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| Laboratory model experiment of electro-osmosis combined with loading and pneumatic fracturing |
| HU Ping-chuan, ZHOU Jian, WEN Xiao-gui, CHEN Yu-xiang, LI Yi-wen |
| Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China |
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Abstract In order to enhance the effect of electro-osmosis to deep soil, a new method named electro-osmosis combined with loading and pneumatic fracturing was proposed. Two laboratory model experiments, one of which was electro-osmosis combined with loading and pneumatic fracturing, the other was electro-osmosis, were conducted. The results of these two experiments were compared on fracturing, current, water discharge, shear strength of the soil, water content and energy consumption. The results demonstrate that pneumatic fracturing is beneficial for electro-osmosis dewatering. Compared to the experiment of electro-osmosis combined with loading,the deep soil is better treated in the experiment of electro-osmosis combined with loading and pneumatic fracturing, which manifests that this method may be of good prospect to enhance the deep soil in electro-osmosis. However, pneumatic fracturing increases energy consumption and costs, which should be solved in the further research. In the last period of the experiment, the enhancement effect of pneumatic fracturing to electro-osmosis dewatering reduces rapidly.
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Published: 01 August 2015
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电渗-堆载联合气压劈裂的室内模型试验
为了提高电渗法对深层土体的处理效果,提出电渗-堆载联合气压劈裂.开展电渗-堆载和电渗-堆载联合气压劈裂室内模型试验,从裂缝开展、电流变化、电渗排水量、试验后土的抗剪强度以及能耗等多角度对两者进行比较.结果表明：气压劈裂对于电渗排水有一定的促进作用；电渗-堆载联合气压劈裂对于深层土体有较好的处理效果,可为如何提高电渗对深层土体的处理效果提供借鉴；但是,气压劈裂使得能耗、成本增加；试验后期,气压劈裂对于电渗排水的促进作用迅速衰减.
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