重庆来福士广场深基坑地下水的控制

Control of Groundwater for Deep Foundation Pit of Raffles City in Chongqing

目前国内基坑地下水控制主要是以高压旋喷桩为代表的注浆止水帷幕和以深井降水为代表的降水帷幕。根据重庆来福士广场深基坑工程的实际情况,通过三次注浆止水帷幕试验与降水帷幕抽水试验,表明在长江滩涂回填区,地质条件复杂、含水层厚度、分布不均匀条件下,降水帷幕效果好于高压旋喷止水帷幕和液压注浆止水帷幕。

There are two ways to manage groundwater in domestic foundation pit,which are the high pressure spraying pile represented by grouting curtain and the deep well precipitation curtain. According to the practical case of deep foundation pit of Raffles City in Chongqing,the conclusion can be drawn by three times grouting of the waterproof curtain precipitation test and the pumping test. It indicates that the effect of the rainfall curtain is better than the high- pressure sealing Jet Grouting Curtain and the hydraulic curtain,under the circumstances of the complex geological condition,the thickness and uneven distribution of aquifer.