Study On Effects Of Different Wind Erosion For Multivariate Layered Steep Soil Slope

The deformation and destroy of slopes is one of the disasters that is the most wide,frequent and serious one in all disasters.With the national economy developed,thequantity of the engineering activities,speed and scale are becoming more and greater.The problems of the slope instability are more and more.The object of study is notonly the instability of broad batholithn slope.The problems of the slope instabilityhave been drawn much attention by more and more engineers and scholars.Especially,the problem of the deformation and destroy of high steep soil slope has been the focusand difficulty in the filed.The deformation and destroy of high steep soil slope is a complex process whichis controlled by the internal and external causes.The external cause includes rainfall,evaporation,earthquake and human's engineering activity,and ect.All the causes thatinfluence the slope decide the evolvement system and destroy pattern.So it is he key toevaluate the stability,predict the evolvement,direct the parameter choice of rockphysical mechanics and protect and renovate the slope to cognate the factors ofinducing the deformation and destroy of high steep soil slope.At present,manyscholars concentrate on the study of reservoir,earthquake,human's engineeringactivity,rainfall and evaporation and ect,which external causes influence thedeformation and destroy of high steep soil slope.However,it doesn't study deeply tothe main inducing factors of the deformation and destroy of high steep soil slope of thedry and windy area.Base on the recognition of above point of view,the typical case is the multivariatelayered steep soil slope in the Jiaohe ancient city mesa in Turpan,which is dry andwindy.Base on the phenomenon of wind erosion of the deformation and destroy ofhigh steep soil slope,the concept of the multivariate layered steep soil slope by winderosion is mentioned.And it is the systematic study to the different wind erosion of themulti-element layered soil slope by the methods of the field survey,sampling,the grainsize analysis experiment,micro-structural analysis and wind tunnel test,data imitation. The main study can divide into following sections:(1)Study the geological environment character.Under the base of many scenesurvey and summary data,there is a systematic analysis to the geological environmentof the multivariate layered steep soil slope in the Jiaohe ancient city mesa in Turpan.On the one hand,on the base of the whole study to the engineering geologicalenvironment,it detailed the characters,which are influenced by the different winderosion of the multi-element layered soil slope.On the other hand,on the premise ofanalysis the character of Turpan's climate,it emphases on the analysis the maininducing factors,the character of wind,in the different wind erosion of themulti-element layered soil slope.(2)The engineering's characters of the soil in the slope.On the premise ofqualitative recognition of the different wind erosion of the multi-element layered soilslope,choosing the typical studied section and adopting the original samples,in whichhave a whole and systematical physical and mechanics experiments.On the one side,enough proved the differences of physical and mechanic nature.Especially,thedifferences of resisting the wind erosion,which is performed by the wind tunnel test inthe laboratory of the sediment-carrying wind speed in Turpan area.On the other side,the basic index of physical and mechanics for the evaluation of the stability to the soilslope.(3)The conditions and effected factors of the different wind erosion effect ofthe soil slope.On the base of analysis for the geological environment and muchpresent qualitative recognition in the Jiaohe ancient city mesa in Turpan,it mentionsthe concept of the different wind erosion of the multi-element layered soil slope andconcludes the necessary forming conditions;And then combining the result of insideexperiments,from micro and macro view,analyzing the special effects of the type ofwind,the sediment-carrying wind speed,soil grain composition,micro-structure index.(4)The effects of the different wind erosion to the evolved pattern andmechanistic analysis.Concluding and summarizing three evolved patterns of theJiaohe ancient city mesa in Turpan because of the different wind erosion effect of thesoil slope.Adopting the geological history causes,to qualitative analyze the mechanism of the three patterns.And then have a quantitative analyze of themechanism by finite difference method.Combining the qualitative analysis andquantitative analysis,it analyzes the stability of forming,processing and evolvingunder the three evolved patterns.(5)The evaluation of stability under the different wind erosion effect for themulti-element layered soil slope.Combining the detailed analysis of geologicalenvironment for the multi-element layered soil slope in the Jiaohe ancient city mesa inTurpan,the four effected situations of centralized rainfall,earthquake and rainfall andearthquake are faced by the different wind erosion effect.Combining the ways of thequalitative analysis and the qualitative analysis of finite difference method ofengineering geomechanics,it evaluates steadily the three patterns of the multi-elementlayered soil slope because of the different wind erosion effect.