Effect of surcharge loading rate and mobilized load ratio on the performance of vacuum–surcharge preloading with PVDs |
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| Authors: | Jun Wang Ziyang Gao Hongtao Fu Guangya Ding Yuanqiang Cai Xueyu Geng Changxin Shi |
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| Affiliation: | 1. College of Architecture and Civil Engineering, Wenzhou University, Chashan University Town, Wenzhou, 325035, China;2. Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation, Wenzhou University, Zhejiang, Wenzhou, China;3. Innovation Center of Tideland Reclamation and Ecological Protection, Wenzhou University, Wenzhou, China;4. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, 310014, China;5. Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou, China;6. School of Engineering, University of Warwick, Coventry, CV4 7AL, United Kingdom;7. Architectural, Surveying & Mapping Engineering, Jiangxi University of Science and Technology, No. 99, Hongqi Road, Ganzhou, China |
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| Abstract: | The results from three laboratory model tests performed under various vacuum and surcharge loads with PVDs are reported. Different SLRs were adopted to investigate the effect on the consolidation of dredged soil. To measure the lateral displacement, a refitted inclinometer was developed and tested. In the tests, the settlement, lateral displacement, and vane shear strength were measured, and the degree of consolidation (DOC), horizontal coefficient of consolidation (Ch), and bearing capacity were calculated. The results indicate that larger SLR values promote consolidation. The largest vane shear strength, settlement, and Ch values were all obtained under the highest SLR, and the bearing capacity under this SLR was more than double that under the lowest SLR. The DOC was found to increase with the growth of the SLR. However, considering the vacuum pressure was higher in Case-III, the influence of SLR on reinforcement effect may not be so significant. |
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| Keywords: | Geosynthetics Vacuum–surcharge preloading Dredged fill Prefabricated vertical drain Surcharge loading rate |
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