An Arbitrary Shaped Slip Surface Structure And Critical Slip Surface Search Based On Minimum Potential Energy Method For Three-dimensional Slopes

There are a large number of natural and man-made slopes on the Earth's surface,they are easy to collapse under the action of external forces,landslides can cause huge property losses and casualties.Therefore,researching slope stability issues must be carried out.When the slope was destroyed,it should slid along the critical slip surface.because the mature method is lack,quantitative analysis of slope stability is still difficult.Therefore,this paper combines the National Natural Science Fund project(No.51304084)and previous work,the minimum potential energy method is used to research the critical slip surface based on arbitrary three-dimensional sliding surfaces.The main research results are as follows:(1)An arbitrary three-dimensional sliding surface construction method is established.Busbars and guidelines be generated by random methods and guideline be slide on the busbar,surface in the slop and be undergo is slip surface.Busbar and guideline generation method be optimized,slip surface control point acquisition method and microcell division method be produced,finally 8 parameters be used to control slip surface.(2)The method be used to calculate control point coordinates and produce sliding body data.Three-dimensional minimum potential energy method be used to build critical slip surface objective function.(3)By three-dimensional minimum potential energy method and program completed by myself,search critical slip surface.by examples and model test compare the conclusion of this article and conclusion of examples and model test,result shows that this method is reasonable.(4)2D and 3D sliding surface search program be produced by software MATLAB.for convenient using,the program be packaging,therefor operating staff can use it smoothly for minimum safety factor and critical sliding surface by inputting some numbers.