Journal Published Online: 24 May 2019
Volume 43, Issue 3

Vacuum Preloading Combined with Intermittent Electro-Osmosis for Dredged Slurry Strengthening

CODEN: GTJODJ

Abstract

Vacuum electro-osmosis is a useful method for strengthening dredged slurry; however, this technique is not widely applied because of its high power consumption and decreased efficiency in the later stages. Appropriate current intermittence is an important approach to improving the efficiency and reducing the power consumption of the electro-osmosis process. Thus, vacuum preloading combined with intermittent electro-osmosis has been proposed; however, relevant research is lacking, and the conditions for optimized current intermittence remain uncertain. In this study, laboratory experiments are performed to investigate the influence of various current intermittence frequencies on the treatment of six dredged slurry specimens using vacuum preloading combined with intermittent electro-osmosis. The experimental findings indicate that an optimal ratio of the on and off times exists, which can effectively improve soil strength and reduce power consumption. Furthermore, for the same time ratio, treatment with a comparatively short electrification period yields higher efficiency. However, an excessively small time ratio yields lesser improvement than that obtained with continuous electrification.

Author Information

Liu, Feiyu
Department of Civil Engineering, Shanghai University, Shanghai, China
Fu, Hongtao
College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, China
Zhou, Jie
Department of Civil Engineering, Shanghai University, Shanghai, China
Wang, Jun
College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, China
Cai, Yuanqiang
Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou, China
Zhao, Ran
College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, China
Lou, Xiaoming
Shanghai Geoharbour Construction Group Co., Ltd. Geoharbour Building, Shanghai, China
Jin, Yawei
Jiangsu Xiatai Geotechnical Technology Co., Ltd., Wuxi, Jiangsu, China
Yuan, Wenxi
Zhejiang Design Institute of Water Conservancy and Hydroelectric Power, Hangzhou, Zhejiang, China
Pages: 16
Price: $25.00
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Stock #: GTJ20180234
ISSN: 0149-6115
DOI: 10.1520/GTJ20180234