摘要
沙质海岸在自然状态和修建新工程后存在侵蚀风险时,主要采用近岸补沙和建设生态离岸潜堤的方式进行海滩修复。采用1∶100的正态波浪-潮流-泥沙物理模型模拟的方法对三亚新机场建设后天涯海角附近人工补沙方案的防护效果开展研究,分别针对常海况和台风浪作用工况进行了模拟试验。结果表明:人工补沙的维护周期大致每4.5 a一次,个别部位为每9 a一次;受人工补沙的掩护作用,大风浪作用25 h后沙滩断面基本能维持在原高程,需定期对补沙断面进行监测。研究表明,采用人工补沙既不改变岸滩的自然属性,又能有效减小受侵蚀岸段的冲刷和淤积岸段的淤积,且无明显次生影响,可显著缓解人工岛建设引起的岸滩冲淤影响。
When a sandy coast is at risk of erosion in a natural state and after the construction of new project,the restoration of beach is carried out mainly by means of nearshore compensation of sand and construction of ecological offshore submerged breakwater.The protective effect of artificial sand replenishment near Tianya Haijiao after the construction of Sanya new airport is studied by means of a normal wave-tide-sediment physical model with a scale of 1:100 and simulated respectively under the conditions of normal sea state and typhoon wave.The results show that the maintenance period of the artificial sand replenishment is roughly about once every 4.5 years,with once every 9 years at individual sites of the beach.Due the coverture by the artificial sand compensation,the section of the beach can be basicaly kept at the original elevation after 25 hour action of storm.Therefore,it is necessary to monitor regularly the section of sand-filling.The study indicates that by the artificial sand compensation,the natural properties of the beach can not be changed,both the scouring of the eroded coast segments and the silting of the deposited coast segments can be reduced effectively,no obvious secondary affection can be caused and the erosion and deposition of the beach caused by the construction of artificial islands can be alleviated obviously.
作者
刘针
程永舟
戈龙仔
夏波
LIU Zhen;CHENG Yong-zhou;GE Long-zai;XIA Bo(School of Water Conservancy Engineering, Changsha University of Science & Technology, Changsha 4101141, China;Tianjin Institute of Water Transport Engineering, Ministry of Transport, Tianjin 300456, China;National Engineering Laboratory of Port Hydraulic Construction Technology, Tianjin 300456, China)
出处
《海岸工程》
2021年第2期121-130,共10页
Coastal Engineering
基金
交通运输部天津水运工程科学研究所科研创新基金项目——海上风电护底失效机理及新型防冲刷措施研究(TKS190201)。
关键词
沙质海岸
海岸侵蚀
正态物理模型
人工补沙方案
sandy coast
coastal erosion
normal physical model
artificial sand compensation plan
作者简介
刘针(1979—),女,副研究员,硕士,主要从事波浪与结构物相互作用方面研究.E-mail:wave_2006@126.com;通信作者:戈龙仔(1977—),男,副研究员,硕士,主要从事港口航道方面研究.E-mail:gelongzai@163.com。
