device for measuring landslide critical angle

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1、DeviceforMeasuringLandslideCriticalAngle　　摘要：Themountainlandslidehashighdestructiveeffects，discussionofitslandslidecriticalanglehasalwaysbeenoneofthemajorconcerns，andwedesignedasystemthatcanautomaticallymeasurethelandslidecriticalangle.Thisequipmentconsists

2、ofthebox，waterflowdevice，rotationinclinedplane，rotationdrivingmechanism，scaleandsensor.Wecaneffectivelyanalyzethedynamiccharacteristicsbetweenthewaterflowandthesoilmass，inthiswaytopredictthepossiblegradientforlandslidetooccur.　　关键词：Experimentalapparatus，Lan

3、dslide，Criticalangle　　Preface　　Landslideisacommonnaturaldisasterinthemountainousarea.Chinahasspecialgeologicstructure，itsmountainousareasaccountfor2/3ofthenationalterritorialarea，andtheseverityandwidedistributionofitslandslidedisastersareveryrareintheworld[

4、1].Therearefourmainfactorsthatcouldaffectthelandslidestability：thegeologicalconditions，geographicandgeomorphicconditions，humanactivities，climateandrun-offconditions.Amongthem，gradientisthemainparameterusedto19describegeographicandgeomorphicconditions，whichc

5、anaffectthesoilerosiondegreeandmethod，anditisverynecessarytomeasurethecriticalgradientofdifferentunderlyingsurfaces.Therefore，weconductresearchonthecriticalfeaturesofsoillandslideandpredictthepossibilityofslopelandslideandcalculatethetimeoflandslideoccurren

6、cethrougheffectiveanalysisofthedynamiccharacteristicsbetweenthewaterflowandthesoilmass，whichhasveryimportanttheoreticalsignificanceandactualapplicationvalue.　　Thelandslidetestcanbeusedtorepeatedlystimulatethewholedevelopmentprocessofsoillandscapedifficultto

7、observeinthefieldinthelaboratorywithinashorttime.Sincetheearly20thcentury，someWestEuropeancountrieshavestartedthestructuralmodeltestandgraduallydevelopedsimilartheories.WithinChina，fortheresearchcontentoflandslidesimulationtest，mostscholarsfocusonthetwoaspe

8、ctsrainfallandundergroundwaterlevelresearch[2～8].LiuBo[9]usedthelargelandslidephysicalmodeltestsystemdevelopedbyKeyLaboratoryofGeologicalHazardsonThreeGorgesReservoirArea（ChinaThreeGorges），MinistryofEd