Study On The Influence Of Spatial Distribution Of Soil On Slope Stability

Based on the recent indefinite method which is well accepted in the project of practical slop, without considering the Randomness, Variability, and the Distribution Form of Probability for the the separation of parameters of soil. As a result the phenomenons that the slop lose stability while its safety factor is over 1.0, the slop is stable while the safety factor is less than 1.0, and two slops with same safety factor but their stability is different. This paper aims at introducing some uncertain factors, such as the Coefficient of Variation, Relative Distance, the Separation of Parameters, and the Combination of soft-hard layers. Then combine the determinate and indefinite methods to study the the influence of spatial distribution system of rock-soil on slope stability. The main studying results are as followings:(1) This thesis summarizes the spatial distribution rule of slope: one is the Randomness of spatial distribution of soil body’s parameter spatial distribution (the Variability of spatial distribution of soil body’s parameter spatial distribution; the randomness of probability of soil body’s parameter spatial distribution;) and the other is the distribution of the slope in layers.(2)The Randomness of spatial distribution of soil body’s parameter has some impact on th e stability of slope. If coefficient of variation and related distance are increased, there will be m ore impact on the stability of slope which has more chance for slope losing it is, stability and can lead to that fact that the impact of related distance becomes bigger than the coefficient of variation has on the stability of slope.(3)When soil parameter follows different pattern of probability, the probability for slope 1 osing stability is different. The probability for slope losingstability in turn are normal distributio n , the combination of internal friction angle normal and cohesion logarithmic normal ,the combination of cohesion normal and internal friction angle logarithmic normal and logarith mic normal distribution.(4)The combination of soft-hard layer has a great influence on the stability of slop. The soft-hard separation form of the safety factors range from: TC 2 (the smallest one), TC4,TC5, TC3, TC1, TC6 (the biggest one).