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Deformation performance of cement-fly ash-gravel pile-supported embankments over silty clay of medium compressibility: a case study
Zhang CL(张崇磊)1,2; Guanlu Jiang1; Xianfeng Liu2; Zhimeng Wang3
Corresponding AuthorJiang Guanlu
2015-07
Source PublicationArabian Journal of Geosciences
ISSN1866-7511
Volume8Issue:7Pages:4495–4507
Abstract

This paper presents a special case study on the performance of geosynthetics-reinforced and pile-supported embankments (GRPS) over silty clay of medium compressibility. A full-scale high-speed railway embankment with four instrumented subsections over medium silty clay was constructed in three stages. Three of the sections were reinforced by geosynthetics and cement-fly ash-gravel (CFG) piles with different configurations, while the other section was only reinforced by geosynthetics, which was used as a reference. The discussion mainly focused on the deformation behaviors of test embankments. The results show that (1) both the vertical settlements and the lateral displacements slightly increased until a certain fill height. Afterwards, they increased rapidly due to the transformation from the over-consolidated state to partly or entirely normally consolidated state of the foundation soil. (2) CFG pile reinforcement performed well in terms of reducing settlements and lateral displacements. (3) The lateral displacement is a useful indicator for evaluating external stability of GRPS embankments. Moreover, the comparison of soil stiffness obtained from in situ and laboratory suggests that an appropriate equivalent modulus may be obtained based on the stiffness-strain curve from a triaxial test with local strain measurements while considering the correct strain level obtained from field measurements of vertical settlements.

KeywordSilty Clay Field Testing Lateral Displacement
DOI10.1007/s12517-014-1559-8
Indexed BySCI
Language英语
Quartile4区
TOP
WOS IDWOS:000357101200017
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18134
Collection山地灾害与地表过程重点实验室
Affiliation1.Southwest Jiaotong Univ, Sch Civil Engn, Minist Educ, Key Lab High Speed Railway Engn, Chengdu 610031, Peoples R China
2.Univ Newcastle, Prior Res Ctr Geotech & Mat Modelling, Callaghan, NSW 2308, Australia
3.] China Railway Eryuan Engn Grp Co Ltd, Chengdu 610031, Peoples R China
Recommended Citation
GB/T 7714
Zhang CL,Guanlu Jiang,Xianfeng Liu,et al. Deformation performance of cement-fly ash-gravel pile-supported embankments over silty clay of medium compressibility: a case study[J]. Arabian Journal of Geosciences,2015,8(7):4495–4507.
APA Zhang CL,Guanlu Jiang,Xianfeng Liu,&Zhimeng Wang.(2015).Deformation performance of cement-fly ash-gravel pile-supported embankments over silty clay of medium compressibility: a case study.Arabian Journal of Geosciences,8(7),4495–4507.
MLA Zhang CL,et al."Deformation performance of cement-fly ash-gravel pile-supported embankments over silty clay of medium compressibility: a case study".Arabian Journal of Geosciences 8.7(2015):4495–4507.
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