重庆某区间隧道火灾烟气控制分析

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1、重庆大学硕士学位论文人员朝着逆风向疏散可以保证安全，因此此类火灾场景应采用机械送风模式；在隧道四分之三位置（靠近车站端）发生火灾，机械排烟模式相比于机械送风与自然通风，可以降低烟气的各种危险值指标。其危险值指标随着隧道纵向距离靠近室外开敞端而降低地更快。室外开敞端位于主导风向的上游，人员朝着逆风向前进，烟气会减少直至没有，火源下游成为安全疏散区域，因此此类火灾场景应采用机械排烟模式。关键词：典型区间隧道，室外风速，火源位置，烟气控制II英文摘要ABSTRACTThesmokecontrolinrailwayt

2、unnelsisaveryimportantinsuranceofrailwaytunnelsafetyandevacuation.Inrecentyears,thesmokecontrolofhighwaytunnelsisthemainsubjectoftunnelsmokecontrolresearchathomeandaboard,andtheresearchofsmokecontrolinrailwaytunnelsisstilldefective.Duringtheprocessesofarail

3、waysystem’sconstructionandmanagement,smokecontrolintunnelsisamatterwhichcannotbeneglected,andit’sanimportantdirectioninrailwaysafetyresearches.ThispaperisbasedonChongqingScienceandNatureFoundationProject“Theresearchofrailwaytunnelfiresmokecontroltheory”.The

4、researchoftypicalrailwaytunnelventilationmodelinlongitudinaldirectioninthisprojecthassignificantmeaningsonthetunnelfiresmokecontroltheoryandengineeringpracticeonsmokecontrolsystem.Afteranalyzingandsummarizingformerresearches,investigationshavebeenmadeonthet

5、unnel’sformsofNo.6railwaylineanditsbranchlinesinChongqing,theventilationandsmokecontrolsysteminGuoBolinewhichisabranchofNo.6railway,andthelongitudinalventilationmodelanditscontrolstrategyinNo.6railway.ByFDS,anumericalsimulatingmethod,researchesofsmokecontro

6、lstrategyhavebeenconductedaimingatonetypicaltunnelinNo.6line(connectingwithanundergroundstationononeside,andaviaductonanotherside).Afull-scaleexperimenthasbeenusedtodemonstratethereliabilityofFDSsimulationmodel,andbasedonthis,theinfluenceofdifferentwindvelo

7、cityonsmokemovementcharacteristicsindifferentsmokecontrolmodelsofatypicaltunnelhasbeeninvestigated,alsotheinfluenceofdifferentsmokecontrolmodelsanddifferentpositionsoffiresourcesonsmokeflowingcharacteristicsofatypicaltunnelinlongitudinaldirection.Theresulto

8、finvestigationshows:thetunnel’sformsofChongqingNo/6railwaylineandGuoBobranchlineareeffectedbyterrain,andtheformscanbedividedintotwotypeswhicharetunnelswithsingleholeandsinglelineandtunnelswithsinglehol