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Arching in geogrid-reinforced pile-supported embankments over silty clay of medium compressibility: Field data and analytical solution
Zhang, Chonglei1,2,3; Jiang, Guanlu3; Liu, Xianfeng2,3; Buzzi, Olivier2
Corresponding AuthorLiu, Xianfeng
2016
Source PublicationCOMPUTERS AND GEOTECHNICS
ISSN0266-352X
EISSN1873-7633
Volume77Pages:11-25
SubtypeArticle
AbstractThe objective of this study is to improve the understanding of load transfer mechanism of Geogrid-Reinforced Pile-Supported Embankments (GRPS) via a new 3D analytical approach and comprehensive field tests. A full-scale embankment was built over a silty clay of medium compressibility as a part of the Liuzhou-to-Nanning High-speed Railway (LNHR) in China. Six sections of the embankment have been heavily instrumented producing comprehensive data of high quality. Field measurements evidence the existence of soil arching, membrane contribution and ground reaction, phenomena that are all contributing to load transfer mechanism. The new 3D analytical arching model accounts for a triangular arrangement of piles and, unlike existing methods, accounts for all relevant components of load transfer mechanisms. In addition, two key parameters were introduced in the model: an elastoplastic state parameter of soil arching (alpha) and a coefficient of equivalent uniform stress (beta). The former was used to satisfy the load equilibrium in case of partial arching while the latter was adopted to allow possible nonuniform vertical stress acting on the ground surface. The so-called ground reaction method was incorporated in an innovative manner to take into account the reactive support of the subsoil beneath geogrid-reinforced layer when estimating the tension development in the geogrid. Finally, the performance of the proposed model was assessed against several existing models and field measurements. Results showed that the new model presented herein outperforms existing models and satisfactorily predicts both the pile efficiency and tension development within the geogrid. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordArching Effect Analytical Method Load Transfer Embankment Piles Field Test
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.compgeo.2016.03.007
WOS Subject ExtendedComputer Science ; Engineering ; Geology
Indexed BySCI
WOS KeywordMODEL EXPERIMENTS ; MARINE CLAY ; SOIL
Language英语
Quartile3区
TOP
WOS SubjectComputer Science, Interdisciplinary Applications ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000377325600002
Funding OrganizationTechnological Research and Development Programs of the Ministry of Railways(2010G003-F) ; Chinese Scholarship Council within the China State
Citation statistics
Cited Times:46[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17379
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
2.Univ Newcastle, Fac Engn & Built Environm, Prior Res Ctr Geotech & Mat Modelling, Callaghan, NSW 2308, Australia
3.Southwest Jiaotong Univ, Sch Civil Engn, Minist Educ, Key Lab High Speed Railway Engn, Chengdu 610031, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Zhang, Chonglei,Jiang, Guanlu,Liu, Xianfeng,et al. Arching in geogrid-reinforced pile-supported embankments over silty clay of medium compressibility: Field data and analytical solution[J]. COMPUTERS AND GEOTECHNICS,2016,77:11-25.
APA Zhang, Chonglei,Jiang, Guanlu,Liu, Xianfeng,&Buzzi, Olivier.(2016).Arching in geogrid-reinforced pile-supported embankments over silty clay of medium compressibility: Field data and analytical solution.COMPUTERS AND GEOTECHNICS,77,11-25.
MLA Zhang, Chonglei,et al."Arching in geogrid-reinforced pile-supported embankments over silty clay of medium compressibility: Field data and analytical solution".COMPUTERS AND GEOTECHNICS 77(2016):11-25.
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