制样方法对非饱和压实黄土强度变化影响的试验研究

制样方法对非饱和压实黄土强度变化影响的试验研究Title: Experimental Study on the Influence of Sample Preparation Methods on t

制样方法对非饱和压实黄土强度变化影响的试验研究 Title:ExperimentalStudyontheInfluenceofSamplePreparationMethodson theStrengthVariationofUnsaturatedCompactedLoess Abstract: Thispaperpresentsanexperimentalstudyontheinfluenceofsample preparationmethodsonthestrengthvariationofunsaturatedcompacted loess.Threedifferentsamplepreparationmethodswereemployed:static compaction,dynamiccompaction,andair-dryingmethod.Unconfined compressivestrengthandshearstrengthtestswereperformedtoevaluatethe effectofthesemethodsonthestrengthcharacteristicsofunsaturated compactedloess.Theresultsshowthatthesamplepreparationmethod significantlyinfluencesthestrengthpropertiesofunsaturatedcompacted loess.Thedynamiccompactionmethodresultsinthehigheststrength, followedbythestaticcompactionmethodandair-dryingmethod.Thisstudy providesimportantinsightsfortheselectionofappropriatesample preparationmethodsforunsaturatedcompactedloess. Keywords:Unsaturatedloess,Compaction,Strengthvariation,Sample preparationmethods 1.Introduction: Unsaturatedloessisawidelydistributedsoiltype,particularlyinloessregions. Itexhibitsuniquemechanicalbehavior,anditsstrengthpropertiesvary significantlywithchangesinwatercontentanddegreeofcompaction.To accuratelyassessthestrengthandstabilityofunsaturatedloess,itiscrucialto considertheeffectsofsamplepreparationmethodsonitsstrength characteristics.Thisstudyaimstoinvestigatetheinfluenceofdifferentsample preparationmethodsonthestrengthvariationofunsaturatedcompacted loess. 2.ExperimentalProcedure: 2.1SoilSampleCollection: Undisturbedsoilsampleswerecollectedfromaloessdepositatacertainsite. Carewastakenduringsamplecollectiontoensurethatthesamplesremained intactandpreservedtheiroriginalmoisturecontent. 2.2SamplePreparationMethods: Threedifferentsamplepreparationmethodswereemployed: -Staticcompactionmethod:Thecollectedsoilsampleswerecompacted staticallyinthinlayersusingamanualcompactiondevice.Thesamplewas dividedintoseverallayers,andeachlayerwascompactedbyapplyinga specificcompactioneffortthroughrepeatedtapping. -Dynamiccompactionmethod:Thecollectedsoilsampleswerecompacted