在软土地区一大型基坑中，同时采用了竖向斜撑对水泥搅拌桩重力式挡土墙进行加强和单纯采用重力式挡土墙两种基坑围护形式。实践证明，采用竖向斜撑后，可以降低重力式挡土墙围护造价，而且提高了围护结构抗倾覆可靠性。单纯采用重力式挡土墙是不经济的。 In a large-scale foundation pit in the soft soil area, the vertical bracing is adopted to reinforce the gravity retaining wall of the cement mixing pile and to simply adopt the retaining structure of two types of foundation pit with the gravity retaining wall. Practice has proved that the use of vertical bracing, can reduce the cost of retaining wall gravity retaining wall, but also improve the reliability of the envelope against overturning. Purely using gravity retaining wall is uneconomical.