Page 194 - 《水资源与水工程学报》2022年第1期
P. 194
!33 " ! 1 # & ' ( ) & * + , - Vol.33No.1
2022 $ 2 % JournalofWaterResources&WaterEngineering Feb.,2022
DOI:10.11705/j.issn.1672-643X.2022.01.27
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BCDEF:TV16;TU41 GHIJK:A GLMF:1672643X(2022)01019009
Analysisofstructuralstrengthandquantitativeindicesof
uncementedcoarsegrainedsoil
WANGYang,WEIYufeng,HUANGXin,HECongxi,LIANGPeng
(StateKeyLaboratoryofGeohazardPreventionandGeoenvironmentProtection,ChengduUniversityofTechnology,Chengdu610059,China)
Abstract:Theinitialstructureofcoarsegrainedsoilhasagreatinfluenceonitsmacroscopicshear
strengthandthestrengthevolutionduringshearing.Inordertostudytheinitialstructuralstrengthof
coarsegrainedsoilandthecontributionoftheinitialstructuretotheshearstrengthintheshearing
process ,avisualizeddirectshearapparatuswasusedtoinvestigatetheshearstressvaluecontributedby
theinitialstructureoftheparticlesinthemacroscopicshearstrengthofthesoil.Itisconcludedthatthe
shearstressresistedbytheinitialstructureofthecoarsegrainedsoilaccountedforaboutonethirdofthe
overallshearstrength.Thenthevariationsoftheparticleinitialstructurecharacteristicindices ,suchas
particleshape,arrangementandcontactrelationshipwereanalyzedbeforeandaftertheinitialstructure
wasdeconstructed ,andtheinfluenceweightofeachindexontheinitialstructureeffectwasevaluatedand
rankedusingAHP -weightentropymethod.Theresultsshowthattheparticlecontactrelationshiphad
thegreatestinfluenceontheinitialstructureeffect ,anditsweightaccountedfor42.66%,followedby
theoverallparticleprofilecoefficient ,whichaccountedfor26.02%.
Keywords:coarsegrainedsoil;initialstructure;shearstrength;AHP-entropyweightmethod
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