Case study of settlement of adjacent buildings caused by excavation of a deep foundation pit

During the excavation process of foundation pits, it is an important mission for the supporting system to ensure the deformation and settlement of the surrounding buildings. Based on the field monitoring results of a deep foundation pit with excavation depth of about 12.6 m during construction process, the development process of the induced settlement and deformation of the adjacent buildings is analyzed as well as its relationship with the geological conditions, excavation construction sequence, horizontal displacement of supporting structures and the basic types of neighboring buildings. The results show that the soil loss between supporting piles and improper construction sequence are the basic reason for large settlement of the adjacent buildings with shallow foundations. Powerful supporting system, effective water curtain and correct construction sequence are the key to control the influence of deep excavation on the adjacent buildings.