Experimental comparison of electroosmotic consolidation of wenzhou dredged clay sediment using intermittent current and polarity reversal

被引:40
作者
Fu, Hongtao [1 ,2 ,3 ]
Fang, Ziquan [1 ]
Wang, Jun [1 ,2 ,3 ]
Chai, Jinchun [4 ]
Cai, Yuanqiang [5 ]
Geng, Xueyu [6 ]
Jin, Jinqiang [7 ]
Jin, Fangyi [8 ]
机构
[1] Wenzhou Univ, Coll Architecture & Civil Engn, Wenzhou, Zhejiang, Peoples R China
[2] Wenzhou Univ, Key Lab Engn & Technol Soft Soil Fdn & Tideland R, Wenzhou, Zhejiang, Peoples R China
[3] Wenzhou Univ, Innovat Ctr Tideland Reclamat & Ecol Protect 10, Wenzhou, Zhejiang, Peoples R China
[4] Saga Univ, Dept Civil Engn & Architecture, Saga, Japan
[5] Zhejiang Univ, Minist Educ, Key Lab Soft Soils & Geoenvironm Engn, Hangzhou, Zhejiang, Peoples R China
[6] Univ Warwick, Sch Engn, Coventry, W Midlands, England
[7] Oufei Dev & Construct Investment Grp Co Ltd, Dept Engn Supervis, Wenzhou, Peoples R China
[8] Oufei Econ Dev & Investment Co Ltd, Wenzhou, Peoples R China
关键词
Dredged clay sediment; electroosmosis; intermittent current; polarity reversal; soil consolidation; SOIL; IMPROVEMENT; ELCTROOSMOSIS;
D O I
10.1080/1064119X.2017.1326992
中图分类号
P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
The electroosmosis method is regarded especially suitable for the disposal of dredged clay sediment, but its excessive power consumption and electrode corrosion has limited its widespread application. Thus, intermittent current and polarity reversal are applied to offset its drawbacks. This study aims to examine the consolidation effect and internal relationship between the two approaches and optimize their time settings. Laboratory tests were performed with the same intermittent ratio and different reversal ratios. The test results demonstrated that intermittent current with comparatively greater intermittent times and a higher reversal ratio achieved a better drainage effect during the electroosmosis process and soil uniformity after test and the drainage in the reverse direction was lesser than that in the forward direction. The drainage effect during the power-off mode for 1 h was equivalent to that in the reverse electrifying mode for 0.2-0.25 h. Sharp increases in the current were induced by each intermittent current and polarity reversal. Although the polarity reversal approach improved the drainage effect, it partly increased the energy consumption. Compared with the intermittent current approach, reducing the reverse electrifying period to improve soil consolidation is feasible for application to engineering practice.
引用
收藏
页码:131 / 138
页数:8
相关论文
共 42 条
  • [1] [Anonymous], P 8 EUROPEAN C SOIL
  • [2] [Anonymous], 2015, GEOSYNTHETICS 2015
  • [3] APPLICATION OF ELECTRO-OSMOSIS TO A FOUNDATION PROBLEM IN A NORWEGIAN QUICK CLAY[J]. BJERRUM, L;MOUM, J;EIDE, O. GEOTECHNIQUE, 1967(03)
  • [4] Burnotte F, 2004, CAN GEOTECH J, V41, P1038, DOI [10.1139/t04-045, 10.1139/T04-045]
  • [5] Experimental tests on effect of deformed prefabricated vertical drains in dredged soil on consolidation via vacuum preloading[J]. Cai, Yuanqiang;Qiao, Huanhuan;Wang, Jun;Geng, Xueyu;Wang, Peng;Cai, Ying. ENGINEERING GEOLOGY, 2017
  • [6] Enhancement Of Electro-Osmotic Flow During The Electrokinetic Treatment Of A Contaminated Soil[J]. Cameselle, Claudio. ELECTROCHIMICA ACTA, 2015
  • [7] IMPROVEMENT OF SENSITIVE SILTY CLAY BY ELECTROOSMOSIS - DISCUSSION[J]. CASAGRANDE, DR;CASAGRANDE, L;CASTRO, G. CANADIAN GEOTECHNICAL JOURNAL, 1986(01)
  • [8] Casagrande L., 1949, GEOTECHNIQUE, V1, P159, DOI DOI 10.1680/GEOT.1949.1.3.159
  • [9] Casagrande L., 1981, BRIT COL P 10 INT C, V2, P607
  • [10] Chappell B. A., 1975, J GEOTECHNICAL ENG D, V5, P58