水土保持通报2023，Vol.43Issue(6)：18-24,7.DOI:10.13961/j.cnki.stbctb.2023.06.003
珊瑚沙质岸线防浪固沙障水槽模拟试验研究
Flume-based Experimental Study on Wave Prevention and Sand Fixation Functions of Sand Barriers Applied to Coral Sandy Coastlines
摘要
Abstract
[Objective]The flume simulation research on wave prevention and sand stabilization counter measures for coral sandy coastlines were studied in order to provide a theoretical basis for the project to protect coastlines against wave erosion along the Dengloujiao shoreline,located in the Xuwen National Coral Reef Nature Reserve on the Leizhou Peninsula,and to provide technical support for similar coastal areas.[Methods]The coastal erosion protection effect of san-dbag barrier measures was determined for the Dengloujiao coastline using a flume experiment simulation method.[Results]① The composite effect of the overall structure of the diamond-shaped sand-bag barrier had a significant impact on the stability of the sand barrier.Two groups of sand barriers with a diameter of 5 cm or above was able to achieve self-stability.Calculated according to the gravity similarity criterion,this was equivalent to 50 cm diameter of the prototype;② The sand-bag barrier achieved sediment fixation by increasing the roughness of the bed surface,weakening the hydrodynamic strength,and thereby reducing the intensity of sediment transport.As the diameter of the sand barrier increased,its shielding effect became more significant;③ For a wave period of 1.90 s and a water depth of 0.4 m,the height of sand ridges observed in the experiment were 3-4 cm.Therefore,in practical projects,sand barriers with a diameter of 50 cm or more can prevent and control the migration of sand waves and sand ridges;④ The sand barrier arranged in a diamond shape was less affected by oblique waves and had better stability than the sand barrier arranged in a normal direction.Therefore,it is advisable to use a diamond-shaped sand barrier to reduce the effect of oblique waves.[Conclusion]The use of sand-bag barriers as protective materials for coastal erosion not only achieved the goal of sand control,but also produced favourable ecological and environmental protection effects.These results could provide important scientific guidance and have significant and practical promotion value.关键词
珊瑚沙质岸线/海岸侵蚀/沙袋沙障/模拟试验Key words
coral sandy coastline/coastal erosion/sand-bag barrier/simulation experiment分类
天文与地球科学引用本文复制引用
屈建军,李绍武,蒋冲,胡文励,柳叶,李启航..珊瑚沙质岸线防浪固沙障水槽模拟试验研究[J].水土保持通报,2023,43(6):18-24,7.基金项目
南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项"南海和大湾区资源环境可持续利用及治理研究"(GML2019ZD0601) （广州）
