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Effect of sand on the vacuum consolidation of dredged slurry
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Wang, Jun, Cai, Yuanqiang, Ni, Junfeng, Geng, Xueyu and Xu, Fengqi (2018) Effect of sand on the vacuum consolidation of dredged slurry. Marine Georesources & Geotechnology, 36 (2). pp. 238-244. doi:10.1080/1064119X.2017.1304473 ISSN 1064-119X.
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WRAP-Effect-sand-vacuum-consolidation-Geng-2017.pdf - Accepted Version - Requires a PDF viewer. Download (904Kb) | Preview |
Official URL: http://dx.doi.org/10.1080/1064119X.2017.1304473
Abstract
Vacuum preloading is often used to improve the geotechnical properties of dredged slurry. Although the performance of this method has improved with rapidly developing technology, soil columns usually formed on the drainage boundary induce the decrease of permeability around the boundary, thereby limiting the further development of this method. To address this issue, this paper proposes a method for pretreating the slurry combined with sand prior to vacuum consolidation. This method partially replaces the fine particles with sand to reduce the formation of soil columns. Two groups of vacuum preloading tests were performed to investigate the effect of sand content and sand grain size on the vacuum consolidation of dredged slurry. The test results revealed that for a given sand grain size, increasing the sand content of the sand-slurry mixture increased the pore water drainage and accelerated the dissipation of pore water pressure, thereby increasing the vane shear strength. In contrast, for a constant sand content, the samples containing coarse sand exhibited increased pore water drainage and accelerated dissipation of pore water pressure, thereby increasing the vane shear strength of the soil.
Item Type: | Journal Article | ||||||||||
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Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||
Library of Congress Subject Headings (LCSH): | Reclamation of land -- China, Clay , Slurry , Vacuum | ||||||||||
Journal or Publication Title: | Marine Georesources & Geotechnology | ||||||||||
Publisher: | Taylor & Francis Inc. | ||||||||||
ISSN: | 1064-119X | ||||||||||
Official Date: | 2018 | ||||||||||
Dates: |
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Volume: | 36 | ||||||||||
Number: | 2 | ||||||||||
Page Range: | pp. 238-244 | ||||||||||
DOI: | 10.1080/1064119X.2017.1304473 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 21 April 2017 | ||||||||||
Date of first compliant Open Access: | 21 March 2018 | ||||||||||
Funder: | China. Guo jia ke xue ji shu bu [Ministry of Science and Technology] (CMST), International Science and Technology Cooperation of China, Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), Project of Science and Technology of Wenzhou | ||||||||||
Grant number: | 2016YFC0800201 (National Basic Research Program of China), 2015DFA71550 (International Science and Technology Cooperation of China), 51622810, 51620105008, 51678319 (NSFC), S20140012 (Project of Science and Technology of Wenzhou) |
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