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| EXPERIMENTAL STUDY OF CONSOLIDATION OF SOFT CLAY USING ELECTRO-OSMOSIS METHOD |
| JIAO Dan1，2，GONG Xiaonan1，LI Ying1 |
| (1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering，Zhejiang University，Hangzhou，Zhejiang 310058，China；2. College of Science，Xi?an University of Architecture and Technology，Xi?an，Shaanxi 710055，China) |
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Abstract A laboratory tests programme of soft clay with axisymmetric operative condition under different initial conditions and power conditions was conducted on the self-made electro-osmosis consolidation apparatus. Electric current，electric potential，drainage，shear strength，moisture content and settlement were monitored in the electro-osmotic process. After analyzing and comparing the consolidation characteristics of soft clay，conclusions can be obtained as follows：(1) Electro-osmosis method can effectively improve the soft clay foundation through reducing moisture content，improving shear strength and reducing post-construction settlement and so on. (2) The electro-osmosis effect of soil with higher voltage and higher moisture content is better than that of soil with lower voltage and lower moisture content. (3) Comparing with continual current，intermittent current can increase electro-osmotic effect and has higher electric energy efficiency when moisture content and voltage are similar. Moreover，it can lead to more uniform treating effect after electro-osmosis. (4) Electro-osmosis also brings negative impacts including electrode corrosion which is less under lower voltage or intermittent current.
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Received: 15 January 2010
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2011, Vol. 30 
