岬湾人工沙滩设计方法研究

发布时间：2018-05-03 16:21

本文选题：平衡岬湾曲线 + 抛物线模型　；参考：《大连理工大学》2016年硕士论文

【摘要】：目前,沿海地带成为人类生活的聚集区,同时也是经济最为发达的区域,但由于波浪、风暴潮、飓风等自然天气的影响和海平面不断上升的威胁,以及不合理的水工建筑物的影响,世界上的许多海岸正遭受着严重的侵蚀。如何合理有效的保护海滩是海岸工程研究亟需解决的问题。人工养滩在众多海滩养护方法中脱颖而出,它营造出一种自然的补沙环境,能够最少的改变海滩的原貌,很好地防止海岸遭到侵蚀,并且不会对上下游的海洋生态造成影响,此方法己在欧美等国家得到了广泛的应用。本文首先简要回顾了静态平衡岬湾理论的发展历程,从最初的对数螺线法到如今最为广泛使用的抛物线公式,然后成功运用神经网络法模拟出更利于实际操作的静态平衡岸线预测法。经验证,此方法比抛物线法在实际运用中操作更简单,在岬头处与岸线拟合效果更好,并总结出此方法的一般操作流程。对于人工养滩的剖面设计,本文则提出了更适合工程应用的施工剖面设计法,并在参考国内外规范的基础上提出了填沙“半衰期”同平均高潮位以上剩余滩肩宽度和平均低潮位以上填沙侵蚀量联合指标评价养滩效果的方法。结合辽宁鲅鱼圈月亮湾海滩浴场的整治修复实例,本文运用神经网络给出了平面规划方案,并与抛物线模型进行了对比；运用Xbeach数值模拟方法,根据本文提出的养滩测评指标,对剖面设计中的滩肩高程、填沙坡度和填沙粒径进行了优化,并给出一定的设计参考意见。
[Abstract]:At present, coastal zones have become an accumulation of human life and the most economically developed areas, but due to the effects of natural weather such as waves, storm surges and hurricanes, and the threat of rising sea levels, And the impact of unreasonable hydraulic structures, many of the world's shores are suffering serious erosion. How to protect beaches reasonably and effectively is an urgent problem to be solved in coastal engineering research. Artificial beach conservation stands out among many beach conservation methods. It creates a natural rehydration environment that minimizes changes in beach appearance, prevents coastal erosion, and does not affect marine ecosystems upstream and downstream. This method has been widely used in Europe and America. This paper first briefly reviews the development of static equilibrium Cape Bay theory, from the original logarithmic spiral method to the most widely used parabola formula. Then the neural network method is successfully used to simulate the static equilibrium shoreline prediction method which is more convenient for practical operation. It is proved that this method is easier to operate than parabola method in practice, and the fitting effect is better at the head of headland, and the general operation flow of this method is summarized. For the section design of artificial beach, this paper puts forward the construction section design method, which is more suitable for engineering application. On the basis of referring to the domestic and foreign norms, a method for evaluating the effect of beach conservation is put forward on the basis of "half life" of sand filling and the joint index of shoulder width of residual beach above average high tide level and sediment erosion amount above average low tide level. Combined with the example of restoration of Yueliangwan beach bathing site in Bayuquan, Liaoning Province, this paper gives a plan of plane planning by using neural network, and compares it with parabola model, and applies Xbeach numerical simulation method, according to the evaluation index of beach maintenance proposed in this paper. The beach shoulder height, sand filling slope and sand grain size are optimized in section design, and some design suggestions are given.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U652

【参考文献】