黔桂线定水坝隧道内无砟轨道病害成因与整治-研究

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1、万方数据西南交通大学硕士研究生学位论文第1I页AbstractNewmixedpassengerandfreightrailwaymainlyusestheballastlesstrackstructureintunnel．Trackstructurehasappearedacertaindegreeofdiseaseaftertheopeningandoperationofthelines，whichcausedbytheeffectofconstructionquality,naturalenvironmentandt

2、rainload．DingshuibatunnelisthelongesttunnelintheprojectofextensionofGuiyang—Guilinline，alotofdiseasesappearedinthelowvibrationtracksinthetunnelafteroperation，whichaffectthesafetyandserviceseriously．ThisthesistookDingshuibatunnelasresearchbackground，reasonableremed

3、iationsolutionsareraisedtoslovethesediseasesbasedonthesurveyandanalysisofdiseasesofballastlesstrackintunnel，andstudiedthefieldperformanceindexofunsupportedbeatingblockdiseaseaswellastheconstructionorganization．(1)AccordingtothesurveyoftrackstructurediseasesinDings

4、huibatunnel，supportingblockappearssomediseasesofunsupportedbatingblocks，cracking，breakage，embeddedpartsfailures．Monolithictrackbedappearssomediseasesofsubsidence，crackingandbreakage，surfaceemittingpulpandsideditchemittingmud．Breakageoftunnelbasementandwaterleakage

5、alsoappear．Thesediseasesaremainlycausedbythetrainload，theenvironmentofthetunnelandtheconstructionqualityandotherfactors．(2)Reasonablediseasetreatmentsareproposedbasedontheexistingtreatmentswhichareappliedforthetreatmentofunsupportedbearingblocks，subsidenceofmonoli

6、thictrackbed，leakageandbreakageofthetunneltoensurethatthetunnelstructurehasagoodtrackoperatingcondition．(3)Threeliftingsupportingblocksschemesareproposedandthemechanicalmodelofrailandsupportingblockliftingisestablished，accordingtotherequirementofreplacementoperati

7、onofbatingblockandtheschemeofupliftingbaringblockbyfillingrepairingmaterialsatthebottomofrubbercoatboot．ReasonablesupportingblockliftingheightandoptimumlengthsofsinglefastenerlooseningareO．17mand18mrespectively．ThethreetrackJackliftingforceineachschemeandtherangeo

8、fconstructionrailtemperaturearedetermined．万方数据西南交通大学硕士研究生学位论文第1II页(4)Inordertoeffectivelyusethesky—light，constructionorganizationisstudiedfromtheconstru