在采用满铺砂垫层处理软弱地基的工程设计中,由于土方大面积开挖,边坡土体软弱无法成型且极易塌方,工程中常见处理方法是在基坑四周砌筑挡砂墙,目的是便于砂垫层施工,以保证砂垫层的施工质量。但是该做法如果处理不当,往往适得其反。某工程为住宅楼,地基是R=70kN/m2的淤泥粘土,满铺1.5m高的砂垫层。砂垫层四 In the engineering design of the soft sand foundation treated with overlay sand cushion, due to the large excavation of earthwork, the weak and unbeatable slope soil can collapse easily. The common treatment method in the project is to build masonry sand walls around the foundation pit, The purpose is to facilitate the construction of sand cushion to ensure the quality of sand cushion construction. However, this practice is often counter-productive if not handled properly. A project for residential buildings, the foundation is R = 70kN / m2 silt clay, full 1.5m high sand cushion. Sand cushion four