电渗法加固软土地基试验研究

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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.

Key words： soil mechanics electro-osmosis effective electric potential settlement shear strength moisture content electrode corrosion

Received: 15 January 2010

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http://www.rockmech.org/EN/Y2011/V30/IS1/3208

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