DOI：10.11883/bzycj-2021-0503城市地下浅埋管沟可燃气体爆炸的灾害效应（Ⅱ）：影响因素分析及后果评估*杨石刚1，蔡炯炜1,2，杨亚1，孙文盛1，门敬敏1（1.陆军工程大学爆炸冲击防灾减灾国家重点实验室，江苏南京210007；2.73021部队，浙江杭州310012）摘要：为系统地评估城市地下浅埋管沟可燃气体爆炸的灾害后果，利用FLACS软件模拟得到了可燃气体的爆炸荷载，并分析了该灾害对建筑物破坏和人员伤害的危险距离及影响因素。结果表明：当点火位置靠近管沟中间位置时，超压峰值和危险距离较大；泄爆口的大小对危险距离的影响不大，而对离泄爆口较近处的超压峰值影响较大；气云长度越长，超压峰值和危险距离也越大，但增幅逐渐减小直至不变；管沟的横截面面积越大，超压峰值和危险距离也越大；为避免造成严重的灾害后果，高耸建筑物和密集人群应远离泄爆口。关键词：城市地下浅埋管沟；可燃气体；爆炸冲击波；危险距离；超压峰值；气云长度；后果评估中图分类号：O382国标学科代码：13035文献标志码：ADisastereffectsofcombustiblegasexplosioninanurbanshallow-buriedpipetrench(Ⅱ):influencingfactoranalysisandconsequenceevaluationYANGShigang1,CAIJiongwei1,2,YANGYa1,SUNWensheng1,MENJingmin1(1.StateKeyLaboratoryofDisasterPreventionandMitigationofExplosionandImpact,ArmyEngineeringUniversityofPLA,Nanjing210007,Jiangsu,China;2.73021TroopofPLA,Hangzhou310012,Zhejiang,China)Abstract:Gasexplosionaccidentsoccurringinurbanshallowly-buriedpipetrenchescancauseenormouscasualtiesandpropertydamagethroughshockwavestransmittingfromexplosionvents,whilemanyinfluencingfactorsexistintheprocessofgasexplosion.Inordertoevaluatethedisasterconsequencesofcombustiblegasexplosioninanurbanshallow-buriedpipetrenchsystematically,thedifferentconditionswereestablishedincludingdifferentignitionpoints,differentventsizes,differentgascloudlengthsanddifferenttrenchcross-sectionalareas.ThecomputationalfluiddynamicssoftwareFLACSwasusedtoperformnumericalsimulation.AndtheexplosionloadofthecombustiblegaswasobtainedintheX,Y,andZdirections.Thecharacteristicsoftheexplosionoverpressurepeakdistributionwereanalyzed,andtheloadgenerationmechanismwasillustratedbyanalyzingtheexplosionprocess.Theove...
