武汉地区某地铁车站非落底式止水帷幕深基坑降水设计

Non-bottom Waterproof Curtain in Deep Foundation Pit Dewatering Design of a Metro Station in Wuhan Area

针对武汉地区的长江I级阶地冲洪积地层,基坑工程一般采用落底式竖向帷幕治理地下水,但落底式竖向帷幕工程造价昂贵,施工工期较长,施工质量难于保证。论文结合武汉地铁2号线中山公园站基坑工程,介绍了非落底式止水帷幕结合深井(管井)减压疏干降水技术治理地下水的方案。通过具体工程研究了基坑涌水量的预测及降水设计、降水预测及降水动态控制、基坑降水对周边环境的影响预测等实际问题,为类似工程设计提供参考。

In the Yangtze River I terrace alluvial stratum of Wuhan area, the bottom vertical curtain is generally used to treatment groundwater in foundation pit engineering, but the bottom of vertical curtain is expensive, construction period is longe, the construction quality is difficult to ensure. Based on the foundation pit engineering of Zhongshan Park station in Wuhan Metro Line 2, introduced the plan of dewatering by non-bottom sealing curtain combine with deep well（pipe well） decompression and drainage groundwater technology. Through actual engineering, studied the prediction of water gushing in the foundation pit, dewatering design and prediction, dewatering dynamic control, prediction of the impact on the surrounding environment due to dewatering, provide reference for similar engineering design.