Study on formation mechanism and deformation failure models of shatter slopes

The shatter slope is a type of secondary geological hazards under the action of strong earthquake.Its distribution is wide,its shatter deformation is serious,and its potential hazard is great.In order to thorough and systematically analyze the shatter mechanism and the deformation failure mechanism models,this paper,combined with the detail investigation to the shatter deformation and destroy phenomenon caused by "5.12" Wenchuan big earthquake,and under the condition of fully analyzed the earthquake wave effects,preliminary and systematically analyzed the mechanism of double-side slope shatter deformation.It considers that the action of body waves make slope under the alternative action of pulling-shearing strength and counter pressure strength,which quantity value and orientation change continuously.This will form pulling-shearing rending effect and potential wedge split rending effect,which is one important factors of shatter formation.At the same time,the surface wave will make the slope surfaces suffer the action of ballooning pulling force and torsion.This is still the significant reason of shatter deformation.All these will lead to the stress field of slope body under the process of continuous dynamic variation,and will make the shatter deformation become more serious.On the basis of above,the paper still analyzed and concluded the deformation failure mechanism models of slopes in the process of strong earthquake.It thinks that the deformation failure mechanism models have four typical representation forms,which are rotating and fracturing model,rotating and shearing-sliding model,ballooning and fracturing model,and sliding and fracturing model.The study results will provide vigorous reference for analysis of shatter slopes stability and reconstruction after earthquake and hazard resistant and reduction.