砖沉井是一种施工方便,造价低廉的基础,它适用于地质差、河塘多年填土及土层中间夹有粉砂、水位较高、开挖土方时易倒塌等地质情况。一、工程概况南钢铸造车间基础为独立杯型基础,底面积9.8平方米。车间位于多年填土的河塘上,施工前终年积水,填土深度4～6米。从地质勘探资料上看出,地基下卧层土质较好,但是压缩层、持力层较差。原设计为桩基础,由于现场不具备打桩条件,采用大开挖 Brick open caisson is a convenient construction and low cost basis. It is applicable to geological conditions such as poor geological conditions, years of filling in Hetang and silty sand in the middle of the soil layer, high water level, and easy collapse when excavating earthwork. I. Project Overview The foundation of the Nansteel foundry workshop is an independent cup base with an area of ​​9.8 square meters. The workshop is located on the ponds and ponds that have been filled for many years. Water is accumulated all year round before construction and the filling depth is 4 to 6 meters. From the geological prospecting data, it can be seen that the foundation soil under the foundation is better, but the compression layer and bearing layer are poor. The original design was pile foundation, because the site did not have piling conditions, using large excavation