Abstract: Because of the limited conditions of the surrounding environments and the operating requirements, most of the foundation pits are asymmetric cylindrical shape. The design and analysis methods are proposed based on an asymmetric cylindrical foundation pit, which is 25 m in depth and 50 m in diameter and constructed by using asymmetric cylindrical bracing as a horizontal support. 2D and 3D methods are studied. The results indicate that a stiffness-reduced coefficient kfor the 2D method for beams on elastic foundation should be considered to get reasonable results.