给水排水管网系统课程设计（ⅰ）说明书-杨柳镇排水管网设计

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1、给水排水管网系统课程设计（Ⅰ）说明书设计题目：杨柳镇排水管网设计专业：给水排水工程班级：09级02班姓名：学号：指导老师：2011年12月31日24目录第一章基本资料及概述······································21.1.基本资料··············································21.2设计依据···················································31.3.排水管网设计任务···································

2、········4第二章污水管道设计计算说明········································42.1排水系统的体制及其选择······································52.2排水系统的布置·································52.3污水管网的布置··········································52.4污水管道系统的设计24·································52.5污水管道系统水力计算············

3、·······························82.6管材、出水口·············································142.7成果图绘制·················································142.8注意事项··················································14第三章雨水管道设计计算说明········································153.1.划分排水流域及管道定线··········

4、···························163.2.主要设计参数···············································18（1）暴雨强度公式···············································18（2）24地面径流和径流系数··········································18（3）折减系数··················································193.3.雨水管道水力计算···········

5、································203.4雨水管渠构筑物···········································213.5.成果图绘制·················································213.6注意事项···········································21第四章设计体会及参考资料·······························22第一章基本资料1.1城市基础资料1.城市位于中国西南地区重庆，给水水源位置见城市

6、总平面图。2.城区地质情况良好，土壤为砂质粘土，冰冻深度不加考虑，地下水位距地表8m；该市的地貌属丘陵地区，海拔标高一般为270～320m。243.城市居住区面积115公顷，老城区占人口2.0万，新城区占人口3.5万。给水人口普及率为95%，污水收集率90％。4.暴雨强度公式：选用如下暴雨强度公式。(L/s·ha)；（1）5.城市常年主导风向为北风和西北风，夏季平均风速1.6m/s；冬季平均风速1.4m/s。6.本市附近某江穿城而过，在支流与干流交汇处，河流历史最高洪水位283.4m，二十年一遇洪水位281.8m，95%保证率的枯水位278.2m，常水位279.5m

7、，河床标高277.8m，平均水面坡降3‰。7.老城区中有部分合流制管渠，但多为石砌暗沟，设在人行道下面，盖板裸露地面。由于断面较小，加以年久失修，有的已堵塞或断裂。新城区中建有一些分流制排水管网，但未真正分流。由于排水管道长度短，覆盖率低，城区中未有形成排水管网，致使城区污水未经处理就排入水体，对某江造成严重污染。为了保护环境，防止某江水质的进一步恶化，推进该市经济的持续发展，因此要求建设排水管渠，对该市污水进行收集、处理，以适应市政建设发展的需要。8.城区主要工厂的工业废水量及职工人数见表1，污水水质见表2。9.主要大型公共建筑主要有车站、公园、医院、中学等，