摘要
《室外排水设计标准》对排水系统雨水量计算方法作出规定,当汇水面积小于等于2 km^(2)时应采用推理公式法,当汇水面积大于2 km^(2)时宜采用数学模型法。推理公式法设计排水管网是数学模型法应用的基础。两方法计算原理有本质差异,数学模型法旨在优化推理公式法设计管网。引用设计实例,先采用推理公式法设计管网,再应用数学模型法对设计管网进行校验,并对比分析。结果表明:不同设计雨型对模拟结果有较大影响;推理公式法设计管网及达到一定设计规模的初雨调蓄池可起到径流量峰值消减的作用,可减小错峰调蓄池的容积甚至取消其设置;排水管网超负荷状态受雨型、泵站排水能力及调蓄设施等因素影响,规范未对其允许程度做明确规定。
The“Standard for design of outdoor wastewater engineering”stipulates the calculation method of rainwater volume in the drainage system.When the catchment area is less than or equal to 2 km^(2),the rational method should be adopted,and when the catchment area is greater than 2 km^(2),the mathematical model method should be adopted.The design of drainage network by reasoning formula method is the basis of the application of mathematical model method.The calculation principles of the two methods are essentially different.The mathematical model method aims to optimize the reasoning formula method to design the pipe network.The article quotes design examples,Firstly,rational method is used to design the pipe network,and then the mathematical model method is used to verify the design pipe network,and the comparative analysis is made.The results show that different designed rain pat terns have a greater impact on the simulation results;rational method to design the pipe network and the initial rainwater storage tanks that reach a certain design scale can play a role in reducing the peak runoff and reduce the peak shifting storage tanks.The capacity of the drainage pipe network is even cancelled;The standard does not clearly stipulate the extent to which the overload status of the drainage network is affected by factors such as rain patterns,pump station drainage capacity,and storage facilities.
作者
元绍建
董志虎
YUAN Shaojian;DONG Zhihu(Tianjin Municipal Engineering Design&Research Institute Co.,Ltd.,Tianjin 300380,China)
出处
《给水排水》
CSCD
北大核心
2022年第S02期416-422,共7页
Water & Wastewater Engineering
关键词
推理公式法
数学模型法
排水管网
设计雨型
初雨调蓄池
错峰调蓄池
Rational method
Mathematical model method
Drainage pipe network
Rain pattern
Initial rainwater storage tank
Peak shifting storage tank
