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Effect of tamping interval on consolidation of dredged slurry using vacuum preloading combined with dynamic consolidation |
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| Authors: | Zhou You Cai Yuanqiang Yuan Guohui Wang Jun Fu Hongtao Hu Xiuqing Geng Xueyu Li Mingfeng Liu Jingyun Jin Haisheng |
| Institution: | 1.College of Civil Engineering and Architecture, Wenzhou University, Chashan University Town, Wenzhou, 325035, China ;2.Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou University, Wenzhou, China ;3.College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, 310014, China ;4.School of Engineering, University of Warwick, Coventry, CV4 7AL, UK ;5.Ruian Economic Development Zone Development Co., Wenzhou, Zhejiang, China ;6.Wenzhou Oufei Economic Development and Investment Co., Ltd, Wenzhou, Zhejiang, China ; |
| Abstract: | The effect of combining vacuum preloading and low-energy dynamic consolidation is predominantly controlled by the tamping interval time. It is, therefore, imperative to identify a suitable parameter and optimise the tamping interval time. In this study, the effect of the tamping interval time on the consolidation of slurries was investigated by conducting laboratory model tests. Consequently, various tamping interval times were obtained by controlling the dissipation of pore water pressure at different levels of 20%, 40%, 60%, 80%, and 100% to determine the optimal interval time. In terms of surface settlement variation, dissipation of pore water pressure, and distributions of the water content and shear strength variation profile, it was shown that a rubber soil state was reached at a dissipation rate of 20% pore water pressure. When the tamping interval time was set to a dissipation rate of 80% pore water pressure, the consolidation effect was optimal. |
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