide of Liuxing ridge-Tongxin river in Chenzhou City for example, by the limit equilibrium analysis method deduce the sensitivity of the slope impact factor (slope highh、Slope Angle β、soil unit weightγ、soil cohesion c、soil angle of internal frictionφ、water tableh、slope top loadq、and earthquake intensityn) and establish its safety coefficient with regression equation; through the impact factor analysis to determine the sensitivity of the landslide treatment measures, and by finite element software Plaxis simulate the process of slope treatment, validating the slope stability state. Through the above content, conclusions as follow:(1)Through the analysis of liuxing ridge-tongxin river landslide, we know that:soil cohesionc、soil angle of internal friction φ increase are advantageous for Slope stability; but slope high h、Slope Angleβ、soil unit weightγ、water table hw、Slope top load q and earthquake intensity n ncrease are disadvantageous for Slope stability; slope highh、 Slope Angleβ have the greatest impact on the slope stability.(2)The changes of influence factors with the sensitivity of the slope stability is as follow:slope Angle β> slope high h> earthquake intensity n> slope top loadq> water table hw> soil angle of internal frictionφ>soil unit weightγ>soil cohesionc.Slope safety coefficient have the largest sensitivity with the slope angle, but Slope safety coefficient have the smallest sensitivity with the related parameters of silty clay with gravel.(3)Through each impact of the iconic sensitivity analysis, design of targeted on the main influence factors of the processing, can make the project will both economical and security.