标准Ⅱ型马蹄形断面正常水深和临界水深的简化计算

摘要

马蹄形断面几何形状复杂，正常水深和临界水深的计算需求解超越方程，计算比较麻烦。根据明渠均匀流理论和临界水深理论，研究了马蹄形断面正常水深和临界水深的一般计算方法，并引入无量纲参数和优化拟合理论，得到了标准Ⅱ型马蹄形断面正常水深和临界水深的简化计算公式，公式形式简单，计算方便，精度满足工程设计要求。%With consideration of the complex geometrical form of the horseshoe-shaped section and the difficult compu-tation of the normal water depth and critical water depth,this paper studies the general method for calculating the normal water depth and critical water depth of horseshoe-shaped section according to the theory of open channel uniform flow and critical water depth, and introduces the dimensionless parameters and the approximate fitting theory and finally works out a simplified calculation formula for the normal water depth and critical water depth of horseshoe-shaped section. The formula is simple,convenient and of high accuracy and able to meet the requirement of the engineering design.