| Checking computations of Stability of slope is the key of design of slope by the highway, if you want to improve stability of the slope by the highway designed. Primary problem is choose suitable analysis method and fetch rational parameter. Analysis result of the definite value analysis method used in the project at present doesn't correspond to the steady real work state of slope, it's income safety coefficient and real security competence of slope stabilize exists certain error. Because definite value analysis method neglects influence to engineering structure of random existing of the effect of loading (slippery moment) and resists strength (resist the slippery moment). Reliability analysis method have considered the comprehensive influence of the uncertain factor, So it's analysis result accords comparatively with the real work state that the slope is steady, is a kind of method having a bright future and being worth of popularize. But, because dependability theory involves deeper mathematics theory, and soil parameter's collection and treatment of data, dependability' calculation of index has a little trouble, Dependability method doesn't still apply extensively and isn't be popularize in practice of slope project.Aiming at existing problem in analysis calculating of slope stability at present, thesis combines slope definite value analysis method with reliability analysis method, and carries on appraisal of stability and dependability of slope, that utilizes simple and convenient of definite value analysis method, considers soil variability and uncertainty of parameter. It considers the influence of random of loading and resistance in calculating that impact on structure security of the project, closes to the real work state sloping. And when going on reliability analysis of slope stability, confirm with critical split surface using traditional definite value analysis method (namely most dangerous sliding surface), then calculate reliability index and failure probability of slope in this sliding surface. Compare with using trial method to look for critical sliding surface in the past, it reduces time of calculating greatly, improves computational efficiency, can get safety coefficient and failure probability of slope stability at the same time.Thesis vise reliability analysis method of stability analyze the stability of the simple clay slope, announce inner link of soil parameter's variability and safety coefficient, reliability index of slope in the model: (1) The variability of the soil parameter has very great influence on value of dependability index Dependability index Value appears the total trend dropped along with the variability of soil parameter increasing; When the variability of soil parameters is less, about δ<0.2, it's influence to β is more sensitive; When δ>0.3, it's influence to β reduce obviously. (2) When the combination of coefficient of variation is in different, the influence degree that received is different. Coefficient of variation of soil parameter have more heavy influenceWhen and is high all than c and is light all. (3) The sensitiveness degrees of C and to are different. The right sensitiveness is relevant to the mean value. Whether mean value of soil parameter is obviously heavy, comparatively speaking, sensitiveness obviously increases of another soil parameter to dependability index as a certain soil. (4) In the situation mat other variables keep unchanged, the sensitiveness degrees of and to are different, the sensitiveness of C to should obviously be stronger than to . (5) shows a tendency to drop when F increases. - F is different under different mean value. When other conditions are the same, to the interior angle of friction, mean value of glue and gather play a bigger role to stability and dependability of slope.In the South:, the rainfall is one of the main influence factors of the stability of slope by the highway. The stability checking computations in slight saturate slope doesn't consider the influence of the...
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