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主管单位 中华人民共和国
工业和信息化部
主办单位 哈尔滨工业大学 主编 冷劲松 国际刊号ISSN 0367-6234 国内刊号CN 23-1235/T

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引用本文:陶燕丽,周建,龚晓南,陈卓.间歇通电模式影响电渗效果的试验[J].哈尔滨工业大学学报,2014,46(8):78-83.DOI:10.11918/j.issn.0367-6234.2014.08.013
TAO Yanli,ZHOU Jian,GONG Xiaonan,CHEN Zhuo.Experimental research of the influence of current intermittence on electro-osmotic effect[J].Journal of Harbin Institute of Technology,2014,46(8):78-83.DOI:10.11918/j.issn.0367-6234.2014.08.013
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间歇通电模式影响电渗效果的试验
陶燕丽1,2, 周建2, 龚晓南2, 陈卓2
(1.天津市软土特性与工程环境重点实验室, 300384 天津; 2.浙江大学 滨海和城市岩土工程研究中心, 310058 杭州)
摘要:
为了研究间歇通电模式对电渗加固效果的影响,采用实验室一维模型箱,在不同通断模式下开展电渗试验.试验分两个阶段,第一阶段固定通断时间比,研究不同通电周期对电渗的影响,同时与连续通电对比;第二阶段,固定通电周期,研究通断时间比对电渗的影响.测量试验过程中的电流、阴极排水量,试验结束时的抗剪强度以及含水量分布,并给出不同组试验的阳极板腐蚀图.结果表明:间歇通电能否有效以及通电周期和通断比对电渗效果的影响会因试验时间的不同而存在差异;采用适当的通电周期和通断时间比,间歇通电可以减缓电极腐蚀,提高电渗效果.文章最后对已有文献中的分歧作出了解释,并指出电渗法实际工程应用中,建议通电周期选取1~4 h,通断时间比取2.0.
关键词:  间歇通电  电渗效果  通电周期  通断时间比
DOI:10.11918/j.issn.0367-6234.2014.08.013
分类号:TU447
基金项目: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).
Experimental research of the influence of current intermittence on electro-osmotic effect
TAO Yanli1,2, ZHOU Jian2, GONG Xiaonan2, CHEN Zhuo2
(1. Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, 300384 Tianjin , China; 2.Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University, 310058 Hangzhou, China)
Abstract:
Series of one-dimensional electro-osmotic laboratory tests were conducted in a self-made tank to investigate the impact of current intermittence on electro-osmotic effect. The tests were divided into two stages. In the first stage, time ratio of power on and off was fixed to study the effects of different power on periods, which were also compared with the result of continuous conduction. In the second stage, the power on period was fixed to study how different time ratios of power on and off affect electro-osmotic process. Currents and drainages were monitored every certain time during the test, while the distributions of shear strength, water content were measured after the test. The results suggest that the testing time possesses key influence on the effectiveness of current intermittence and the distinction of electro-osmotic effects obtained. With appropriate power on period and time ratio, current intermittence can result in lighter electrode corrosion and enhance electro-osmosis efficiency excessively. Finally, reasonable explanations of the different results in existing literature were given, and it is recommended to employ current intermittence for engineering application of the electro-osmosis technique, with the optimal power on period and time ratio of power on and off being 1-4 h and 2.0 respectively.
Key words:  current intermittence  electro-osmosis effect  power on period  time ratio of power on and off

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