电渗法加固软土地基试验研究

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摘要在自制的电渗固结装置上，进行轴对称工况软黏土不同初始条件及通电条件下的电渗试验。通过监测电渗过程中的电流、电势、排水量、抗剪强度、含水率和沉降，对比分析不同条件下的土体电渗固结性状，并得出以下结论：(1) 电渗法对软黏土地基处理效果良好，可达到减少土体含水率、提高土体抗剪强度、减小土体工后沉降等目的；(2) 高电压及高含水率土体的电渗效果好于低电压及低含水率的土体；(3) 含水率及电压相同条件下，间歇通电时的土体电能利用率较高，且电渗后土体的整体差异性较小；(4) 电渗也会造成一定的电极腐蚀，低电压及间歇通电条件下，电极的腐蚀相对较小。

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关键词 ：土力学, 电渗, 有效电势, 沉降, 抗剪强度, 含水率, 电极腐蚀

Abstract：A laboratory tests programme of soft clay with axisymmetric operative condition under different initial conditions and power conditions was conducted on the self-made electro-osmosis consolidation apparatus. Electric current，electric potential，drainage，shear strength，moisture content and settlement were monitored in the electro-osmotic process. After analyzing and comparing the consolidation characteristics of soft clay，conclusions can be obtained as follows：(1) Electro-osmosis method can effectively improve the soft clay foundation through reducing moisture content，improving shear strength and reducing post-construction settlement and so on. (2) The electro-osmosis effect of soil with higher voltage and higher moisture content is better than that of soil with lower voltage and lower moisture content. (3) Comparing with continual current，intermittent current can increase electro-osmotic effect and has higher electric energy efficiency when moisture content and voltage are similar. Moreover，it can lead to more uniform treating effect after electro-osmosis. (4) Electro-osmosis also brings negative impacts including electrode corrosion which is less under lower voltage or intermittent current.

Key words： soil mechanics electro-osmosis effective electric potential settlement shear strength moisture content electrode corrosion

收稿日期: 2010-01-15

引用本文:

焦丹1，2，龚晓南1，李瑛1. 电渗法加固软土地基试验研究[J]. 岩石力学与工程学报, 2011, 30(S1): 3208-3216.
JIAO Dan1，2，GONG Xiaonan1，LI Ying1. EXPERIMENTAL STUDY OF CONSOLIDATION OF SOFT CLAY USING ELECTRO-OSMOSIS METHOD. , 2011, 30(S1): 3208-3216.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS1/3208

[2]	ESRIG M I. Pore pressure，consolidation and electrokinetics[J]. Journal of the Soil Mechanics and Foundations Division，1968，94(4)：899-922. " target="_blank">
[4]	WAN T Y，MITCHELL J K. Electro-osmotic consolidation of soils[J]. Journal of the Geotechnical Engineering Division，1976，102(5)：473-491. " target="_blank">
[6]	MICIC S，SHANG J Q，LO K Y，et al. Electrokinetic strengthening of a marine sediment using intermittent current[J]. Canadian Geotechnical Journal，2001，38(2)：287-302. " target="_blank">
[7]	汪闻韶. 土工问题论文选集[M]. 北京：中国建筑工业出版社，1999.(WANG Wenshao. Select works on geotechnical engineering of academician[M]. Beijing：China Architecture and Building Press，1999.(in Chinese)) " target="_blank">
[9]	陈雄峰，荆一凤，吕鑑，等. 电渗法对太湖环保疏浚底泥脱水干化研究[J]. 环境科学研究，2006，19(5)：54-58.(CHEN Xiongfeng，JING Yifeng，HUO Jian，et al. The research of environmental dredged sludge dewatering in Taihu lake by electro-osmostic[J]. Research of Environmental Sciences，2006，19(5)：54-58.(in Chinese)) " target="_blank">
[10]	ZHANG Y F，ZHAO W. Interface electric resistance of electroosmotic consolidation[J]. Journal of Geotechnical and Geoenvironmental Engineering，2007，133(12)：1 617-1 621. " target="_blank">
[11]	王协群，邹维列. 电渗排水法加固湖相软黏土的试验研究[J]. 武汉理工大学学报，2007，29(2)：95-99.(WANG Xiequn，ZOU Weilie. Experimental research on electro-osmotic consolidation of lacustrine clay[J]. Journal of Wuhan University of Technology，2007，29(2)：95-99.(in Chinese)) " target="_blank">
[14]	庄艳峰，王钊，陈轮. 边坡电渗模型试验及能量分析法数值模拟[J]. 岩土力学，2008，29(9)：2 409-2 414.(ZHUANG Yanfeng，WANG Zhao，CHEN Lun. Model test of slope reinforcement through electro-osmosis and its numerical simulation based on energy analysis method[J]. Rock and Soil Mechanics，2008，29(9)：2 409-2 414.(in Chinese)) " target="_blank">
[15]	房营光，徐敏，朱忠伟. 碱渣土的真空-电渗联合排水固结特性试验研究[J]. 华南理工大学学报：自然科学版，2006，34(11)：70-75.(FANG Yingguang，XU Min，ZHU Zhongwei. Experimental investigation into draining consolidation behavior of soda residue soil under vacuum preloading-electro-osmosis[J]. Journal of South China University of Technology：Natural Science，2006，34(11)：70-75.(in Chinese)) " target="_blank">
[1]	CASAGRAND L. Electroosmosis in soils[J]. Geotechnique，1949，1(3)：159-177. " target="_blank">
[3]	LEWIS W R，HUMPHESON C. Numerical analysis of electroosmotic flow in soils[J]. Journal of the Soil Mechanics and Foundations Division，1973，99(8)：603-616. " target="_blank">
[5]	SHANG J Q. Electroosmosi-enhanced preloading consolidation via vertical drains[J]. Canadian Geotechnical Journal，1998，35(3)：491-499. " target="_blank">
[8]	曾国熙，高有潮. 软黏土的电化学加固(初步试验结果)[J]. 浙江大学学报：工学版，1956，(2)：12-35.(ZENG Guoxi，GAO Youchao. Electrochemical hardening of soft clay(primary test results)[J]. Journal of Zhejiang University：Engineering Science，1956，(2)：12-35.(in Chinese)) " target="_blank">
[12]	邹维列，杨金鑫，王钊. 电动土工合成材料用于固结和加筋设计[J]. 岩土工程学报，2002，24(3)：319-322.(ZOU Weilie，YANG Jinxin，WANG Zhao. Design methods of electro-kinetic geosynthetics for consolidation and soil reinforcement[J]. Chinese Journal of Geotechnical Engineering，2002，24(3)：319-322.(in Chinese))
[13]	胡俞晨，王钊，庄艳峰. 电动土工合成材料加固软土地基实验研究[J]. 岩土工程学报，2005，27(5)：582-586.(HU Yuchen，WANG Zhao，ZHUANG Yanfeng. Experimental studies on electro- osmotic consolidation of soft clay using EKG electrodes[J]. Chinese Journal of Geotechnical Engineering，2005，27(5)：582-586.(in Chinese))
[16]	高志义，张美燕，张健. 真空预压联合电渗法室内模型试验研究[J]. 中国港湾建设，2000，(5)：58-61.(GAO Zhiyi，ZHANG Meiyan，ZHANG Jian. Laboratory model test of vacuum preload in combination with electro-osmotic method[J]. China Harbour Engineering，2000，(5)：58-61.(in Chinese)) " target="_blank">
[17]	崔红军，吕小林，王孝明. 湖积软土地基的处理方法[J]. 岩石力学与工程学报，2004，23(17)：2 998-3 002.(CUI Hongjun，LU Xiaolin，WANG Xiaoming. Reinforcement method of lacustrine soft soil foundation[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(17)：2 998-3 002.(in Chinese)) " target="_blank">