抄録
3D FEM has been commonly used for analyzing complicated soil-structure interaction problems thanks to the fast development of computer technology and geotechnical softwares. The 2D analysis is favorable to be performed in the conceptual design. However in many cases the 2D analysis can hardly simulate a real 3D situation. In this paper such a case is presented, a vertical shaft constructed in a slope beside water. The main purpose of the analysis is to clarify if the soil movements due to the shaft construction may cause damages to the adjacent existing structures. The soil displacements obtained from the 2D analysis are extremely large and tieback anchors must be needed to keep the shaft stable. Due to 3D effects the displacements become much smaller and more realistic.
