§◆ SoilFormation◆ CompositionandStructureofSoil◆ SoilModelExpressions----PhaseRelationships ◆ Relativedensityofthegranularsoils◆ Consistencyofcohesivesoils◆ paction◆ ClassificationCivilEngineeringDepartmentofShanghaiUniversitySoilMechanicsChapter1§,umulationofmineralparticlesformedbytheweatheringofrocks,thevoidspacebetweentheparticlescontainingwaterand/.♦ResidualsoilIftheproductsofweatheringremainattheiroriginallocationtheyconstitutearesidualsoil.♦TransportedsoilIftheproductsaretransportedanddepositedinadifferentlocationtheyconstituteatransportedsoil,theagentsoftransportationbeinggravity,wind,(Crystallineparticles)PhysicalProcess(SingleGrain)WeatheringTemperatureWaterIce/glacierWindDisintegration(freezing/thawing)AirWaterCO2Liquid(acid,oxygen,etc)§♦Particlesizesvaryconsiderablyfromthosemeasuredinmicrons(clays)tothosemeasuredinmeters(boulders)---adifferenceofonemillion!positesoilsandthedistributionofthesesizesgivesveryusefulinformationabouttheengineeringbehaviorofthesoil.♦Thedistributionisdeterminedbyseparatedtheparticlesusingtwoprocesses—♦Sievesseparateparticlesintherangebetween75mmand60μm(gravelandsand)andsedimentationseparatesparticleslessthan60μm(siltandclay).♦ThistestprocedureisbasedonStockes’Law,whichgovernsthevelocityatwhichsphericalparticlessettleinasuspension:
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