郑西客运专线水泥改良黄土路基填料试验研究

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1、西南交通大学硕士学位论文郑西客运专线水泥改良黄土路基填料试验研究姓名：房立凤申请学位级别：硕士专业：道路与铁道工程指导教师：蒋关鲁20090201西南交通大学硕士研究生学位论文第1I页AbstractTheoperationofhigh—speedrailwayinhighspeed，saltyandstationhaspresentedhigherrequirementsandtheengineeringcharacteisicswillinfluencedirectlythefinalqualityofthesubgrade．Inourcountry，considering

2、thatthelineislong，geologicalconditioniscomplexandtheoptimumfillingmaterialsarelimited,itisdifficulttousetheoptimumfillingmaterialsfortheentirelinenotonlyforthecost,butalsofortheguaranteeoftheoptimumfillingsmaterials．SoexpandingthedimensionoftheavailablefillingmaterialsbyusingtheCclusterfilli

3、ngsandtheimprovedsoil嬲thehigh-speedrailwaybeddingfillingmaterialshaveanimportantmeaningfortherailwayconstructionin0111"country．AccordingtOthestudyonthekeytechnologyofloesssubgradeofZhengzhou-Xi’allPaSsengerDedicatedSpecialLineaSwellasthetechnologyoftheimprovedloesssubgradeandthesitedetecton,

4、aseriesoftestshavebeencarriedout，such觞compactiontest,standardindoorconsolidationtest,shearingtest,unlinedcompressivestrengthtest，CBRtest,slakingtest，timeeffecttest,wetting—dryingtest,freezingandthawingcycletestandSOon．nlepaperstudiedthecharacteristicsofimprovedloessindifferentratioofcement,s

5、uch嬲compaction,waterstability．strengthanddurability，analysisedsomefactorsinfluencingtothestrengthofimprovedsubgrade，suchaSmixtureratio，density，curingperiod,thewatercontentandSOon．Finally，itdeterminedtheoptimumcementInaxtureratiowitchCanprovideacertainreferenceevidenceforthefeaSibilityofthece

6、mentimprovedlossasthesubgradefillingsofPassengerDedicatedSpecialLine．Meanwhile，Combinedwiththeindoortestoncementimprovedloess嬲thefillingmaterialforthesubgradeconstructionofZhengzhou—Xi’a11highspeedrailway；afieldtestapplyinga6％cementinmixratiohasbeenconductedtostudytheconstructiontechniquesan

7、dthetestingmethodonreclamationandcompaction．Byapplyingthedifferentcompactionmethodsondifferentthicknessofthisfillingmaterial，theoptimumroll-onmethod，optimumroll—onfrequencyandcorrelatedcontrollingparametershavebeenidentifiedandthisprovidestherefere