东南沿海地区混凝土隧道耐久性的调查分析

Investigation on durability of concrete tunnels in southeast coastal areas

为了解中国东南沿海地区在役混凝土隧道的耐久性现状,采用抽样的方法,对浙江省内6个城市的13座典型隧道进行了调查。对隧道竣工年份与破损程度、病害部位、主要病害进行了统计分析。结果表明:在役混凝土隧道普遍存在耐久性老化的现象;隧道的主要病害是渗漏水,达到77%;90%以上的病害部位发生在衬砌。最后提出东南沿海地区混凝土隧道结构耐久性设计的建议。

To have an overall knowledge on the durability of concrete tunnels in southeast coastal areas of China, 13 sample tunnels in 6 cities of Zhejiang Province were investigated.The main diseases, disease spot and the relationship between the degree of disease and service time of tunnel were statistically analyzed.Results indicate that the main disease of the tunnels was water leakage, reaching 77% ,more than 90% of the diseases occurred in the lining.Finally, some preliminary suggestions on durability design of coastal tunnels are proposed.