成都纺织工业学校新建职工住宅系四楼一底混合结构,设计采用天然地基,要求基础直接砌置在天然卵石层上。基坑开挖后,大部份挖到了卵石层,但房屋地基有一个单元处在府河故道上,土质软弱松散,地下水位较高,涌水量大。抽水挖土时产生大量流砂,基坑垮塌严重。若继续施工,必将影响周围土体和邻近建筑物的安全。若改用桩 The newly-built employee housing of Chengdu Textile Industry School is a mixed structure on the fourth floor and the bottom. The design uses natural foundations and requires the foundations to be laid directly on the natural pebble layer. After excavation, most of the foundation pits were excavated to the pebble layer, but there was a unit on the foundation of the House River’s old road. The soil was weak and loose, with a high groundwater level and a large inflow of water. When pumping water to excavate, a large amount of flowing sand is produced, and the foundation pit collapses seriously. If construction continues, it will affect the safety of surrounding soil and adjacent buildings. If you use a pile