路基壓實粉土動強(qiáng)度特性研究.pdf

1、北京交通大學(xué)碩士學(xué)位論文路基壓實粉土動強(qiáng)度特性研究姓名：杜超申請學(xué)位級別：碩士專業(yè)：巖土工程指導(dǎo)教師：侯永峰20080601ABSTRACTSiltwidelydistributedinChinesenorthernregionIt’SoneofthemajorfillerresourcesofthesubgradeFindingoutthedynamiccharacteristicsofthesilthasimportantsigni

2、ficanceforconstructionqualityofsubgradeThispaperbasesonthedynamicpropertiesofcompactedsiltConsidercompaction，watercontent，frequencyandconfiningpressureandotherfactorsWinlamassofrelatedinformationandexistingachievements，t

3、hroughthesaturatedandnonsaturatedsiltdynamictriaxialtestThispapercarriesoutastudyoncompactiondynamicmodulus，dynamicstrengthandtheporepressuredevelopingmodeofsilt，theconclusionsareasfollowings：(1)Taketheairvolumeratioofsi

4、ltasthesupportofthecompactioncontrolstandards，andthereasonablenessisanalyzed(2)DynamicmodulusofsiltsamplesdecreasewiththestraingrowsInthesamelevelofdynamicstrainitincreaseswithconfiningpressureanddrydensityincreaseItredu

5、ceswiththeinitialwatercontentincreasesThePaperhasfindsouttheEa一6curveunderthelargestrainDampingratiochangeswithshearstrainunderdifferentconfiningpressureThepaperputsforwardthecllrves(3)Thedynamicstrengthofthesaturatedsil

6、tisgreaterwhenconsolidationisbiggerThesiltdynamicstrengthdecreases、衍tllthedestructionofvibrationincreasedAtthesametimeunderconsolidationthedynamicstrengthofthesiltincreaseasconsolidationgrowsThedynamicstrengthofthesiltin

7、creaseswithconfiningpressureincreasing，(4)DrivenoutthecurveofUf|oandKcwhichisnearlythelinearrelationship。PutforwardtheporepressureindexmodelofgrowthU|Uf=n—bc’㈣磚fitsbetterwiththetestdataKEYWORDS：siltcompactiondynamicmodul