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1、西南交通大學(xué)本科畢業(yè)設(shè)計(jì)（論文）第14頁UrbanUndergroundRailroadarchtunnelConstructionTechnologyGroupAbstractProjectinGuangzhouMetroLine,right-archconstructionmethodoftunnelstoexplore.SubwayConstructioninGuangzhouforthefirsttimeputforwardadouble-archtunneltosingle-holetunnelconstructiontechnol
2、ogy,andasingletypeofwallandsplitinthewallstructure,comparisonandselectionofTechnologysolutionswereobtainedtomeetthestructuralsafety,constructionsafetyandEconomicbenefitsofbetterTechnologysolutionsforthefuturedesignandconstructionofsimilarprojectstoprovidereferenceandreferen
3、ce.Keywords:double-archtunnelgroup;asingletypeofwall;constructionTechnology;splitinthewall.Asthecircuitdesignrequirementssubwaytunnel,thetunnelstructureproducesavarietyofforms,rangingfromcross-sectionfromdouble-archandthethree-archtunnelcomposedofdouble-archtunnelsectionisc
4、ommonlyusedintheconnectionlinesandcrossinglines.Inthispaper,engineeringexamples,accordingtotunnelinwhichgeologicalconditions,durationrequirements,raisedthroughthecomparisonandselectioncanachieverapidconstructionandthepurposeofconstructioncostsavingsofthebestconstructionprog
5、rams.1ProjectOverviewGuangzhouMetroLineRoadstationturn-backlineofsportsforsportsRoadstationafterthereturnline,structurecomplex,DK3016.047~037.157varyingcross-sectionsetthedouble-archstructure,three-archstructureoftunnels.Rangingfromcross-archtunnelexcavationspan20.1m,excava
6、tionheightof10.076m,cross-vectorratioof1:0.5,afterliningaholespan5.2m,largeholes,afterliningspan11.4m,thewallthicknessof1.6m.Threedouble-archtunnelexcavationspan19.9m,excavationheightof7.885m,cross-vectorratioof1:0.1.-Archtunnelsectionofrockfromtoptobottomare:artificialfill
7、soil,red-alluvialsand,alluvial-alluvialsoil,riverandlakefaciessoil,plastic-likeresidualsoil,hardplastic-ahard-likeresidualsoil,allweatheredrock,strongweatheringrock,theweatheredlayerandthebreezelayer.Tunnelthroughtherockstrataaremorehomogeneous,theintensityhigh,carryingabil
8、ity,goodstability.Thicknessofthetunnelvaultcovering15.5~18m,ofwhichgradeⅣWairockva
