深基坑地下水对钻孔灌注桩施工的影响及对策

The Influence of Deep Foundation Pit Groundwater to Bored Grouting Pile Construction and the Countermeasures

摘要:

在城市高层及超高层建筑中，先开挖基坑后施工钻孔灌注桩的方案已被广泛应用。当原地下水位高于基坑开挖面或桩长范围内有承压水层时，就会对钻孔灌注桩施工产生不利的影响甚至造成不良后果。在分析深基坑地下水对钻孔灌注桩的不利影响的基础上，提出了相应的预防及解决措施，总结得出的经验可供类似工程参考。

Abstract:

In the construction of high-rise and super high-rise buildings in urban, the bored grouting pile construction scheme of “excavation before construction” is widely used. When the groundwater level is higher than the excavation face or there is confined water in the effective length of the pile, it would even cause harmful consequence to the bored grouting pile construction. Based on the analysis on the unfavorable influence of the groundwater to the bored grouting pile, the paper puts forward the corresponding prevention and treatment measures, the summarized experience could be available for reference to the similar engineering.