川东红层地区铁路工程地质问题分析

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1、西南交通大学硕士研究生学位论文第1I页AbstractRedlayersarepredominantlyfragmentalsedimentaryrocksofredcontinentaldeposit，whichtypicallyconsistofsandstone，muddysiltstone，siltstone，andshale，etc．Redlayersarelowinpermeability,highinhydrophilicity,lowinstrength，easilysofteninwateranddisintegr

2、atedifdehydrated，SOtheslopesofredlayersaleeasytoslide，whichcauseslotsofgeologichazardsduringconstruction．ExpansionandreconstructionrailwayprojectfromDazhoutoChengduislocatedintheeasternpartofSichuanwhereredlayersarewelldeveloped．Duetospecialengineeringcharacteristic，it

3、resultsingreaterinfluencesonconstructionandoperationoftherailway．Basedonregionalgeologyinvestigation,exploration,in-situtestingandlaboratoryandfieldexperimentsalongtheline，detailedstudieshavebeencarriedoutonengineeringgeologycharacteristicsofredlayersintheeasternpartof

4、Sichuanwiththecombinationofmathematicalanalysisandengineeringexampleinthispaper．Compositions，constitutionalfeaturesandphysicalmechanicpropertiesofredredsandrelationsbetweenthemweresystematicallystudiedwimstatisticsandanalysisofmaterialcomposition，rockandsoilphysicaland

5、mechanicalparametersaswellasresultsfromrepresentativesampledisintegrationandcreepexperiments，whichrevealsthatthephysicalstructuresofredbedsaletheinnertodeterminephysicalmechanicproperties，andplayakeyroleintheengineeringgeologicalproperties．Atthesametime，thephysicalandc

6、hemicaleffectsofwaterontheredlayerandtheerosi’onofwaterontheconcretewerealsostudied、析t11statisticsandanalysisofwaterchemicalcharacteristicsalongtheline．Atlastaccordingtothemainengineeringgeologicalproblemsofredlayersalongtheline，theeffectsofredlayersonroadbedandbridge，

7、tunnel，andthelimitationsassubgradefillingwithengineeringexamples，andthecorrespondingcountermeasuresandsuggestionsweregiven．Keywords：Redlayers；Engineeringgeology；Disintegration；Erosion；SubgradeFilling1．1选题的意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．1．1论文选题的意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯。11．2红层的研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．21．2．1红层的国内研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．21．3论文主要研究内容、思路和方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯