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| Study on electro-osmotic conductivity of Hangzhou silty soil |
| LUO Zhanyou1，2，TAO Yanli1，2，ZHOU Jian2，ZOU Baoping1，ZHU Hang1 |
| (1. School of Civil Engineering and Architecture，Zhejiang University of Science and Technology，Hangzhou，Zhejiong 310023，China；2. Research Center of Coastal and Urban Geotechnical Engineering，Zhejiang University，Hangzhou，Zhejiong 310058，China) |
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Abstract Using the modified Miller Soil Box，a series of experiments for Hangzhou silty soil were conducted under three different levels of initial water content and salt content. In order to obtain the variation discipline and distribution feature of soil electro-osmotic conductivity，experiment results were interpreted from the perspectives of the overall soil conductivity as well as the regional soil conductivity. Under different initial water content，it is demonstrated that the overall soil conductivities are adjacent and decrease during electro-osmosis，meanwhile the overall soil conductivities change linearly with spot water content and the change rate decreases with increasing initial water content. Under different initial salt content，a variation of first increasing to the peak and then decreasing to the balance is observed for the overall soil conductivity. The peak value is higher and appears later with higher initial salt content while the overall soil conductivities are similar at later stages of electro-osmosis. It is also found that the inhomogeneity of the soil conductivity distribution firstly increases and then decreases during electro-osmosis and huge difference exists between the soil conductivity near the cathodic region and other regions. Under varied initial water content or salt content，the soil conductivity distributions vary at earlier stages of electro-osmosis and are similar at later stages of electro-osmosis. The obtained results can further reveal the electro-osmotic mechanism and provide references for the design and calculation methods of electro-osmotis technique.
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2019, Vol. 38 
