DOI:10.11973/fsyfh-202212014深中通道混凝土结构耐久性设计王康臣1,方翔2,3,范志宏2,3,曾俊杰2,3,王彭生2,3(1.广东省公路建设有限公司,广州510623;2.中交四航工程研究院有限公司,广州510230;3.水工构造物耐久性技术交通运输行业重点实验室,广州510230)摘要:深中通道是一项标志性重大跨海通道工程,其混凝土结构的耐久性问题突出。深中通道所处区域的环境与港珠澳大桥类似,因此深中通道钢筋混凝土结构的耐久性设计采用了港珠澳大桥基于可靠度的耐久性设计方法,并利用港珠澳大桥暴露试验和工程施工数据,进一步对设计模型中氯离子扩散系数、保护层厚度安全裕度等参数进行了优化、修正。考虑到荷载对氯离子渗透率的影响,在深中通道耐久性设计中引入了荷载影响系数。根据以上模型和参数,计算得到100a设计保护年限的耐久性指标。针对工程施工、运营阶段可能出现的各种不确定性因素,根据深中通道的特点,提出了适合不同构件的附加防腐蚀措施,以提高其耐久性设计的安全裕度。关键词:深中通道;混凝土结构;耐久性设计;附加防腐蚀措施;安全裕度中图分类号:TG174文献标志码:A文章编号:1005-748X(2022)09-0088-07DurabilityDesignforConcreteStructureinShenzhen-ZhongshanBrigeWANGKangchen1,FANGXiang2,3,FANZhihong2,3,ZENGJunjie2,3,WANGPengsheng2,3(1.GuangdongProvincialHighwayConstructionCo.,Ltd.,Guangzhou510623,China;2.CCCCFourthHarborEngineeringInstituteCo.Ltd.,Guangzhou510230,China;3.KeyLaboratoryofDurabilityTechnologyforHarborandMarineStructureMinistryofCommunications,PRC,Guangzhou510230,China)Abstract:Shenzhen-ZhongshanBrigeisalandmarkimportantsea-crossingproject.Thedurabilityproblemoftheprojectisprominent.TheenvironmentofShenzhen-ZhongshanBrigeissimilartothatofHongKongZhuhai-MacauBridge.Thus,thedurabilitydesignmethodsbasedonreliabilitytheoryusedforHongKongZhuhai-MacauBridgewereutilizedforShenzhen-ZhongshanBrige.AndtheparametersinthedesignmodelsuchaschloridediffusioncoefficientandprotectivelayerthicknesssafetymarginwerefurtherrevisedaccordingtothedataobtainedfromtheexposuretestandengineeringconstructiondataofHongKong-Zhuhai-MacauBridge.Consideringtheinfluenceofloadonthechloridepenetrationrate,loadinfluencecoefficientwasintroducedinthedurabilitydesignofShenzhen-Zh...
