Cyclic Behavior of Calcareous Sand from the South China Sea
Cyclic Behavior of Calcareous Sand from the South China Sea
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DOI：
10.3390/jmse9091014
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发表时间：
2021-09
影响因子：
2.9
通讯作者：
Lu Liu;Xiaofei Yao;Zhan-Hua Ji;Hongmei Gao;Zhihua Wang;Zhifu Shen
中科院分区：
文献类型：
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作者：
Lu Liu;Xiaofei Yao;Zhan-Hua Ji;Hongmei Gao;Zhihua Wang;Zhifu Shen
本研究探讨了来自中国南海的钙质砂的循环行为。对不同相对密度、循环应力比和有效围压的钙质砂进行了一系列不排水循环三轴试验。试验结果表明，有效围压对钙质砂的循环特性影响较小，而CSR和相对密度的变化对钙质砂的循环特性影响显著。由于钙质砂的棱角性，其抗液化强度远高于硅砂。此外，钙质砂和硅砂之间的孔隙压力产生特性和变形响应方面的差异也被观察到。
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.