Analytical solutions to the axisymmetric consolidation of a multi-layer soil system under surcharge combined with vacuum preloading
Zhou, Wan-Huan1,2; Lok, Thomas Man-Hoi1,2; Zhao, Lin-Shuang1,2; Mei, Guo-xiong3; Li, Xiao-Bo1,2
2017-10
Source PublicationGEOTEXTILES AND GEOMEMBRANES
ISSN0266-1144
Volume45Issue:5Pages:487-498
Abstract

Surcharge combined with vacuum preloading is a common technique for accelerating the consolidation process in ground improvement. A unit cell model for the axisymmetric consolidation of a soft soil using a prefabricated vertical drain (PVD) under a surcharge, combined with vacuum preloading, is investigated in this study. Based on this model, analytical solutions for a multi-layer soil system are put forward and the explicit expressions for two-layer and one-layer systems are presented. The accuracy of the proposed solution is verified using an analytical solution available in the literature. In the parametric study, the influencing factors on the consolidation process, such as, the smear zone, the PVD spacing, the hydraulic conductivity in the radial direction, the coefficient of vacuum decrease, are taken into account. The water flow in the radial direction plays an important role in the consolidation process while the impact of the vertical flow mainly develops around the interfaces between two adjacent layers. In addition, the proposed analytical solution is applied in a case history with three different layers and the results are reasonable. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordGeosynthetics Analytical Solution Axisymmetric Consolidation Multi-layer Soil System Surcharge Combined Vacuum Preloading
DOI10.1016/j.geotexmem.2017.06.003
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000411781000009
PublisherELSEVIER SCI LTD
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Affiliation1.Univ Macau, Dept Civil & Environm Engn, Fac Sci & Technol, Room E11-1047,Ave Univ, Taipa, Macau, Peoples R China
2.UMacau Res Inst, Zhuhai, Guangdong, Peoples R China
3.Guangxi Univ, Coll Civil Engn & Architecture, Key Lab Disaster Prevent & Struct Safety, Minist Educ, Nanning, Peoples R China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Zhou, Wan-Huan,Lok, Thomas Man-Hoi,Zhao, Lin-Shuang,et al. Analytical solutions to the axisymmetric consolidation of a multi-layer soil system under surcharge combined with vacuum preloading[J]. GEOTEXTILES AND GEOMEMBRANES,2017,45(5):487-498.
APA Zhou, Wan-Huan,Lok, Thomas Man-Hoi,Zhao, Lin-Shuang,Mei, Guo-xiong,&Li, Xiao-Bo.(2017).Analytical solutions to the axisymmetric consolidation of a multi-layer soil system under surcharge combined with vacuum preloading.GEOTEXTILES AND GEOMEMBRANES,45(5),487-498.
MLA Zhou, Wan-Huan,et al."Analytical solutions to the axisymmetric consolidation of a multi-layer soil system under surcharge combined with vacuum preloading".GEOTEXTILES AND GEOMEMBRANES 45.5(2017):487-498.
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