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时间:2020-03-25
《平潭海峡公铁两用大桥施工安全风险评估.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、12桥梁建设2017年第47卷第1期(总第242期)BridgeConstruction,V01.47,No.1,2017(TotallyNo.242)文章编号:1003—4722(2017)01—0012一05平潭海峡公铁两用大桥施工安全风险评估朱治宝1’2,马长飞1’2,王波1’2,荆国强1’2(1.中铁大桥科学研究院有限公司、,湖北武汉430034;2.桥梁结构健康与安全国家重点实验室,湖北武汉430034)摘要:平潭海峡公铁两用大桥施工海域地质、水文、气象环境恶劣,给桥梁施工带来巨大的安全风险,为加强施工的安全管理,提升风险决策水平
2、,综合参考大桥施工组织状况及施工海域地质、气象环境等多方要素,确定了施工过程中存在的96个典型潜在危险源,在此基础上通过专家问卷调查,采用LEC法确定了单个危险源风险值,然后分别基于作业分解结构一风险分解结构评估方法与模糊层次综合法对平潭海峡公铁两用大桥通航孔桥施工进行了风险评估。结果表明:平潭海峡公铁两用大桥施工存在较大风险,其中,海上运输、桥塔墩身施工、边墩与辅助墩施工、钢桁梁施工及斜拉索施工作业这5个施工单元被评估为“风险极高”,须分别采取针对性的风险控制措施。关键词:跨海桥梁;公路铁路两用桥;风险评估;危险源;模糊层次综合法;桥梁施
3、工中图分类号:U448.121;U445.1文献标志码:ASafetyRiskEValuationofConstructionofPingtanStraitsRail—cum—RoadBridgezH【,Z矗f一6口D1’2,MACh口ng一,efl’2,wANGB01,2,t,JNGGHo—qZn咒91'2(1.ChinaRa订wayBridgeScienceResearchInstituteLtd.,Wuhan430034,China;2.StateKeyLaboratoryforHealthandSafetyofBridgeStruc
4、tures,Wuhan430034,China)Abstract:Thegeology,hydrologyandmeteor0109yenvironmentintheseaareaofthePingtanStraitsRai卜cum—RoadBridgeissevereandthesevereenvironmentaccordinglybringsaboutgreatsafetyrisktotheconstructionofthebridge.Toreinforcethesafetymanagementandimprovetheriskde
5、cisionmakingoftheconstructionandonthebasisofthesyntheticconsiderationofthefac—torsliketheconstructionorganizationofthebridgeandtheenvironmentintheseaarea,96typicalpotentialdangersourcesthatmightexistinthewholeprocessoftheconstructionwerelocated.Furtherthroughtheexpertquest
6、ionnairesurvey,theriskvaluesofeachsingledangersourceweredetermined,usingtheLEC(1ikelihood,exposureandconsequence)methodandtheriskevaluationoftheconstructionofthenavigablespanbridgesofthebridgewasimplemented,usingtheWBs-RBS(workbreakdownstructure—riskbreakdownstructure)meth
7、odandthefuzzvanalvtichierar—chyprocess.Theresultsdemonstratethatthegreatsafetyriskexistsintheconstructionofthebridge,ofwhichthe5constructionunitshketheseatransportation,pylonandpylonpiercon—struction,sideandauxiliarypierconstruction,steeltrussgirdererectionandthestaycablei
8、nstal—lationareconsideredtobe“extremelyrisky”andthepointedriskcontr01measuresforthecon—st
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