Electro-Osmosis in Soils
Electro-Osmosis in Soils
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DOI：
10.1680/geot.1949.1.3.159
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发表时间：
1949-06
期刊：
影响因子：
5.8
通讯作者：
I. Casagrande
中科院分区：
文献类型：
--
作者：
I. Casagrande
摘要
本文表明，从实际角度来看，对于所有土壤，水的电渗传输可假定为恒定的。发现渗透系数为\(k_e = 5×10^{-5}\)厘米/秒（每厘米1伏特时）。通过将\(k_e\)与水力渗透系数进行比较，计算出了水通过电渗可被提升的高度，并且通过实验室测试进行了测量。为此目的，构建了一种特殊的仪器。对于胶体材料，理论平衡水头与测试结果仅在施加电势后的短时间间隔内相符，这一事实归因于材料内部裂缝的产生。讨论了使孔隙水的流动偏离岩屑的可能性，并通过实际例子进行了说明。给出了几种电极布置所需能量消耗大小的一些指示。还提供了一种解释……
Summary The present paper shows that, from a practical point of view, the electro-osmotic transport of water may be assumed to be constant for all soils. The magnitude of the osmotic permeability was found to be ke=5 × 10−5 cm. per sec. for for 1 volt per cm. By comparing ke, with the hydraulic permeability the heights to which the water can be shifted by electro-osmosis were computed and also measured by laboratory tests. For this purpose a special apparatus was constructed. The fact that with colloidal materials agreement between theoretical equilibrium heads and test results exist only for the short interval of time immediately after applying an electric potential was attributed to the development of cracks within the mass of material. The possibility of diverting the flow of pore-water away from cuttings is discussed and illustrated by practical examples. Some indications are given of the magnitude of the required consumption of energy for a few arrangements of electrodes. An explanation is also offer...