| 混凝土联锁排应用于海底电缆防护稳定性研究 |
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| 引用本文： | 王晓建,黄潘阳,徐建平,来向华,李捍平,胡列翔.混凝土联锁排应用于海底电缆防护稳定性研究[J].海洋学研究,2019,37(3):73-78. |
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| 作者姓名： | 王晓建 黄潘阳 徐建平 来向华 李捍平 胡列翔 |
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| 作者单位： | 国网浙江省电力有限公司,浙江杭州310007;自然资源部第二海洋研究所,浙江杭州310012;国网浙江省电力公司舟山供电公司,浙江舟山316000 |
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| 基金项目： | 国家电网公司500 kV海缆工程项目资助(52110417000N);国家电网公司科技项目资助(5211DS17002F);国家海洋局第二海洋研究所科研业务费专项项目资助(JG1307) |
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| 摘 要： | 海底电缆穿越底质坚硬海床时,覆盖混凝土联锁排可以有效保护海缆。根据国网舟山500 kV海底输电电缆所在海域实测水文数据,采用力学平衡公式和数值模拟两种计算方法,研究混凝土块在极端水流作用下的在位稳定性。基于推导出的力学平衡公式,对其进行函数分析后发现,当混凝土块底边固定时,存在一个极值高度,此时铺设在海床的混凝土块最为稳定,可以抵挡的水流流速最大。通过数值模拟,研究了混凝土联锁排在水流作用下的三维流态特征,对不同形状混凝土块的受力情况进行比较后发现,当混凝土块边缘为圆角时,可以改变边缘周边的水流结构,总体上加强混凝土块的稳定性。经计算,尽管国网舟山500 kV海底输电电缆所在的灰鳖洋海域潮流流速较大,但常规长、宽、高为0.4 m×0.4 m×0.3 m的块体组成的混凝土联锁排可以抵抗水流的冲击,保护海底电缆。
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| 关 键 词： | 混凝土联锁排 海底高压电缆 防护 稳定性 |
| 收稿时间： | 2018-12-21 |
Physical and numerical model study on stability of concrete interlocking mattress for submarine cable protection |
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| WANG Xiao-jian,HUANG Pan-yang,XU Jian-ping,LAI Xiang-hua,LI Han-ping,HU Lie-xiang.Physical and numerical model study on stability of concrete interlocking mattress for submarine cable protection[J].Journal of Marine Sciences,2019,37(3):73-78. |
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| Authors: | WANG Xiao-jian HUANG Pan-yang XU Jian-ping LAI Xiang-hua LI Han-ping HU Lie-xiang |
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| Affiliation: | 1. State Grid Zhejiang Electric Power Company, LTD, Hangzhou 310007, China; 2. Second Institute of Oceanography, MNR, Hangzhou 310012, China; 3. State Grid Zhejiang Electric Power Company Zhoushan Branch, Zhoushan 316000, China |
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| Abstract: | When the submarine cable passes through the hard bottom seabed, covering the concrete interlocking mattress can effectively protect it. According to the measured hydrological data in the sea area of the state grid corporation of 500 kV submarine cable project, two methods were used to study the stability of the concrete interlocking mattress under the extreme flow. Based on function analysis of the mechanical balance, it is found that when the bottom length of the concrete block is fixed, there is an extreme height. At this time the concrete block laid on seabed is the most stable, and also the flow velocity that can be resisted is the largest. Through numerical simulation, the three-dimensional flow characteristics of concrete interlocking mattress in current were studied. After comparing the force situation of different shape concrete blocks, it is found that when the edge of the concrete block is rounded, the flow structure around the edge can be changed, and the stability of the concrete block can be strengthened in general. Although the current velocity in the sea area of the state grid corporation of 500 kV submarine cable project is large, the conventional size of 0.4 m×0.4 m×0.3 m blocks can resist the impact of the current and protect the submarine cable. |
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| Keywords: | concrete interlocking mattress submarine high voltage cable protection stability |
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