YJ县县城排水管网设计.docVIP

YJ县县城排水管网设计 摘要： 排水管网是现代化城市和工业区必不可少的一项重要基础设施，同时也是控制水污染、改善和保护环境的重要工程设施。 本设计是YJ县县城排水管网工程的设计，包括污水管网的设计和雨水管网的设计。通过比选确定该县的排水体制为雨、污分流制。污水管网系统的设计包括：划分排水面积，布置排水管道系统，根据设计人口数和污水定额计算各管段污水的设计流量，对管网进行水力计算（确定管道断面尺寸、设计坡度、埋设深度等设计参数），绘制管道平面图和纵剖面图。雨水管网系统的设计包括：划分排水面积，雨水管渠的定线，划分设计管段，计算各管段设计流量；对雨水管渠进行水力计算（确定管渠的断面尺寸、坡度、标高、及埋深等设计参数），绘制管渠平面图和纵剖面图。 一个城市排水管网设计是否合理，直接关系到城市未来的发展，影响着市民的生活水平的提高，决定着城市的形象和投资环境。 关键词：排水管网；分流制；管网平面布置；设计流量；水力计算 ABSRACT： Drainage network is an important and indispensable infrastructure of modern cities and industrial areas, and it is also one of the most important measures to control the water pollution and protect the environment. This design is about the drainage pipe network engineering project of Town YJ in Henan Province in China. The project includes the layout of sewage and storm-water drainage system .Through optimum seeking method, it is decided that Town YJ takes the separate drainage system, namely, sewage and storm-water respectively use their own drainage systems. The design of sewage drainage system includes: the diversion of the drainage area, the layout of the drainage pipeline system, calculating the design flow of each pipe according to the design population and sewage fixed; making hydraulic calculations about the pipe network system to determine the section size ，design slope, planted depth and some other parameters of the pipe; the determination of the location of the sewage pipe; drawing plane and vertical section plans about the pipeline. The design of water-storm drainage system is alike. Here not bother to represent. Whether the drainage system of a city is good or not, is largely connected with the future development of the city and the improvement of the living condition of the citizens. It also decides the image of the city and the investment environment, and even is related with the safety. Keywords: sewage drainage pipe network; layout of the pipe network: design flow; hydraulic calculation 目录 摘要： 1 ABSRACT： 2 引言 3 第1章 概述 4 1.1地形及城市概