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Effect of dry density on the liquefaction behaviour of Quaternary silt
Zhang Chonglei1,2,4; Jiang Guanlu2; Su Lijun1,3,4; Liu Weiming1; Zhou Gongdan1,4
2018
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
EISSN1993-0321
Volume15Issue:7Pages:1597-1614
SubtypeArticle
Contribution Rank1
Abstract

Quaternary silt is widely distributed in China and easily liquefies during earthquakes. To identify the influence of the dry density on the liquefaction behaviour of Quaternary silt, 40 cyclic triaxial liquefaction tests were performed on loose silt (dry density rho (d) =1.460 g/cm(3)) and dense silt (rho (d) =1.586 g/cm(3)) under different cyclic stress ratios (CSRs) to obtain liquefaction assessment criteria, determine the liquefaction resistance, improve the excess pore water pressure (EPWP) growth model and clarify the relationship between the shear modulus and damping ratio. The results indicate that the initial liquefaction assessment criteria for the loose and dense silts are a double-amplitude axial strain of 5% and an EPWP ratio of 1. The increase in the anti-liquefaction ability for the dense silt is more significant under lower confining pressures. The CSR of loose silt falls well within the results of the sandy silt and Fraser River silt, and the dense silt exhibits a higher liquefaction resistance than the sand-silt mixture. The relationships between the CSR and loading cycles were obtained at a failure strain of 1%. The EPWP development in the dense and loose silts complies with the "fast-stable" and "fast-gentle-sharp" growth modes, respectively. The power function model can effectively describe the EPWP growth characteristics of the dense silt. Finally, based on the liquefaction behaviour of silt, a suggestion for reinforcing silt slopes or foundations is proposed.

KeywordLiquefaction  quaternary silt  dry density  earthquake Magnitude  liquefaction assessment  cyclic Stress Ratio
DOI10.1007/s11629-018-4930-5
Indexed BySCI
Language英语
Quartile4区
TOP
WOS IDWOS:000438468900017
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23473
Collection山地灾害与地表过程重点实验室
Corresponding AuthorSu Lijun
Affiliation1.Key Laboratory of Mountain Hazards and Earth Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2.Ministry of Education, Key Laboratory of High-speed Railway Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
3.CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;
4.University of Chinese Academy of Sciences, Beijing 100049, China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding 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,Su Lijun,et al. Effect of dry density on the liquefaction behaviour of Quaternary silt[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(7):1597-1614.
APA Zhang Chonglei,Jiang Guanlu,Su Lijun,Liu Weiming,&Zhou Gongdan.(2018).Effect of dry density on the liquefaction behaviour of Quaternary silt.JOURNAL OF MOUNTAIN SCIENCE,15(7),1597-1614.
MLA Zhang Chonglei,et al."Effect of dry density on the liquefaction behaviour of Quaternary silt".JOURNAL OF MOUNTAIN SCIENCE 15.7(2018):1597-1614.
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