给排水管网设计重点.doc

摘要 本设计是安徽省芜湖市芜湖县管网的设计，包括给水系统，污水排水系统和雨水排水系统三个部分。其中给水系统是通过地形地貌、已知水文条件结合给水管网布置原则进行设计计算的。给水系统设计步骤：根据城市单位人口综合用水量计算用户近期和远期用水量，进行管网定线，计算管段设计流量、管径和水头损失；最高时环状网管网平差计算；确定水泵扬程；分别进行不利管段事故时、消防时的校核计算。 排水工程在工程环境保护、保障人民健康和经济上有重要意义。排水体制一般可分为两种类型：合流制和分流制。本设计根据当地地形特点和经济状况，采用雨水、污水分流制。污水管网定线；计算排水街区的面积；污水干管和主干管的设计计算。 污水排水系统的设计内容包括排水系统的体制选择、划分排水区域、结合设计要点和自然因素将主干管连入已知污水厂；计算污水设计流量；确定设计参数；绘制管道总平面图。 雨水排水系统的设计内容包括进行雨水管渠定线，划分排水面积，拟定出水口的位置；进行雨水管渠水力计算，确定设计参数；确定管渠总平面图。 关键词：给水排水管网、管网平差，管网校核、地理信息系统、工程设计 Abstract This design is the pipe network design of wuhu county in Anhui province,including water supply system, sewage drainage and rainwater drainage system three parts. The water supply system carrys on the design calculation by topography,geomorphology and in combination the known conditions of hydrology with layout principus of water supply pipe network.Steps of feed system’s design arethat people can calculate the user’s short-term and long-term water consumption according to comprehensive water consumption of urban unit population for pipeline routing,and the calculation of designing flow rate,pipe diameter and head loss;the calculation of the highest ring network adjustment; the determination of the pump head; and the check calculation separately when the bad section or fire accient. Drainage engineering in the engineering of environmental protection, safeguard peoples health and economy has important significance. Drainage system in general can be divided into two types: the confluence system and distribution system.According to the local terrain characteristics and economic conditions, this design adapts to the system of rainwater and the sewage diversion.People proceed to route sewage pipe network,and calculate the area of drainage block and the design of the trunk sewer and main pipe. Sewage drainage system design content includes the choice of drainage system, drainage area, combining with the design points and natural factors will ZhuGanGuan connected to sewage plant