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Lateral displacement of silty clay under cement-fly ash-gravel pile-supported embankments: Analytical consideration and field evidence
Zhang CL(张崇磊)1,2; JIANG Guan-lu1; LIU Xian-feng2; WANG Zhi-meng3
Corresponding AuthorJIANG Guan-lu
2015
Source PublicationJournal of Central South University of Technology
ISSN2095-2899
Volume22Issue:4Pages:1477-1489
Abstract

Based on back analysis of lateral displacements measured in situ by using the analytical solution, a useful method for estimating stress concentration ratio of geosynthetic-reinforced and pile-supported (GRPS) embankments was proposed. In order to validate the proposed method, a full-scale high-speed railway embankment (HSRE) with four instrumented subsections over medium compressibility silty clay was constructed in three stages. The soil profile, construction procedure and monitoring of settlements and lateral displacements of the four test sections were described. The field deformation analysis results show that 1) the combined reinforcement of CFG piles and geosynthetic layer perform well in terms of reducing lateral displacements; 2) the development of lateral displacements lags behind the increase of fill load, which can be attributed to the vertical load transfer mechanism of the pile foundation; and 3) pile length has a dominant effect on the stress distribution proportion between piles and surrounding soils. The comparison between predicted and experimental results suggests that the proposed analytical solution and the back analysis-based method are capable of reasonably estimating the lateral deformation and the stress concentration ratio, respectively, if the appropriate soil elastic modulus is chosen.

KeywordPiled-supported Embankment Silty Clay Lateral Displacement Field Test
DOI10.1007/s11771-015-2665-9
Indexed BySCI
Language英语
Quartile4区
TOP
WOS IDWOS:000352821500036
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18496
Collection山地灾害与地表过程重点实验室
Affiliation1.Key Laboratory of High-speed Railway Engineering of Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.Faculty of Engineering and Built Environment, The University of Newcastle, Newcastle, NSW 2308, Australia
3.China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, China
Recommended Citation
GB/T 7714
Zhang CL,JIANG Guan-lu,LIU Xian-feng,et al. Lateral displacement of silty clay under cement-fly ash-gravel pile-supported embankments: Analytical consideration and field evidence[J]. Journal of Central South University of Technology,2015,22(4):1477-1489.
APA Zhang CL,JIANG Guan-lu,LIU Xian-feng,&WANG Zhi-meng.(2015).Lateral displacement of silty clay under cement-fly ash-gravel pile-supported embankments: Analytical consideration and field evidence.Journal of Central South University of Technology,22(4),1477-1489.
MLA Zhang CL,et al."Lateral displacement of silty clay under cement-fly ash-gravel pile-supported embankments: Analytical consideration and field evidence".Journal of Central South University of Technology 22.4(2015):1477-1489.
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