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2022, 41(2) 373-385 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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Application of comprehensive geophysical prospecting in studying genetic mechanism of Changbai Dahu landslide in JilinProvinc |
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YUZerui1,2,3 ,FANGShi1,4 ,WANGYan2,3 ,DUJun5 ,CHENYang2,3 |
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1CollegeofEarthSciences,JilinUniversity,Changchun130061,China;
2InstituteofGeologicalMineralSurveyandDesignofJilinProvince,Changchun130012,China;
3GeologyandMineralConstructionGroupCo,LtdofJilinProvince,Changchun130012,China;
4KeyLaboratoryforOilShaleandCoexistingMineralsofJilinUniversity,Changchun130061,China;
5LiaoningEngineeringSurveyandDesignInstituteCo,Ltd,Jinzhou121000,Liaoning,China |
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Abstract:
TakingtheDahulandslideinJiefangvillage,ChangbaiKoreanAutonomousCounty,JilinProvince asanexample,theauthorsmakeacomprehensiveexplorationwiththehelpofhighdensityelectricalmethodand multichanneltransientsurfacewavemethod.Thiscombinedwiththedrillingresults,clarifiestheshape,material compositionandthicknessofthelandslide,infersthelocationoftheslidingsurface,andanalyzestheinfluencing factorsandgeneticmechanismofthelandslide.TheresultsshowthattheDahulandslideisaffectedbylandform,lithology,hydrologicalconditionsandotherfactors.Duetomanualexcavation,theslopetoeisfreeandtension cracksareformedattherearedgeoftheslope.Rainfallinfiltrationreducestheshearstrengthofrockandsoil mass,resultingincreepdeformationalongthefoundationoverburdeninterface(slidingsurface).Withtheaccumulationofslopestress,thedeformationintensifies,andfinallyleadstoslopeinstabilityandfailure.ThegeomechanicalmodeloftheDahulandslideiscreeptensioncrack,anditsevolutionprocessescanbesummarizedintothree stages:landslidecreepdeformation,slopecrackdevelopmentandlandslideslidinginstability |
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Keywords:
landslide
highdensityelectricalmethod
transientsurfacewavemethod
geneticmechanism
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Received Revised Online: |
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