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1、西南交通大學碩士研究生學位論文第1I頁AbstractKarstiSaheavytotherailwayengeering.Suchasthekarstwaterhit,theroofofthelimestonecavecollapseandthelargescaleofsurfacesubsidenceandmore,whichiSasoimportantengeeringgeologeproblemintherailwayconstruction.Becauseoftheengineeringdestructiveandth
2、edifficultytoforesightofthekarstgroundcollapseintheseareasthattherailwaylineisthrough.thehighspeedrailwaywillgetahugelosses.Withthedevelopmentoftheeconomy,inthekarstareathatlinearengeeringjustlikethehigh—speedrailwaycannotavoid,karstproblemwillbemoreobvious.Firstly,a
3、ccordingtotheliveinvestigation,samplingtothekarstoftheresearchareaandthedeepinvestigationtothecollapsedareaandtheanalysisfromeachsideofsoil,rockandgroundwater,wecanknowthegrouthconditionthattheresearchedareahastodependonforits’collapseandhavebeensureofthecollapsechar
4、acteristicoftheresearcharea.ItprovidesUSthebasistoresearchthoroughlytheformationmechanismofthekarstcollapseintheresearcharea.Secondly,accordingtocollectingtheresearchdataoftherailwayinkarstareaandhighwayengeering,wehavegottenafurtherknowledgeoftheformationmechanismof
5、thekarstcollapse.AndcombinethelithologicfeaturesofthekarstgroundsubsidenceinresearchareaandthehydrogeologicalfeaturesaswellastheweatherconditionsitiSin.WeCaneasilyanalysetheformationmechanismofthekarstcollapseintheresearchareaandthekarstcollapsemode.AccordingtotheYun
6、guirailwayalongtherouteandthegrouthfeatureofthesoilholeinundergroundandcombinethesoilpropertiesintheresearcharea.Usethemethodofnmnericalsimulationtohavethesoilcavecollapsesimulationanalysis.Finally,passagehasdiscussedtheengineeringprotectingcountermeasuresweshouldtak
7、etodealwiththekarstgroundcollapsewithdifferentfeatures,whichprovidesUSrecommendedpracticeofkarstdesignandconstruction.Keywords:KarstcollapseFormationmechanisNumericalsimulationPrevention西南交通大學碩士研究生學位論文第1II頁目錄第1章緒論??????????????????????????????..11.1研究背景??????????????
8、???????????????11.2巖溶塌陷研究概況?????????????????????????21.2.1國內(nèi)研究概況????????????????????????..21.2.2國外研究概況????????????????????????..41.