简介：Theresultsofastudyonthekeytechnologyofusingshellsand,akindofseasand,asbackfillforseareclamationaredescribedbriefly.Laboratorytestsshowthatthephysicalandmechanicalpropertiesofshellsandareasgoodasnormalquartzsand.Basedonthechemicaltestanddurabilitytestofshellsanditcouldbeconcludedthattheinfluenceofcorrosionofshellsandbyacidrainandseawatermightbeignoredintheevaluationofthesafetyanddurabilityoftheengineeringproject.Theresultsoffieldimprovementtestsshowthatthebearingcapacityofshellsandbackfillfoundationismorethan200kPaaftervibroflotationimprovementordynamiccompactionimprovement.Theshellsandisagoodbackfillmaterialforseareclamation.
简介：Principalstressaxesrotationinfluencesthestress-strainbehaviorofsandunderwaveloading.Aconstitutivemodelforsand,whichconsidersprincipalstressorientationandisbasedongeneralizedplasticitytheory,isproposed.Thenewmodel,whichemploysstressinvariantsandadiscretememoryfactorduringreloading,isoriginalbecauseitquantifiesmodelparametersusingexperimentaldata.Foursetsofhollowtorsionexperimentswereconductedtocalibratetheparametersandpredictthecapabilityoftheproposedmodel,whichdescribestheeffectsofprincipalstressorientationonthebehaviorofsand.Theresultsprovetheeffectivenessoftheproposedcalibrationmethod.
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