非全封闭止水的深基坑涌水量计算的思考

Thinking about the Calculation of Deep Foundation Pit's Gushed out Water

现有深基坑涌水量的计算公式,是沿用管井的抽水公式,将其管井半径r,扩大为基坑面积概化圆的等效半径r0,套用各种工况的管井涌水量计算式。这些公式未考虑到止水桩的存在对其影响。现就非全封闭止水桩存在的条件下,应如何分析其施工降水计算方法。1.对有非全封闭止水桩深基坑应用现有深基坑涌水量计算的几点困惑;2.在潜水地层中,有止水桩存在涌水量计算的进水模式;3.非全封闭止水深基坑涌水量计算表达式建立及其分析。供应用研究探讨。

The existing calculation formula of deep foundation pit section is used the casing well pumping formula,the casing well radius r,expanded to pit area generalized round equivalent radius r0,to use different conditions of casing well section calculation formula.These formulas without considering the existence of water stop pile of its impact.Now is not closed to stop water pile existence conditions,should figure and analyze its construction precipitation computational methods,some thinking and discussion.1.Stop water to have not fully enclosed pile deep excavation of deep foundation pit section calculation using existing confusion,2.In water-barrier stratum,have to stop water pile of two existing section calculation mode;3.Not fully enclosed check water depth excavation section computational expressions established and compared.For study.