等电势梯度下电极间距对电渗影响的试验研究

Abstract

Abstract: A 1:5 scaled model test is conducted in order to find a simple and feasible technical means to improve electro-osmotic efficiency in soft clay foundation. The test program involves two different electrode spacings which are 2m×1m and 1m×0.5m. By monitoring drainage, current intensity, voltage, water content and soil pH values, two tests are compared in terms of treatment effect, energy efficiency and electrodes corrosion. The results show that: halving the electrode spacing and keeping the voltage gradient could improve electro-osmotic treatment efficiency effectively including faster drainage rate, more reduction in water content, less energy consumption and less interface resistivity while it would also lead more changes in pH values of soil and more anodes corrosion; moreover, in the condition of halved spacing, smaller voltage drop took place at the soil-electrode interface; but the proportion of the voltage drop to supply voltage is higher.

Key words: electrode spacing, rectangular array, voltage gradient, electro-osmotic efficiency, electrode corrosion

CLC Number:

TU 443

LI Ying ，GONG Xiao-nan. Experimental research on effect of electrode spacing on electro-osmotic dewatering under same voltage gradient[J]., 2012, 33(1): 89-95.

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Experimental research on effect of electrode spacing on electro-osmotic dewatering under same voltage gradient

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