Abstract: Using the background of the deep excavation of an expansion hospital in Xiangzhou District, Zhuhai City, a three-dimensional finite element analysis model that simultaneously considers the excavation and adjacent training building is established to comprehensively simulate the effects of the excavation and the dewatering in soft soil at each construction stage on the settlement of adjacent buildings. To validate of the modeling method and the accuracy of the numerical analysis, the numerical results of the settlement trend of the surrounding soils during the excavation process are compared with the actual field monitoring data. The results indicate that the deformation of the foundation of the adjacent training building structure meets the requirements but the settlement difference between the first floor of the training structure and the ground is relatively large, which is expected to have some impact on the use of the first-floor structure. This numerical simulation method can be applied to pre-analysis of other similar engineering projects, providing valuable references for the design and construction of deep excavation projects in soft soils.

Key words: Deep Excavation in Soft Soils, Adjacent Buildings, Numerical Simulation, Settlement