海岸防护中护底块石稳定重量的确定

在分析规范中护底抛石稳定重量与堤前最大波浪底流速关系的基础上,从波浪理论出发,探讨了不同波浪理论所确定的堤前最大波浪底流速的异同点,同时借助于稳定重量的波浪水槽试验结果来判断其合理性。研究结果表明,护底抛石的稳定重量与堤前最大波浪底流速的3次方成正比,在确定流速的三种方法中,微幅波及斯托克斯二阶波所得到的堤前最大波浪底流速基本相同,且明显小于椭圆余弦波的结果。结合试验可知,椭圆余弦波理论用于指导抛石护底稳定重量的设计较为合理,而微幅波理论及斯托克斯二阶波理论的结果偏小,不利于工程安全。

Determination of Stable Weight of Bottom Blocks in Coastal Protection Works

On the basis of analysis for the relationship between the stable weight of bottom blocks and maximum bottom velocity in front of dike,starting from wave theory,the same and different points of maximum wave bottom velocity in front of dike determined by different wave theory were investigated,their reasonableness was judged by use of test results of wave flume for stable weight.The results show the stable weight of bottom blocks is proportional to the three power of maximum wave bottom velocity.In three methods to determine velocity,the maximum wave bottom velocity in front of dike obtained by micro-amplitude wave and Stocks second order wave is same and smaller than the results of elliptic cosine wave.According to the experiments,it can be known that the elliptic cosine wave theory is suitable to the design of stable weight of bottom blocks,but the results of micro-amplitude wave theory and Stocks second order wave theory is smaller and is not good for safety of works.