上海地铁盾构隧道病害影响因素及特征分析

Analysis of the Influence Factors and Its Characteristics of Metro Shield Tunnel Defects in Shanghai

文章以上海运营地铁盾构隧道结构维护工作为研究背景,分析了导致盾构隧道病害的影响因素,统计了地铁盾构隧道各类型病害占比,并对隧道病害特征进行了分析。结果表明,上海地铁盾构隧道渗漏水病害相对较多,占比接近60%,结构损伤病害占比为33%,且较多表现为管片角部细裂缝或破损。

Based on the maintenance work of Shanghai operational metro shield tunnels,the factors resulting to the defects of shield tunnels are analyzed.The proportions of all kinds of defects in metro shield tunnels are statistical counted,and the characteristics of tunnel defects are analyzed.The proportion of leakage defect in Shanghai metro shield tunnels is relatively larger,accounting for nearly 60%of all defects,and structural defects account for 33%,which are mainly composed of fine cracks or breaking of segment corners.