Page 204 - 《水资源与水工程学报》2022年第5期
P. 204

! 33 " ! 5 #                      & ' ( ) & * + , -                               Vol.33No.5
               2022 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2022

            DOI:10.11705/j.issn.1672-643X.2022.05.25


                               º»Öšˆ EPS @AVÃ”X


                                      Mºø:‹ŒÝÞTU


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                                         žØÙ , Ú^Û , 7 Ü , ÝÞß                 2
               (1. 1&%lP& 1&þýÌWV„UXJefgh, o1 1& 710054;2. 1ijk%lP& CIW¹ÐUX&Y,
                              o1 pq 712100;3. o1½Y¸n¡UX¹"Ü&.Ò, o1 1& 710011)
                 C D: B—†‡‡ôúÍy EPS ÃÄðLø6Ì}‡S½ ¦§, )PO‡{g>?—é̅‚¤²äø6Ì
                 ‡ôúÍB 0.02,0.1,0.2,0.8,2.4mm/min Ú }‡S½{³。{gÉßÎà: ø6Ì ‡G_ - ‡ô°‘
                 EC[v€«ÓąKÓÄo~;©, ª«Œ EPS ÃÄ1¼ä、 C#1¼ä、 ¡AG_ b,, éÌ ‡G_ -
                 ‡ô°‘EC[;©B«ÓÄ。‡ôúÍJP, {Cl¯âã7w‡SÔxÚJ$。‚¤‡ôú̈́, ø6Ì
                  }‡S½Þ[=B[Ä, WV?É¿³ÌLÞ[M0。OB‹~É¿³ÌL, ²äyø6Ì}‡S½ ¦§
                 cχ³ , }‡S½、 ¯_…º§¨ª÷C#1¼ä iP、EPS ÃÄ1¼ä ‘±tiP。‡ôúÍyø6
                 Ì}‡S½、 ¯_…º§¨ª¦§]±, yé̦§]P。÷ø‡ôúÍiP, ø6Ì}‡S½、 ¯_…º§
                 ¨ªeÓP½]±, Ug›eÓÿŠ, éÌ}‡S½、 ¯_…º§¨ª‹Œ‘±。
                 EFG:EPS ÃÄø6Ì; }‡S½; ‡ôúÍ; ¯_; º§¨ª
                 HIJKL:TV16   MNOPQ:A    MRSL:1672643X(2022)05020008
              InfluencelawsofshearrateonshearstrengthofEPSbeadslightweightsoil

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                              YANGKaixuan ,HOUTianshun ,WANGQi,LUOYasheng
            (1.Xi’anKeyLaboratoryofGeotechnicalandUndergroundEngineering,Xi’anUniversityofScienceandTechnology,Xi’an710054,
           China;2.CollegeofWaterResourcesandArchitecturalEngineering,NorthwestA&FUniversity,Yangling712100,China;3.Hanjiangto
                            WeiheRiverValleyWaterDiversionProjectConstructionCo. ,Ltd.,Xi’an710011,China)
                 Abstract:Inordertoclarifytheinfluenceofshearrateonshearstrengthofexpandedpolystyrene(EPS)
                 beadslightweightsoil,theshearstrengthcharacteristicsofremoldedsoilandlightweightsoilwithdiffer
                 entmixingratiosatshearratesof0.02 ,0.1,0.2,0.8and2.4mm/minarestudiedbydirectshear
                 tests.Theresultsshowthattherearetwotypesofrelationcurvesbetweenshearstressandsheardisplace
                 mentforlightweightsoil ,whicharestrainhardeningandstrainsoftening,andtheyaresubjecttoEPS
                 beadsmixingratio,cementmixingratioandnormalstress.Thetypeofshearstress-sheardisplacement
                 relationcurvesofremoldedsoilisstrainhardening.Thehighertheshearrate,thelesstimeittakesfor
                 thesamplestoreachshearfailureorplasticflowstage.Underdifferentshearrates,theshearstrengthen
                 velopesoflightweightsoilaremostlybrokenlinetype ,whicharesimilartothoseoftheconventional
                 structuralsoil.MixingratiohasadecisiveinfluenceontheshearstrengthofEPSbeadslightweightsoil ,
                 becauseitisalsoakindofstructuralsoil.Itsshearstrength,cohesionandinternalfrictionangleincrease
                 withtheincreaseofcementmixingratioandthedecreaseofEPSbeadsmixingratio.Theshearratehas
                 littleeffectontheshearstrength,cohesionandinternalfrictionangleofthelightweightsoil,buthasa

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