在采用满堂铺砂垫层处理软弱地基的工程设计中,由于大面积开挖,边坡土体软弱无法成形,而且极易塌方,工程上常见有在基坑四周砌筑挡砂墙的做法,目的是便于砂垫层施工,以保证砂垫层的施工质量。但是,这种做法如果处理不慎,往往却适得其反,甚至会造成事故发生。我们地区曾发生过两起基础工程事故,都是由 In the engineering design using a full-filled sand cushion to treat weak foundations, due to large-scale excavation, the slope soil is weak and cannot be formed, and it is extremely easy to landslides. There are common practices in building sand retaining walls around foundation pits. The purpose is to facilitate sand cushion construction to ensure sand cushion construction quality. However, if this approach is handled carelessly, it often backfires and even causes an accident. There have been two basic engineering accidents in our region.