梯形路缘石开口流量计算探讨

Discussion on flow calculation of Trapezoidal Curbstone Opening

本文探讨了海绵城市设计中梯形路缘石开口流量的计算方法。针对当前国内设计标准缺乏路缘石开口流量计算依据的现状,提出了基于水力学堰流计算原理的流量计算方法。首先,分析了纵坡底部矩形路缘石开口流量的计算。其次,提出了通过积分方程求解纵坡底部梯形路缘石开口三角形断面开口流量的方法,并证明其与等效宽度的矩形断面开口流量相等。最后,将等效宽度的概念运用到连续纵坡段梯形路缘石开口的计算中。为海绵城市设计中路缘石开口流量的计算提供了实用的计算方法。

This paper discusses the method of calculating the flow rate of trapezoidal curbstone opening in sponge city design.In view of the lack of calculation basis of the current domestic design standards,a method of flow calculation based on hydraulic weir flow is proposed.Firstly,the calculation of the flow rate of the rectangular curbstone opening at the bottom of the vertical slope is analyzed.Secondly,the method of solving the flow rate of the triangular section of trapezoidal curbstone opening at the bottom of the longitudinal slope by integral equation is proposed,and it is proved that the flow rate is equal to that of the rectangular section opening with equivalent width.Finally,the concept of equivalent width is applied to the calculation of the trapezoidal curbstone opening along the continuous longitudinal slope section.This paper provides a practical method for calculating the flow of curbstone opening along the road in sponge city design.