钙质的
岩土工程
液化
剪切(地质)
剪切模量
可塑性
地质学
拉伤
材料科学
复合材料
医学
古生物学
内科学
作者
Jian Hu,Yang Xiao,Jinquan Shi,Armin W. Stuedlein,T. Matthew Evans
出处
期刊:Geotechnique
[Thomas Telford Ltd.]
日期:2024-05-09
卷期号:: 1-15
标识
DOI:10.1680/jgeot.23.00199
摘要
Incorporation of non-plastic fines can dramatically affect the liquefaction resistance and stiffness of sands. In this study, the aim is to evaluate the influence of non-plastic fines on the liquefaction resistance and small-strain shear modulus of calcareous sand under cyclic loading. Forty-seven sets of undrained cyclic triaxial tests and companion bender element tests are conducted on reconstituted specimens. The cyclic behaviour of clean sand and silty sand with varying fines content is examined with respect to the global void ratio, relative density and granular skeleton void ratio. The findings demonstrate that the microscopic contacts between coarse and fine grains have a significant impact on the macroscopic behaviour of sand–fines mixtures. The experimental findings are evaluated using the equivalent granular skeleton void ratio, which has been recognised as a suitable parameter to describe the overall effect of fines. The findings on calcareous sand with fines are supplemented and compared with published data in accordance with the semiempirical simplified approach for liquefaction triggering based on shear wave velocity.
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