Abstract: This paper presents a case history of investigating the deformation of the surrounding soil and the supporting structures caused by the deep excavation in complex urban environments in Wuhan. The deep excavation is simulated by using the commercial finite element software PLAXIS2D. The excavation supporting structures as well as the loads imposed by adjacent railway trains and existing buildings, are reasonably simplified. The deformation of the soil mass and supporting structures within the excavation area are analyzed. The results indicate that, during the excavation process, the maximum deformation of in supporting structures adjacent to the railway side is greater than that on the side of existing buildings. The maximum vertical displacement of the soil occurs at the center of the excavation, while the maximum horizontal displacement takes place at the slope of the railway subgrade close to the excavation side. Both the deformation of the supporting structures and the soil deformation meet the relevant regulatory requirements.

Key words: Adjacent Railroad Excavation, PLAXIS2D Excavation Simulation, Excavation Support, Excavation Deformation Analysis