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                      Asetofmathematicalmodelsfortheevolutionsofshrinkage - cracking - subsidence
                                             forexpansivesoilsduringdrying
                     ZHANGZhao,GAOShuaidong,ZHULiangyu,YUANHaoyu,CHENCong,LIUFengyin
                             (InstituteofGeotechnicalEngineering,Xi’anUniversityofTechnology,Xi’an 710048,China)


                  Abstract:Expansivesoilsmayshrink,crackandsubsideastheydry,causingaremarkableinfluenceontheirhy
                  draulicandmechanicalbehaviorsandleadingtoanadverseimpactonthedeformationandstabilityofhydraulic
                  structureintheregionsofexpansivesoils.Therefore,itisnecessarytoinvestigatethemeso - scalemechanismand
                  macro - scaleresponseofthesethreephysicalprocessesInresponse , asetofmathematicalmodelswerefirst
                  proposedfortheaggregate ,crack,andsubsidencedomainsIntheprocessofallthree,thegeometricalrelationship
                  betweenidealsoilblockandcrackwasthenappliedtoderivationoftheequationforrelativecrackwidth.Finally ,
                  usingthesamesetofparameters,thesetofmathematicalmodelswerevalidatedagainstthepublisheddata(inclu
                  dingthesupplementarytestofexpansivesoilinAnkang)fordifferentexpansivesoilsinthelaboratoryandfield,for
                  describingtheevolutionofaggregateporosity ,crackratio,relativecrackwidth,subsidenceratioandtherelation
                  amongaggregateporosity ,watercontentandmatricsuction.Thissetofmathematicalmodelsprovidesamethodto
                  analyzevolumechangecharacteristicandhydraulicconductivitybehaviorofexpansivesoils.
                  Keywords:expansivesoil;shrinkage;cracking;subsidence;porosity

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