多级轻型井点降水在大型软土基坑施工中的应用

Application of Multi-level Light Well Point Dewatering in Large-scale Soft Soil Foundation Pit Construction

对于地下水位高于建筑物基础面的大型软土基坑工程,施工降排水方案的选择非常关键,这不仅直接关乎基坑边坡及坑底的稳定安全,也对工程施工进度和施工成本产生关键性影响。太浦河泵站工程存在大型软土基坑,其采用多级轻型井点降水方案。本文分析了太浦河泵站工程大型软土基坑降水方案的选定、设计计算、施工工艺及方法、运行管理经验、降水效果,可为类似工程提供借鉴。

For large-scale soft soil foundation pit projects where the groundwater level is higher than the foundation surface of the building,the selection of construction drainage schemes is very critical,which is not only directly relat⁃ed to the stability and safety of the slope and bottom of the foundation pit,but also has a critical impact on the con⁃struction schedule and construction cost of the project.There is a large-scale soft soil foundation pit in the Taipu Riv⁃er Pumping Station Project,which uses a multi-level light well point dewatering scheme.This paper analyzes the se⁃lection,design calculation,construction technology and method,operation and management experience,and precipi⁃tation effect of the large-scale soft soil foundation pit precipitation scheme of Taipu River Pumping Station Project,which can provide references for similar projects.