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WU Qi, CHEN Guo-xing, ZHOU Zheng-long, LING Dao-sheng. Experimental investigation on liquefaction resistance of fine-coarse-grained soil mixtures based on theory of intergrain contact state[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(3): 475-485. DOI: 10.11779/CJGE201803011
Citation: WU Qi, CHEN Guo-xing, ZHOU Zheng-long, LING Dao-sheng. Experimental investigation on liquefaction resistance of fine-coarse-grained soil mixtures based on theory of intergrain contact state[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(3): 475-485. DOI: 10.11779/CJGE201803011

Experimental investigation on liquefaction resistance of fine-coarse-grained soil mixtures based on theory of intergrain contact state

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  • Received Date: December 08, 2016
  • Published Date: March 24, 2018
  • In order to investigate the liquefaction resistance CRR of fine-coarse-grained soil mixtures, a series of undrained cyclic triaxial tests are performed on the fine-coarse-grained soil mixtures with different values of fines content FC and relative density Dr. According to the theory of intergrain contact state, the mixtures are categorized as coarse-like soil, intermediate behavior soil and fines-like soil. The skeleton void ratio esk is used as the grain contact density index to describe the intergrain contact state which composes the skeleton of mixtures, and the parameters b and m are used to characterize the contribution of the fines and the coarse grains to the transition between coarse-like and fines-like behaviors in mixtures. The test results show that as FC increases, the CRR of mixtures with the same Dr decreases first, and thereafter it remaines constant. In addition, the CRR of mixtures with different values of FC and Dr decreases with the increase of esk. Moreover, the test data obtained in this study reveal that esk can be used as the index to uniquely evaluate the CRR of mixtures, and a power relationship between a decrease in CRR and an increase in esk is then obtained.
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