Case Study on the Deformation Coupling Effect of a Deep Foundation Pit Group in a Coastal Soft Soil Area

Simultaneous construction of adjacent projects may lead to emergencies in a foundation pit group, which significantly affects the deformation and safety pits. In this study, characteristics deep group mutual interactions among pits were observed by monitoring system during excavation. Field data including lateral deflections enclosure pile, ground subsidence, as well vertical column movements, analyzed compared with individual excavations Shanghai. The field showed that excavation reduced structure, caused reduction active earth pressure acting on retaining pile. Furthermore, excavated later upward movements soil between them. However, earlier had negligible influence later. Due optimized sequence special was controlled.