Consolidation Considering Clogging Effect under Uneven Strain Assumption
Publication: International Journal of Geomechanics
Volume 21, Issue 1
Abstract
In land reclamation projects, the vacuum preloading method has been widely used to strengthen dredged fills by removing water. However, during the improvement process, clogging inevitably occurs in the drains and soils, hindering water drainage and causing inhomogeneous consolidation results. Therefore, it is essential to evaluate the effect of clogging on the consolidation behavior of dredged slurry at different radii. In this study, analytical solutions are derived under an uneven strain assumption to calculate the consolidation in the clogging zone and the normal zone, with time-dependent discharge capacity and clogging in the soil considered. Results calculated by the proposed solutions indicated that the clogging effect slows down the development of consolidation, reduces the final consolidation degree, and increases the difference between consolidations at different radii. It is found that the influence of the clogging effect's varies with the speed of the discharge capacity decay, the value of the initial discharge capacity of the drain, the permeability, and the radius of the clogging zone. Finally, a practical application of the proposed solution is discussed, and the proposed solution is suggested for the calculation of consolidation when treating high-water-content slurry.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
This work was supported by the National Key R&D Program of China (Grant Nos. 2017YFE0119500 and 2016YFC0800200), the Projects of International Cooperation and Exchanges NSFC (Grant No. 51620105008), the program of the China Scholarships Council (No. 201906320247), the National Natural Science Foundation of China (Grant Nos. 51678319, 51879234 and 51978533), the Natural Science Foundation of Shandong Province (Grant No. ZR2016EEM40), and funding from the European Union’s Horizon 2020 research and innovation program Marie Skłodowska–Curie Actions Research and Innovation Staff Exchange (RISE) (Grant No. 778360).
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Published In
International Journal of Geomechanics
Volume 21 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 26, 2020
Accepted: Aug 23, 2020
Published online: Nov 2, 2020
Published in print: Jan 1, 2021
Discussion open until: Apr 2, 2021
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