| 波致海床液化引发底边界高浓度悬浮体形成过程的试验研究 |
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| 引用本文： | 崔 凯,贾永刚,刘晓磊,文明征,单红仙.波致海床液化引发底边界高浓度悬浮体形成过程的试验研究[J].科学技术与工程,2018,18(21). |
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| 作者姓名： | 崔 凯 贾永刚 刘晓磊 文明征 单红仙 |
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| 作者单位： | 山东省海洋环境地质工程重点实验室中国海洋大学;青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室;海洋环境与生态教育部重点实验室中国海洋大学 |
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| 基金项目： | 波致海床液化诱发黄河口异重流研究、风暴事件作用下黄河口海底界面层动态演化及控制因素研究 |
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| 摘 要： | 国内外众多现场原位观测的实测资料,其结果表明粉质土海床在波浪作用下,水体底边界会产生高浓度悬浮体。利用在黄河三角洲采集的粉质土制作试验土床开展室内水槽试验,旨在揭示波浪荷载持续作用下海床液化引发底边界产生高浓度悬浮体的过程及机制。根据试验现象及海床土体的孔隙水压力变化、水体悬浮泥沙浓度的时空分布,以及悬浮泥沙的粒度变化等特征,分析认为波浪导致的海床液化能够引发底边界高浓度悬浮体的形成。大量的土体细颗粒从液化土体的振荡边界与渗流通道中的析出,是导致高浓度悬浮体形成的重要原因。对进一步探讨黄河口区异重流现象的产生等科学问题具有一定的指导意义。
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| 关 键 词： | 波浪作用 海床液化 高浓度悬浮体 异重流 |
| 收稿时间： | 2018/2/8 0:00:00 |
| 修稿时间： | 2018/4/2 0:00:00 |
Laboratory Study on the Formation Process of High-Concentration Suspensions in the Bottom Boundary Due to Wave-induced Seabed Liquefaction |
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| Cui Kai,Jia Yong-gang,Wen Ming-zheng and Shan Hong-xian.Laboratory Study on the Formation Process of High-Concentration Suspensions in the Bottom Boundary Due to Wave-induced Seabed Liquefaction[J].Science Technology and Engineering,2018,18(21). |
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| Authors: | Cui Kai Jia Yong-gang Wen Ming-zheng and Shan Hong-xian |
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| Institution: | a. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China,a. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, China;b. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China;c. Key Laboratory of Marine Environment & Ecology, Ministry of Education, Qingdao 266100, China,,a. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China,a. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, China;b. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China;c. Key Laboratory of Marine Environment & Ecology, Ministry of Education, Qingdao 266100, China |
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| Abstract: | The results of many domestic and abroad in-situ observations show that high-concentration suspensions appear at the bottom boundary of silty seabed water under wave loading.In this paper, flume experiments were carried out to study the formation process and mechanism of high-concentration suspensions under wave loading at the bottom boundary of silty seabed, which is made using Huanghe River Delta silty soil.According to the experiment phenomena and the results of the pore water pressure change,the suspended sediment concentration spatio-temporal patterns,variation of the particle size,wave-induced seabed liquefaction can cause the formation of high concentration suspension at the bottom boundary.Numerous of fine grains from the oscillatory boundary and seepage channel of liquefiable soil entering into the water plays an important role in the formation process of high-concentration suspensions.This paper has theoretical significance in understanding of lots of scientific problems in the Yellow River Estuary,such as the hyperpycnal flow formation and mechanism and so on. |
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| Keywords: | wave action seabed liquefaction high-concentration suspensions sediment density current |
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