Experimental Comparison of Electro-Osmotic Consolidation of Wenzhou Dredged Clay Sediment Using Intermittent Current and Polarity Reversal
Experimental Comparison of Electro-Osmotic Consolidation of Wenzhou Dredged Clay Sediment Using Intermittent Current and Polarity Reversal
复制标题
间歇电流与极性反转电渗透固结温州疏浚粘土沉积物的实验比较
DOI：
10.1080/1064119x.2017.1326992
复制
发表时间：
2017
影响因子：
2.2
通讯作者：
Yuanqiang Cai
中科院分区：
文献类型：
--
作者：
Hongtao Fu;Ziquan Fang;Jun Wang;Jinchun Chai;Yuanqiang Cai
电渗法被认为特别适用于疏浚泥质沉积物的处理，但其耗电量大、电极腐蚀严重等问题限制了其广泛应用。因此，采用间歇电流和极性反转来弥补其缺点。本研究旨在探讨两种教学方法的巩固效果和内在联系，并优化其时间设置。采用相同间歇比和不同反转比进行实验室试验。试验结果表明，间歇电流的间歇次数越多、换向比越大，电渗过程中的排水效果越好，试验后土壤的均匀性越好，且换向方向的排水量小于正向方向。断电1h的排水效果与反吹0.2- 0.25h的排水效果相当。电流的急剧增加由每个间歇电流和极性反转引起。虽然极性反转方法改善了排水效果，但它部分地增加了能量消耗。与间歇流法相比，缩短反渗时间以提高土体固结度的方法在工程实践中是可行的。
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.