氯盐腐蚀城市隧道结构耐久性分析及经济评估  

Urban Tunnel Structure' s Durability Analysis and Life Cycle Cost Assessment Under Chloride Attack

作　　者：唐孟雄 陈晓斌[1,2] 

机构地区：[1]广州市建筑科学研究院有限公司,广州510440 [2]中南大学土木建筑学院,长沙410075

出　　处：《广州建筑》2010年第1期2-6,共5页GUANGZHOU ARCHITECTURE

基　　金：中国博士后科学基金项目(20080440996);广州市建设科技基金项目(07y00091)

摘　　要：采用两阶段结构寿命理论,通过试验确定了一阶段寿命预测参数,计算了氯盐侵蚀下城市隧道结构两阶段寿命,说明了锈胀开裂时间取定值(Tp=6a)及临界氯离子含量取为0.06%的可行性。采用周期寿命评估理论(LCA)对常用防止氯盐腐蚀的结构耐久性措施进行了全周期寿命经济评估,评估计算结果分析指出掺入硅灰和钢筋阻锈剂的防护措施具有显著经济效益,为工程养护提供了指导性意见。The two phases theory for the structure＇ s service life was adapted for the urban tunnel＇ s durability analysis and the parameters for the first phase life service prediction were identified by the tests. The application showed that the critical chloride content Ccr = 0.06% and propagation time Tp=6a were feasible in practice. Some techniques to promoted the tunnel＇ s durability were presented and the each techniques＇ total costs were evaluated by LCA method. The calculation results showed that the silica fume and inhibitor compositive method had obvious economical benefit among these durability techniques, which supplied reference for the project maintaining.

关 键 词：城市隧道 结构耐久性 寿命组成 周期寿命评估 

分 类 号：U457[建筑科学—桥梁与隧道工程]