Effect of surcharge loading rate and mobilized load ratio on the performance of vacuum–surcharge preloading with PVDs. Issue 2 (April 2019)

• Record Type: Journal Article
• Authors: Wang, Jun; Gao, Ziyang; Fu, Hongtao; Ding, Guangya; Cai, Yuanqiang; Geng, Xueyu; Shi, Changxin
• Is Part Of: Geotextiles and geomembranes. Volume 47:Issue 2(2019:Apr.)
• Page Start: 121
• Page End: 127
• Publication Date: 2019-04
• Subjects: Geosynthetics -- Vacuum–surcharge preloading -- Dredged fill -- Prefabricated vertical drain -- Surcharge loading rate; Membranes (Technology) -- Periodicals; Membranes (Technology); Periodicals; Electronic journals; 624.189
• DOI: 10.1016/j.geotexmem.2018.12.001
• Languages: English
• ISSNs: 0266-1144

Abstract

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.