国内外规范关于水流作用下护底块石稳定质量计算方法对比

Comparison of calculation methods for stable mass of bottom protection stone under current attack in Chinese and foreign codes

关于水流作用下护底块石的稳定质量计算,国内外均开展了大量研究,并总结提出多种计算理论,各国规范也给出不同的计算方法。因研究条件和背景有所不同,采用各种计算方法往往得到不同的计算结果,给设计人员带来较多不便。针对上述问题,梳理国内外常用规范中给出的计算方法,并结合工程案例进行对比分析,总结不同方法之间的差异以及适用条件。结果表明,水深是影响护底块石质量的敏感因素,计算方法选取时应重点考虑该因素;美国规范考虑的影响因素较为全面,具有较好的适用性;但在强紊动的水流条件下,建议对照国际通用手册中的Pilarczyk法和Escarameia&May法综合评估确定块石质量。

Regarding to the calculation for stable mass of bottom protection stone under current attack,a large amount of research has been carried out in the domestic and overseas,and a variety of calculation theories have been summarized and put forward,with different calculation methods given in different national codes.Due to different research conditions and backgrounds,different calculation results are often obtained by different calculation methods,which bring more inconvenience to engineers.In view of the above problems,we sort out the calculation methods given in Chinese and common international codes,make comparative analysis based on a project,and summarize the differences and applicable conditions in different methods.The results show that water depth is a sensitive factor affecting the mass of bottom protection stone,which should be significantly considered in the selection of calculation method.American code has better applicability due to more comprehensive in consideration of influencing factors,however,in the strong turbulent water flow condition,the Pilarczyk method and Escaramei & May method of the international general manual are recommended for comparison and comprehensive evaluation to determine the mass of bottom protection stone.