Journal
KSCE JOURNAL OF CIVIL ENGINEERING
Volume 24, Issue 9, Pages 2599-2609Publisher
KOREAN SOCIETY OF CIVIL ENGINEERS-KSCE
DOI: 10.1007/s12205-020-1900-6
Keywords
Pozzolanic reaction; Electromigration; Flocculation; Electroosmosis; Vacuum preloading; Dredged fill
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Funding
- National Key R&D Program of China [2016YFC0800200]
- National Natural Science Foundation of China [51778500, 51778501, 51620105008]
- Zhejiang Province Natural Foundation projects of China [LR18E080001, LY20E080029]
- Key Research and development program of Zhejiang Province [2018C03038]
- Program of Science and Technology of Wenzhou [S20160009]
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Vacuum-electroosmosis is a common method of foundation treatment; however, it is disadvantaged by fine soil particles clogging the drainage plate. To overcome this issue, this study treated the dredged fill from vacuum-electroosmosis with different additives. The parameters of discharged water, current, water content, and shear strength of soils treated with different amounts of Ca(OH)(2), FeCl3, and NaCl were analyzed. The results showed that different additives have different effects on the vacuum-electroosmosis method for reinforcing dredger filling. Excessive additive contents were found to have an adverse effect on vacuum-electroosmosis, and hence, optimum amounts are required for the three additives. On comparing the optimum dosage of these additives, FeCl(3)was observed to be the most energy-saving. From the aspect of anode corrosion and the costs involved, Ca(OH)(2)was the most economical. For practical engineering applications, Ca(OH)(2)was the most preferable additive. The results of this study provide guidance and scientific criteria for similar dredging foundation treatments.
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