南昆铁路膨胀土路基翻浆冒泥病害分析与改良土试验研究

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1、西南交通大学硕士学位论文南昆铁路膨胀土路基翻浆冒泥病害分析与改良土试验研究姓名：吴新明申请学位级别：硕士专业：地质工程指导教师：巫锡勇20070401西南交通大学硕士研究生学位论文第1I页AbstractExpansivesoil,isformedinnaturegeologyprocessandspecialclaydistributedallovertheworld,whilesweUwhenpossesswaterandshrinkwhenloseswater．ItCanharmtobuildingthat

2、constructinlow·surfacegroundsill．It’SclayagglomerationiscomposedofmontmorillonitethatCanstronghydrophiilcandotherclayminerals．Ithavecharacteristics．suchasovertakeconcretion,manyfissures，markedinteneratedwhendrinkingWat廿"andshrinkwhenloseswater．Therefore，railw

3、aybedhappenshoulderofroadpushingfrequenfly．ThedistancesNankunrailwayexpansivesoilbedis146kilometer,itaffectedthetravelingofrailstrongly．Thepaperfwsflyanalysisthetgeologyenvironmentconditionoftheformofexpansivesoil。andanalysistheprincipleshoulderofroadpushing。

4、砸璩causeofshoulderofroadpushingofexpansivesoilisdivdafromoutsidefactorandinsidefactor．Theinsidefactorsaretheexpansion，fissuresandover-consolidationreferredas'q'HREEPROPERTIES”．11砖expansionfactoriscomposedofmontmorillonitethatcallstronghydrophilicandotherclaymi

5、nerals．Theoutsidecausesiscomposedofsub-tropicolimateofGuang-xiareaandtrainloading，especiallyvibrationloadingoftrains．Timintensionofsoilisdecreasingandexpansionperiodicitybecauseofdry-wetvariety．thecauseisbedcircleandbringshoulderofroadpushingofexpansivesoil．T

6、herefore，onlyimprovementofchemicalcomponentandexpansionretrained,Canpreventsshoulderofroadpushingofexpansivesoil．11璩feasibilityandadvantagesanddisadvantagesthatpreventshoulderofroadpushingbycementpouringisputforwards．ThetestexpansivesoilistakenfromtimTiandong

7、ofNankunrailway．Firstly,thesoil’sphysicsandmechanicspropertiesarcmeasured．Secondly。differentmixedcement．mixedratiois4％，6％，8％，10％、12％、14％、16％、18％．Thesampleismaintainedsevendaysandtwenty-eightdays。twokindsofmaintainingconditionisimmersionandnon-immersion．Afterw

8、ards，pressurequalityinno·sidelimited,arcmeasured．Otherphysicsandmechanicspropertiesincludesfreeexpansiveratio，plasticindexandliquidindex．Bythetests，thelawsofimprovementofexpansivesoiliskn