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电渗处理软基的电极转换规律试验研究

沈扬, 徐海东, 尤延锋

沈扬, 徐海东, 尤延锋. 电渗处理软基的电极转换规律试验研究[J]. 岩土工程学报, 2015, 37(zk1): 65-71. DOI: 10.11779/CJGE2015S1014
引用本文: 沈扬, 徐海东, 尤延锋. 电渗处理软基的电极转换规律试验研究[J]. 岩土工程学报, 2015, 37(zk1): 65-71. DOI: 10.11779/CJGE2015S1014
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SHEN Yang, XU Hai-dong, YOU Yan-feng. Cyclic electrode conversion law in treatment of soft soil foundation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(zk1): 65-71. DOI: 10.11779/CJGE2015S1014
Citation: SHEN Yang, XU Hai-dong, YOU Yan-feng. Cyclic electrode conversion law in treatment of soft soil foundation[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(zk1): 65-71. DOI: 10.11779/CJGE2015S1014
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电渗处理软基的电极转换规律试验研究  English Version

  • 1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098; 2. 河海大学岩土工程科学研究所,江苏 南京 210098

基金项目: 长江学者和创新团队发展计划资助项目（IRT1125）; 中央科研业务费重点培育项目（2014B04914）
详细信息
    作者简介:

    沈 扬(1980- ),男,博士,副教授,研究方向为土的基本工程特性、地基处理。

Cyclic electrode conversion law in treatment of soft soil foundation

  • 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China

摘要

    摘要
  • 摘要: 电渗处理软基过程中,为探寻电极转换周期规律,运用耐腐蚀的新型EKG电渗排水板分别进行了等时间周期、等排水量的电极转换试验。前者以单元土体为模型,通过观测电流、排水量随电极转换产生的变化以及数据分析,证明了等时间周期的电极转换不利于电渗排水;而后一组平行试验是以长方形土体为一维模型,控制等排水量以进行电极转换,记录电极转换时间以及周期并将数据进行数值拟合,揭示出一种呈指数函数的拟合曲线,并且运用铁作为电极材料也能得到理想的电极转换周期规律和相近的排水效果,但铁耐腐蚀性能较差,不可长期使用。最后将电极转换与常规电渗试验所得土体含水率和电导率分布示意图进行对比,证实了EKG电渗排水板进行等排水量的电极转换试验能获得处理均匀的土体,为EKG材料代替铁在电渗领域的运用提供可靠的试验依据。
    Abstract: In treatment of soft soil foundation by electro-osmotic drainage, to explore the electrode conversion cycle, the equal-time and equal-drainage-volume electrode conversion tests are performed by using a new kind of corrosion-resisting EKG drainage board. In the former test, unit soil is given as the model, change of currents and displacement is observed, and equal-time electrode conversion is proved to be not conducive. Rectangular shaped soil is regarded as an one-dimensional model and equal drainage volume is controlled by switching electrode in another parallel test, where electrode conversion time and cycle are recorded for numerical fitting, and an exponential curve fitting is revealed. In the same way, ideal electrode conversion cycle law and analogous drainage volume can be easily got by iron, but the iron cannot afford long-time electro-osmosis because of corrosion. Finally, by measuring the soil moisture content and electric conductivity after electrode conversion and conventional electro-osmosis tests, distribution diagrams of soil moisture content and electric conductivity are compared. It’s found that the equal-drainage-volume electrode conversion test by EKG drainage board can obtain processed homogeneous soil, which can provide reliable experimental basis for the application of EKG drainage board instead of iron in the electric field.
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    • 参考文献(10)
  • [1] ESTABRAGH A R, NASEH M, JAVADI A A. Improvement of clay soil by electro-osmosis technique[J]. Applied Clay Science, 2014, 95: 32-36.
    [2] KALUMBA D, GLENDINNING S S, ROGERS C D F, et al. Dewatering of tunneling slurry waste using electrokinetic geosynthetics[J]. Journal of Environmental Engineering, ASCE, 2009, 135(11): 1227-1236.
    [3] 李 瑛. 吹填土地基电渗固结试验和理论研究[D]. 杭州: 浙江大学, 2011. (LI Ying. Experimental and theoretic study on electro-osmotic consolidation of soft clay foundation[D]. Hangzhou: Zhejiang University, 2011. (in Chinese))
    [4] FOURIE A B, JOHNS D G, JONES C J F P. Dewatering of mine tailings using electrokinetic geosynthetics[J]. Canadian Geotechnical Journal, 2007, 44(2): 160-172.
    [5] 胡俞晨, 王 钊, 庄艳峰. 电动土工合成材料加固软土地基试验研究[J]. 岩土工程学报, 2005, 27(5): 582-586. (HU Yu-chen, WANG Zhao, ZHUANG Yan-feng. Experimental studies of electro-osmotic consolidation of soft clay using EKG electrodes[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(5): 582-586. (in Chinese))
    [6] WAN T V, MITCHELL J K. Electro-osmotic consolidation of soils[J]. Journal of the Geotechnical Engineering Division, ASCE, 1976, 102(5): 473-491.
    [7] LO K Y, INCULET II, HO K S. Electro-osmotic strengthening of soft sensitive clays[J]. Canadian Geotechnical Journal, 1991, 28(1): 62-73.
    [8] 王协群, 邹维列. 电渗排水法加固湖相吹填土的试验研究[J]. 武汉理工大学学报, 2007, 29(2): 95-99. (WANG Xie-qun, ZOU Wei-lie. Experimental research on electro-osmotic consolidation of lacustrine clay[J]. Journal of Wuhan University of Technology, 2007, 29(2): 95-99. (in Chinese))
    [9] 李一雯. 电极布置形式对电渗效果的试验研究[D]. 杭州: 浙江大学, 2013. (LI Yi-wen. Experimental research on the effect of electrodes array to electro-osmotic dewatering[D]. Hangzhou: Zhejiang University, 2011. (in Chinese))
    [10] LOO J A, JONES H K, UDSETH H R, et al. Capillary zone electrophoresis-mass spectrometry with electrospray ionization of peptides and proteins[J]. Journal of Microcolumn Separations, 1989, 1(5): 223-229.
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出版历程
  • 收稿日期:  2015-03-25
  • 发布日期:  2015-07-24

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