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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．
