| 泥沙颗粒间黏结力作用及其对泥沙起动影响研究进展 |
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| 引用本文： | 龚政,葛冉,冯骞,魏佳欣,苏敏,靳闯,罗景阳.泥沙颗粒间黏结力作用及其对泥沙起动影响研究进展[J].水科学进展,2021,32(5):801-812. |
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| 作者姓名： | 龚政 葛冉 冯骞 魏佳欣 苏敏 靳闯 罗景阳 |
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| 作者单位： | 1.河海大学水文水资源与水利工程科学国家重点实验室, 江苏 南京 210098 |
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| 基金项目： | 国家自然科学基金资助项目51925905国家自然科学基金资助项目51879095 |
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| 摘 要： | 黏性沙起动是泥沙起动研究的难点，黏结力作用是影响黏性沙起动的关键。从形成机理出发，归纳出泥沙起动中主要涉及2大类、共6种黏结力作用，探寻了其中典型的双电层力及EPS（Extracellular Polymeric Substances）黏结力的形成机理及影响因素，从泥沙稳定性及起动模式两方面剖析了黏结力作用对泥沙起动的影响，比较分析了黏结力作用的量化研究。现有研究往往对某种黏结力进行研究，较少考虑多种黏结力之间的相互作用和综合效应，系统性不足；已有的成果多是基于实测资料得到的经验关系，缺乏从机理层面得出定量关系，理论性不强。未来应根据泥沙所处环境，综合考虑泥沙颗粒间存在的多种黏结力作用，从黏结力作用形成机理出发，深入研究黏结力作用的量化表达。
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| 关 键 词： | 泥沙起动 黏性沙 黏结力作用 双电层力 EPS黏结力 |
| 收稿时间： | 2020-12-14 |
Cohesive forces between sediment particles and its impact on incipient motion of sediment: a review |
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| Affiliation: | 1.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China2.Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing 210098, China3.College of Environment, Hohai University, Nanjing 210098, China |
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| Abstract: | The understanding of the incipient motion of cohesive sediment is a great challenge in the research of sediment incipient motion. It is recognized that cohesive forces are critical in determining the characteristics of cohesive sediment incipient motion. Based on the analysis of current research, cohesive forces are summarized in two main categories (containing six types) according to the formation mechanism, and the formation mechanism and influencing factors of the typical electric double layer force and EPS cohesive force are explored. The impact of cohesive forces on cohesive sediment incipient motion is examined in terms of two aspects, i.e. sediment stability and incipient motion modes. Based on the discussion above, it is concluded that current studies generally focus on one certain cohesive force and seldom take the interaction and comprehensive effect between cohesive forces into consideration, lacking systematicness. Moreover, most of the current research achievements based on measured data are empirical and short of quantitative relationship derived from mechanism level, suffering from a theoretical deficiency. It is suggested that the various cohesive forces should be considered comprehensively in line with the specific sedimentary environment. What's more, the formation mechanism research of cohesive forces should be concerned fundamentally, and the quantification research of cohesive forces needs more attention. |
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