Journal
JOURNAL OF MARINE SCIENCE AND ENGINEERING
Volume 9, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/jmse9091014
Keywords
calcareous sand; cyclic triaxial test; liquefaction; cyclic strength
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Funding
- National Natural Science Foundation of China [52008207, 51908284, 51678300]
- Natural Science Research Project of Colleges and Universities in Jiangsu Province of China [18KJA560002, 19KJB560015]
- Middle-Aged and Young Science Leaders of Qinglan Project of Universities in Jiangsu Province of China
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Calcareous sand from the South China Sea shows higher liquefaction resistance compared to silica sand, with notable effects from changes in cyclic stress ratio and relative density. Differences in pore pressure generation characteristics and deformation responses between calcareous and silica sands were also observed.
This study examines the cyclic behavior of calcareous sand obtained from the South China Sea. A series of undrained cyclic triaxial tests were performed on the calcareous sand with various relative densities, cyclic stress ratios, and effective confining pressures. The test results show that whereas the effective confining pressure exhibited a small influence on the cyclic behavior of the calcareous sand, the effect of changes in CSR and relative density was notable. Due to its angular nature, the liquefaction resistance of calcareous sand was much higher than that of silica sand. In addition, differences between calcareous and silica sands in terms of pore pressure generation characteristics and deformation responses were also observed.
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