矩形顶管施工期地表沉降实测分析

矩形顶管技术作为一种地下隧道开挖方法,其施工过程不可避免地会对管节周围土体产生扰动,使土体出现卸载或加载等复杂的力学行为,引发土体产生变形。文中以南京江东门地下人行过街通道工程为背景,在矩形顶管施工区域地表布设若干沉降测点,并在顶管顶进过程中实时记录测点数据,然后对获取的数据进行了归纳分析,得到了矩形顶管施工对地表沉降的影响规律。

ANALYSIS OF SURFACE SUBSIDENCE OF RECTANGULAR PIPE JACKING DURING CONSTRUCTION

As an underground tunnel excavation method,the construction process of rectangular pipe jacking technology will inevitably disturb the soil around the pipe section,so that the soil unloading or loading and other complex mechanical behavior,which causing the soil deformation.Based on the background of Jiangdongmen underground pedestrian crossing project in Nanjing,some settlement points are arranged on the surface of the rectangle pipe jacking area,and the measured data are recorded in the process of jacking pipe.Then the data are summarized and analyzed,the effect of rectangular pipe jacking on surface subsidence is obtained.