Study on Coupling Effect of a Complex Deep Foundation Pit Group Excavation in a Soft Soil Area

With the continuous improvement of China's urbanization, the high-rise buildings, subways, large commercial complexes, and other projects are increasing, and the involved deep foundation pit engineering is also growing. Meanwhile, due to the sensitive geological environment and complex traffic conditions, the deep foundation pit project in urban areas faces higher technical challenges and construction risks, especially in soft soil areas. In this paper, a complex deep foundation pit group is analyzed by the numerical simulation, and different construction time sequence schemes of the foundation pit group are considered to study the differences in coupling effect on the lateral wall deflection, basal heave de-formation, and internal support axial force. Finally, some suggestions are put forward for the monitoring and construction of this project.