淹没海滩护底混凝土联锁排稳定厚度公式研究

Research on stable thickness formulas of concrete bottom mattress in submerged beach

在介绍荷兰公式、水利部规范公式及半理论半经验公式的基础上,研究各公式的工作状态和失稳机理,同时对半理论半经验公式进行了合理简化。研究结果表明,三个公式的工作状态并不相同,对于常年淹没且处于破波水深范围内的海滩护底一类工程,半理论半经验公式较为合适;对于非淹没的斜坡护坡,荷兰或水利部公式较为适用。研究同时表明,当模数k位于0.88至1.00范围时,半理论半经验公式中理论系数β可以取最大值0.298,由此得到波浪作用下海滩护底工程混凝土联锁排稳定厚度的简化计算公式,与原公式相比,计算结果相近而且偏于安全。

On the basis of three correlative formulas in the code and papers,the unstable mechanism is analyzed.At last,the theoretical coefficient of the paper＇s formula is predigested.The results show that the unstable mechanism of three formulas is not the same.The paper＇s formula is fit to determine the thickness of the concrete mattress under wave in the bottom protection engineering.The Netherlandish formula and the formula in the code are fit to confirm the thickness in the revetment.The results also show that the max of theoretical coefficient is 0.298 when the modulus changes from 0.88 to 1.00.According to the result,the predigested formula under wave action can be gained.Bycomparing the predigested with the original,it can be seen that the results of the predigested are much safer.