长江漫滩区逆作法施工超深基坑支护结构变形受力分析

Deformation and Stress Analysis of Supporting Structure of Super Deep Foundation Excavation by Top-down Method in Yangtze River Floodplain Area

现场监测是确保复杂地质条件下基坑安全施工最直接的手段之一。通过对现场监测数据的处理分析,可以及时调整设计及施工方案。针对长江漫滩区域,以长江五桥江南工作井超深基坑为依托,分别研究其围护墙深层水平位移、地表沉降、支撑轴力及立柱桩沉降等支护结构监测数据随基坑开挖进程的变化规律。

Field monitoring is one of the most direct means to ensure the safe construction of foundation excavation under complex geological conditions.Through the processing and analysis of on-site monitoring data,the design and construction scheme can be adjusted in time.Based on the super deep foundation excavation of Jiangnan working well of the fifth Yangtze River Bridge in the floodplain area of the Yangtze River,the monitoring data of retaining wall deep horizontal displacement,surface settlement,supporting axial force and column pile settlement with the excavation process of foundation excavation are studied respectively.