| 黄河入海泥沙沉积固结过程抗侵蚀性变化研究 |
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| 引用本文： | 孟祥梅,贾永刚,宋敬泰,侯伟,刘涛,单红仙.黄河入海泥沙沉积固结过程抗侵蚀性变化研究[J].岩土力学,2010,31(12):3809-3815. |
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| 作者姓名： | 孟祥梅 贾永刚 宋敬泰 侯伟 刘涛 单红仙 |
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| 作者单位： | 1. 中国海洋大学,海洋环境与生态教育部重点实验室,山东,青岛,266100
2. 中国海洋大学,环境科学与工程学院,山东,青岛,266100 |
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| 基金项目： | 国家自然科学基金项目（No.40876042）；国家863项目（No.2008AA09Z109）。 |
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| 摘 要： | 河口入海泥沙沉积固结过程中抗侵蚀性的变化直接决定着沉积物的再悬浮和二次迁移,对河口岸滩的稳定具有重要决定作用。在现代黄河三角洲潮滩模拟入海泥沙快速沉积,现场测试不同固结时间沉积物的抗侵蚀性和物理力学指标的变化。研究发现,黄河入海泥沙沉积物的抗侵蚀性随固结时间增长迅速提高,当沉积固结时间达8h时,其临界侵蚀切应力就超过了原状潮滩表层沉积物;新沉积泥沙的临界侵蚀切应力与其重度、贯入阻力、剪切强度呈良好的正相关关系,与含水率呈良好的负相关关系。黄河入海泥沙临界侵蚀流速的试验值随固结时间的增长速率要高于各泥沙起动公式计算值的增长速率,前者是后者的1.5～4.1倍。
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| 关 键 词： | 黄河口 入海泥沙 固结过程 临界侵蚀切应力 现场观测 |
| 收稿时间： | 2009-11-19 |
Study of erodibility change of Yellow River sediment into sea in process of consolidation |
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| MENG Xiang-mei,JIA Yong-gang,SONG Jing-tai,HOU Wei,LIU Tao,SHAN Hong-xian.Study of erodibility change of Yellow River sediment into sea in process of consolidation[J].Rock and Soil Mechanics,2010,31(12):3809-3815. |
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| Authors: | MENG Xiang-mei JIA Yong-gang SONG Jing-tai HOU Wei LIU Tao SHAN Hong-xian |
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| Institution: | 1. Key Laboratory of Marine Environmental Science and Ecology of Ministry of Education, Ocean University of China, Qingdao, Shandong 266100, China; 2. College of Environmental Science and Engineering, Ocean University of China, Qingdao, Shandong 266100, China |
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| Abstract: | The erodibility change of estuarine sediment in the process of consolidation directly determines the resuspension and secondary migration of sediment, which plays an important decisive role in estuarine and coastal stability. The rapid deposition of Yellow River sediment into the sea was simulated on the tidal flat of the modern Yellow River delta, and the erodibility and physico-mechanical properties of the sediment at different consolidation times were measured in situ. The results show that the anti-erodibility of the Yellow River sediment into the sea rapidly increases with consolidation time; and the critical erosion shear stress has already exceeded the value of the undisturbed tidal flat surficial sediment when the consolidation time extends as long as 8 hours. The critical erosion shear stress of the newly deposited sediment has a good positive correlation with bulk density, penetration resistance and shear strength, a good negative correlation with water content. The rise rate of measured critical erosion velocity of the Yellow River sediment into the sea with consolidation time is higher than the rise rate of calculated value using different formulas; and the former is 1.5-4.1 times as high as the latter. |
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| Keywords: | Yellow River estuary sediment into the sea consolidation process critical erosion shear stress field experiments |
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