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X1市给水工程初步设计摘要X1市位于湘南省西部，是一个古老而美丽的城镇，位于溆水中游，近期规划人口12万人，远期发展到20万，市区已建了一座3万m3/d的水厂。随着经济的发展、用水量的增长，现有供水能力已满足不了正常的生产和生活所需。根据城市总体规划，拟在溆水上游建设一新水厂。新水厂建成后，与老厂联合向管网供水，形成统一供水的局面。本设计的主要内容包括：取水构筑物设计；净水厂设计；输配水管网设计；工程概预算四部分。根据城市管网供水的需要，计算得新水厂近期供水规模为5万m3/d，远期为10万m3/d。为保证出水水质，所以新水厂处理工艺采用常规处理＋深度处理（臭氧－生物活性炭），增加深度处理后，能使出厂水水质明显提高。工程建设总投资为9373.65万元,单位制水成本为0.85元/3m。关键词：取水构筑物，净水厂，常规处理工艺，V型滤池，配水管网，概预算AbstractAsanancientandbeautifulcity,X1cityislocatedinthewestofHunan.OnthemiddlereachesofXuRiver,thecityhasaplanningpopulationof120,000which,inlongterm,willbeexpandedto200,000.Therehasalreadybeena30,000m3/dwaterworksinthedowntownarea.Withthedevelopmentofeconomyandtheincreasingdemandofwater,itscurrentwatersupplyingcapacitycannotmeettherequirementofregularproductionandpeople’sdailylife.Accordingtothecity’scomprehensiveplanning,itisproposedthatanewwaterworksshouldbeconstructedontheupperreachesofXuRiver.Whenitiscompleted,thenewwaterworkswillbejoinedbytheoldonetosupplywatertothepipenetwork,thusmakingastateofunifiedwatersupply.Thisdesignmainlycoversfourpartswhichare:thewaterintakeworks,thepurificationplant,thetubewebsystemofcarryingandprovidingwater,andthebudgetaryestimationofthedesign.Accordingtothedemandofthepipenetwork,itiscalculatedthattheshort-termwatersupplyscaleofthenewwaterworksis50,000m3/dandthelong-termoneis100,000m3/d.Thewatertreatmentprocessofthenewwatertreatmentplantintroducesboththeconventionaltreatmentandtheadvancedtreatmentsoastoremovethehazardoussubstances;Addingadvancedtreatment,thequalityoftheeffluencewillbeimprovedobviously.Thetotalinvestmentofthedesignis93,736,500Yuanandthecostanalysisperunitis0.85Yuan/m3.Keywords：waterintakeworks，purificationplant，routinelyprocessing，V-shapedfilterchamber，waterdistributionnetwork，budgetaryestimation目录1设计原始资料及设计任务....................................................................................VII1.1原始资料......................................................................................................VII1.1.1自然条件.............................................................................................VII1.1.2城市概况及供水现状.........................................................................VII1.1.3供水规划...........................................................................................VIII1.2设计目的和要求.........................................................................................VIII1.2.1设计目的...........................................................................................VIII1.2.2设计要求..............................................................................................IX1.3设计范围........................................................................................................IX1.4设计依据........................................................................................................IX2设计水量计算...........................................................................................................X2.1近远期规划设计用水量计算.........................................................................X2.1.1最高日用水量计算...............................................................................X2.1.2最高日最高时用水量计算.................................................................XII2.1.3设计流量的确定.................................................................................XII3输配水工艺计算...................................................................................................XIV3.1管材的选择..................................................................................................XIV3.2流量计算.......................................................................................................XV3.2.1比流量计算..........................................................................................XV3.2.2沿线流量计算....................................................................................XVI3.2.3节点流量计算.................................................................................XVIII3.3初始流量分配...........................................................................................XVIII3.4管径的确定..................................................................................................XIX3.5管网水力计算..............................................................................................XXI3.5.1最高用水时管网平差.........................................................................XXI3.5.2消防时校核.....................................................................................XXVII3.5.3事故时校核.....................................................................................XXXII3.6方案技术经济计算..............................................................................XXXVII4净水厂工艺设计计算...................................................................................XXXVIII4.1给水厂处理规模及工艺流程方案....................................................XXXVIII4.1.1给水处理厂的设计规模............................................................XXXVIII4.1.2工艺流程的选择...........................................................................XXXIX4.2水处理构筑物计算...............................