超大直径泥水盾构隧道施工地面沉降实测分析

随着城市地下交通工程的迅速发展,盾构隧道在软弱土层及繁华市区地下交通建设中得到越来越广泛的应用。然而,盾构隧道施工的进步与发展并未能从根本上避免施工过程中的地表变形。本文将以上海实际工程实例为背景,利用现场监测数据,对超大直径泥水盾构隧道在不同施工阶段所引起的地表沉降大小、变形规律等问题进行分析探讨,最后将实测数据与经验公式计算结果进行对比与分析。

Analysis of ground settlement in construction of shield tunnel of super-diameter slurry

Shield tunnel is more and more widely used in urban underground traffic construction in soft soils and urban cities along with the fast development of urban traffic engineering. However, the progress and development of shield tunnel construction cannot radically avoid the surface subsidence. The paper analyzed the magnitude of surface subsidence and deformation rules in different stages owing to the construction of shield tunnel super-large diameter slurry based on the in-situ monitoring data from a current project in Shanghai. It finally carried out the contract analysis of measured data and calculated results.