长江漫滩地区复杂地质基坑施工监测技术

On the Monitoring Techniques for the Construction of Foundation Pits Under Complex Geological Conditions of the Flood Land Along the Yangtze River

介绍长江漫滩地区厚层淤泥质软土和下伏富含承压水的复杂岩土条件下,采用SMW桩和钢板桩围护结构,基坑开挖进行了地表沉降变形、桩顶水平位移、深层水平位移和钢支撑轴力监测,监测数据与现场检测数据吻合较好,并将数据及时反馈,指导基坑开挖,以确保施工安全。

The construction of foundation pits under the complex geological conditions of the thick soft mud in the flood land a-long the Yangtze River, under which lies pressure--bearing water, by means of the protective structures of SMW plies and steel sheet piles. During the excavation for the foundation pits, the settlement and deformation of the ground, the horizontal displace- ment of the pile top,the deep horizontal displacement, and the axial forces of the steel struts are monitored. And the monitored data are found to be in full agreement with those measured at the site. Those data are fed back in time to guide the excavation for the foundation pits so as to ensure the safe construction.