| 黄河水下三角洲沉积物在循环荷载作用下土体中孔压变化实验研究 |
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| 引用本文： | 许国辉,单红仙,贾永刚.黄河水下三角洲沉积物在循环荷载作用下土体中孔压变化实验研究[J].中国海洋大学学报(自然科学版),2003,33(1):80-86. |
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| 作者姓名： | 许国辉 单红仙 贾永刚 |
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| 作者单位： | 中国海洋大学环境科学与工程学院,青岛,266003 |
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| 基金项目： | 山东省自然科学基金项目 ( Q99E10 )，国土资源部地质灾害与工程地质环境保护专业实验室基金项目 ( WB90 0 90 2 4 7DK )资助 |
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| 摘 要： | 利用室内周期循环加载试验 ,对黄河水下三角洲土体中孔隙水压力的变化加以测定 ,通过对波浪水槽试验和动三轴试验 2种方案所获数据分析认为黄河水下三角洲土体 (粉土、粘质粉土、粉质粘土 )存在一破坏的循环极限荷载。在小于此极限循环荷载作用情况下 ,土体中孔隙水压力总体呈现下降趋势 ,没有积累升高的过程 ,不同于砂土在循环荷载作用下孔隙水压力升高导致液化的情况。这一现象对判别黄河水下三角洲土体破坏机制的研究有重要意义。
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| 关 键 词： | 黄河水下三角洲 孔隙水压力 水槽试验 动三轴试验 |
| 文章编号： | 1001-1862(2003)01-080-07 |
| 修稿时间： | 2001年12月15 |
Experimental Research on the Variation of Pore-Pressure Under Cyclic Loading in the Subaqueous Yellow River Delta |
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| Xu Guohui,Shan Hongxian,Jia Yonggang.Experimental Research on the Variation of Pore-Pressure Under Cyclic Loading in the Subaqueous Yellow River Delta[J].Periodical of Ocean University of China,2003,33(1):80-86. |
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| Authors: | Xu Guohui Shan Hongxian Jia Yonggang |
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| Abstract: | The variation of pore water pressure changing under limit conditions is tested in the laboratory and the data obtained from the flume experiment and dynamic triaxial test are analysed. The results show that a limit cyclic loading exists, which results in soil failure in the subaqueous Yellow River Delta. Under this limit, the pore water pressure generally appears to decrease with increasing loading, without a process in which the pressure increases, which is unlike sandy soil, in which pore water pressure inereases under ciclic loading, leading to liquefaction. This phenomenon is of significance in studying the mechanism of soil failure in the subaqueous Yellow River Delta. |
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| Keywords: | subaqueous Yellow River Delta pore water pressure flume test dynamic triaxial test |
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