【摘要】 以某地铁深基坑工程为例,结合结构设计和工程地质条件等方面详细介绍了在南京河西软土地区如何进行深基坑降水方案的设计、风险评估及施工。工程针对该地区砂层中含淤泥质黏性土的地质状况,运用明排、轻型井点降水和管井相结合的方法,取得了较好的效果;同时就不同降水方法相结合时需要注意的问题、降水井的构造、降水的效果以及对周边环境的影响进行研究,能对类似工程提供参考。更多还原

【Abstract】 The design,risk assessment and construction of some subway’s deep foundation pit dewatering program are discussed,together with the structure design of foundation pit and geological conditions in soft clay ground of Hexi,Nanjing.Considering the geological condition as clay with sand layer mixed in mucky soil,we use a mixed dewatering method composed of open drainage method,well-points method and tube-well method in draining the groundwater of this project and it turns out a success.Some matters needed attention in mixed dewater method,the structure of dewater well and the influence on surrounding environment are discussed and these can do a little help to similar projects.更多还原