间歇通电下软黏土电渗固结性状试验分析  

Experimental study on electro-osmotic consolidation of soft clay under intermittent current condition

作　　者：龚晓南[1] 焦丹[1,2] 

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]西安建筑科技大学理学院,陕西西安710055

出　　处：《中南大学学报（自然科学版）》2011年第6期1725-1730,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50879076)

摘　　要：在自制的电渗固结装置上,进行轴对称工况软黏土间歇通电和持续通电条件下的2组试验,对不同通电条件下土体电渗固结性状进行对比。研究结果表明:间歇通电下土体表面沉降变化、抗剪强度变化及含水量变化比持续通电下的均匀;间歇通电下土体有效电势高于持续通电下的土体有效电势,电能利用率较高;间歇通电下电极的腐蚀比持续通电下的电极腐蚀弱,表明间歇通电是一种比较经济、合理的电渗通电方法。Two laboratory tests for soft clay in the axisymmetric shape under intermittent current and last current condition were conducted on electro-osmotic consolidation apparatus newly developed by authors.Comparison of electro-osmotic consolidation of soil mass under different current conditions were made.The results show that change of surface settlement,shear strength and water content under intermittent current condition are more uniform than those of soil mass under last current condition.Effective potential of soil mass under intermittent current condition is higher than that under last current condition,and power utilization of the former is higher than the latter.Electrodes corrosion under intermittent current condition is less than that under last current condition,and the former method is one more economical and reasonable method of electro-osmosis.

关 键 词：电渗 表面沉降 抗剪强度 有效电势 

分 类 号：TU472.5[建筑科学—结构工程]