电渗-堆载联合气压劈裂的室内模型试验  

Laboratory model experiment of electro-osmosis combined with loading and pneumatic fracturing

作　　者：胡平川 周建[1] 温晓贵[1] 陈宇翔[1] 李一雯[1] 

机构地区：[1]浙江大学滨海与城市岩土工程中心,浙江杭州310058

出　　处：《浙江大学学报（工学版）》2015年第8期1434-1440,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51478425);浙江省滩涂围垦与岩土工程技术科技创新团队资助项目(2011R50020);浙江省交通规划设计研究院科研资助项目(2013W03);天津市软土特性与工程环境重点实验室开放基金资助项目(2011SCEEKL004)

摘　　要：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.In order to enhance the effect of electro-osmosis to deep soil,a new method named electroosmosis 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.

关 键 词：电渗 气压劈裂 室内模型试验 

分 类 号：TU443[建筑科学—岩土工程]