Scour Characteristics of Artificial Reef through Experiment and Numerical Analysis

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2019-01-01 DOI:10.12814/JKGSS.2019.18.3.023
Daeho Yun, Yuntae Kim
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Abstract

This study investigated the scour characteristics of artificial reef according to unreinforced and reinforced artificial reefs through laboratory test and numerical analysis. In this study, geogrid was used as a reinforcement of seabed. Three different reinforced areas were selected; one time, three times and five times bottom area of artificial reef. Two-dimensional water channel test was carried out to investigate scour patten of sand and silt grounds. Numerical analysis was also performed to see the velocity vector and scouring patten around artificial reef which was same condition with experiment. The numerical results were in good agreements with the experimental test results. It was found that the geogrid-installed soft ground under artificial reef tends to reduce scour, compared to unreinforced soft ground.
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人工鱼礁冲刷特性试验与数值分析
通过室内试验和数值分析,对未加筋和加筋人工鱼礁的冲刷特性进行了研究。在本研究中,土工格栅被用作海底的加固。选择了三个不同的加固区域;人工礁底面积的1倍、3倍、5倍。采用二维水道试验研究了砂土和粉土地基的冲刷规律。对人工鱼礁周围的速度矢量和冲刷模式进行了数值分析,结果与实验结果一致。数值计算结果与试验结果吻合较好。研究发现,人工礁下加装土工格栅的软土地基与未加装土工格栅的软土地基相比,有减小冲刷的趋势。
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