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先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程施工設(shè)計總說明目錄TOC\o"1-2"\h\u13515一、工程概況 216102二、工程等級和設(shè)計標準 2198052.1工程等級 2313122.2工程類型 236812.3設(shè)計使用年限 2219282.4設(shè)計標準 214548三、設(shè)計依據(jù)及技術(shù)規(guī)范 3230343.1設(shè)計依據(jù) 3300713.2設(shè)計規(guī)范 318787四、工程設(shè)計 4125204.1總體布置 433784.2供水系統(tǒng)方案 4188694.3工程建設(shè)內(nèi)容 5169474.4設(shè)計供水規(guī)模 5102594.5配水(管道)工程設(shè)計 7153844.6清水池設(shè)計 15215154.7加壓泵站設(shè)計 16249224.8供配電設(shè)計 1716364.9自動控制設(shè)計 202834五、主要技術(shù)(施工)要求 20208865.1施工總體說明 20124335.2施工內(nèi)容 21111365.3施工測量 2194095.4建(構(gòu))筑物土石方開挖、回填 2396675.5構(gòu)筑物基礎(chǔ)處理 2470685.6鋼筋混凝土工程 24209675.7砌體工程 2582445.8抹灰工程 26306465.9管道溝槽開挖回填 26102735.9管道施工 26142005.10預(yù)埋件施工 295979六、其他注意事項 30

一、工程概況項目名稱:先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程;建設(shè)性質(zhì):管網(wǎng)改造、管網(wǎng)新建;工程建設(shè)地點:工程水源:曹家墳新建水廠出廠水;供水規(guī)模:設(shè)計供水總規(guī)模2700m3/d;供水范圍:江津區(qū)先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程主要解決先鋒鎮(zhèn)夾灘社區(qū)片區(qū)及新祠堂、黃桷坪兩個片區(qū)的飲水安全問題,合計解決20309人的用水需求,其中移民人口131戶454人;遠期規(guī)劃供區(qū)為先鋒場鎮(zhèn)及場鎮(zhèn)北邊麻柳村、保坪村、五舉村、繡莊村、香草村、仙池村及先鋒鎮(zhèn)花椒產(chǎn)業(yè)園,規(guī)劃供水人口為49327人。主要建設(shè)內(nèi)容:本工程共鋪設(shè)管道合計284.17km(含管道及管道附屬設(shè)施),新建加壓泵站7座(含送水泵及配套機電設(shè)備、管路配件等);新建蓄水調(diào)節(jié)池5座,其中分水丘調(diào)節(jié)水池容積1200方,夾灘社區(qū)調(diào)節(jié)水池容積1200方,雞爪坡調(diào)節(jié)水池容積100方,新祠堂片區(qū)調(diào)節(jié)容積200方,黃桷坪片區(qū)調(diào)節(jié)水池容積300方。表1.1-1工程特性表編號項目單位數(shù)量備注一供水范圍和人口1夾灘社區(qū)片區(qū)人92382新祠堂片區(qū)人73073黃桷坪片區(qū)人37644總計人20309二工程規(guī)模和等級1用水定額L/(人·d)802設(shè)計供水規(guī)模m3/d27003設(shè)計取水總量萬m361.594工程類型型III5工程等級級56設(shè)計使用年限年307工程防洪標準年20三主要建設(shè)內(nèi)容1新建輸水管網(wǎng)km284.172分水丘1200方調(diào)節(jié)水池座13夾灘社區(qū)片區(qū)1200方調(diào)節(jié)水池座14雞爪坡100方調(diào)節(jié)水池座15新祠堂片區(qū)200方蓄水池座16黃桷坪片區(qū)300方蓄水池座17加壓泵站座7四施工工期月12五工程占地1臨時占地畝75.822永久占地畝1.73臨時占地畝77.52二、工程等級和設(shè)計標準2.1工程等級根據(jù)水利部發(fā)布的《水利水電工程等級劃分及洪水標準》(SL252-2017)中水利水電工程分等指標:本工程年引水量為61.59萬m3≤3000萬m3,工程規(guī)模為?。?)型,工程等別為V等。因此本工程主要建筑物按5級設(shè)計,次要建筑物按5級設(shè)計。2.2工程類型根據(jù)《村鎮(zhèn)供水工程技術(shù)規(guī)范》(SL310-2019),本工程的設(shè)計供水規(guī)模為2700m3/d,屬于III型集中式供水工程。2.3設(shè)計使用年限根據(jù)《水利水電工程合理使用年限及耐久性設(shè)計規(guī)范》(SL654-2014)的規(guī)定:水利水電工程各類永久性水工建筑物的合理使用年限,應(yīng)根據(jù)其所在工程的建筑物類別和級別按表3.0.3的規(guī)定確定,且不應(yīng)超過工程的合理使用年限。當永久性水工建筑物級別提高或降低時,其合理使用年限應(yīng)不變。因此本工程的合理使用年限為30年。2.4設(shè)計標準1、水源取水條件:水源來水量有保證,能滿足項目區(qū)人口安全供水的需要。2、水質(zhì)標準:水源水應(yīng)符合《生活飲用水水源水質(zhì)標準》(CJ3020-93)和《地表水環(huán)境質(zhì)量標準》(GB3838-2002)的要求,管網(wǎng)末梢水的水質(zhì)符合國家《生活飲用水衛(wèi)生標準》(GB5749-2006)的要求。3、供水方便程度:達到輻射范圍內(nèi)用戶都能用上衛(wèi)生的自來水。4、供水保證率:要求達到95%以上。5、服務(wù)水壓:根據(jù)《村鎮(zhèn)供水工程技術(shù)規(guī)范》確定水壓標準,供水水壓滿足配水管網(wǎng)中用戶接管點的最小服務(wù)水頭要求,一層為10米,二層為12米,二層以上每增加一層為4米,并按此要求進行水力計算,本次根據(jù)當?shù)亟ㄖ闆r將農(nóng)村確定為12m。6、工程防洪標準根據(jù)《室外給水設(shè)計標準》5.3.7的有關(guān)規(guī)定:江河、湖泊取水構(gòu)筑物的防洪標準不應(yīng)低于城市防洪標準。水庫取水構(gòu)筑物的防洪標準應(yīng)與水庫大壩等主要建筑物的防洪標準相同,并應(yīng)采用設(shè)計和校核兩級標準。本工程取水水源為曹家墳在建水廠出廠成品水,不涉及江河、胡泊、水庫等,因此其防洪標準根據(jù)《防洪標準》(GB50201-2014)以及《水利水電工程等級劃分及洪水標準》(SL252-2017)的有關(guān)規(guī)定進行設(shè)計,本次沿用水廠的設(shè)計洪水標準,本工程的主要建筑物級別為5級,按設(shè)計洪水重現(xiàn)期10年,校核洪水重現(xiàn)期20年進行設(shè)計。由于本次輸水管道、加壓泵房均為陸地建筑,因此可不考慮洪水對本工程影響。7、工程抗震標準按《中國地震動動參數(shù)區(qū)劃圖》(GB18306-2015),本次工程區(qū)為Ⅱ類場地,基本地震動峰值加速度為0.05g,基本地震動加速度反應(yīng)譜特征周期為0.35s,地震烈度為Ⅵ度,設(shè)計地震分組為第一組。三、設(shè)計依據(jù)及技術(shù)規(guī)范3.1設(shè)計依據(jù)(1)《重慶市江津區(qū)生態(tài)環(huán)境局關(guān)于加快推進江津區(qū)先鋒鎮(zhèn)筍溪河先鋒水廠水源地和麻柳堡平供水協(xié)會水源地環(huán)境突出問題整改的函》([2020]4772號)(2)《關(guān)于印發(fā)重慶市“萬人千噸”集中式飲用水水源地環(huán)境保護專項整治工作方案的函》(渝環(huán)函〔2019〕208號);(3)《關(guān)于印發(fā)江津區(qū)白沙鎮(zhèn)長江渝津公司(朝天嘴)水源地等5個集中式飲用水源地環(huán)境突出問題整治方案的通知》(江津府辦〔2019〕103號);(4)《重慶市江津區(qū)水利局關(guān)于《江津區(qū)先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程》初步設(shè)計的批復(fù)》(津水利【2021】18號);(5)《重慶市江津區(qū)水利局關(guān)于同意調(diào)整先鋒鎮(zhèn)農(nóng)村飲水鞏固提升工程建設(shè)內(nèi)容的函》(津水利函【2021】56號);(6)《重慶市江津區(qū)發(fā)展和改革委員會關(guān)于江津區(qū)先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程立項的批復(fù)》(津發(fā)改審【2021】128號);(7)《重慶市江津區(qū)發(fā)展和改革委員會關(guān)于江津區(qū)先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程可行性研究報告的批復(fù)》(津發(fā)改審【2021】144號)。3.2設(shè)計規(guī)范1、《重慶市農(nóng)村人飲項目建設(shè)管理實施細則》;2、《埋地聚乙烯給水管道工程技術(shù)規(guī)程》CJJ101-2004;3、《建筑給水硬聚氯乙烯管管道工程技術(shù)規(guī)程》CECS41:2004;4、《給水排水管道工程施工及驗收規(guī)范》(GB50268-2008);5、《重慶市鄉(xiāng)鎮(zhèn)供水工程技術(shù)規(guī)范》(DB50/T30-2000);6、《村鎮(zhèn)供水工程技術(shù)規(guī)范》(SL310-2019);7、《給水排水工程管道結(jié)構(gòu)設(shè)計規(guī)范》(GB50332-2002);8、《混凝土結(jié)構(gòu)設(shè)計規(guī)范》(GB50010-2010);9、《水利水電工程量計算規(guī)定》(SL328-2005);10、《建筑給水排水設(shè)計標準》GB50015-2019;11、《生活飲用水衛(wèi)生標準》GB5749-2006;12、《泵站設(shè)計規(guī)范》GB50265-2010;13、《地表水環(huán)境質(zhì)量標準》GB3838-2002;14、《生活飲用水水源水質(zhì)標準》CJ3020-93;15、《室外給水設(shè)計標準》GB50013-2018;16、《給水排水工程構(gòu)筑物結(jié)構(gòu)設(shè)計規(guī)范》GB50069-2002;17、《水工混凝土結(jié)構(gòu)設(shè)計規(guī)范》SL91-2008;18、《建筑結(jié)構(gòu)荷載規(guī)范》GB50009-2012;19、《建筑地基處理技術(shù)規(guī)范》JGJ79-2012;20、《室外給水排水和燃氣熱力工程抗震設(shè)計規(guī)范》GB50032-2003;21、《建筑工程抗震設(shè)防分類標準》GB50223-2008;22、《工程結(jié)構(gòu)可靠性設(shè)計統(tǒng)一標準》GB50153-2008四、工程設(shè)計4.1總體布置先鋒鎮(zhèn)根據(jù)本鎮(zhèn)安全飲水總體規(guī)劃布局,逐漸取消制水能力不強、制水成本高、運行管理不方便的小型水廠,通過申請國家專項資金、各級財政資金以及地方、企業(yè)資金注入,通過改造現(xiàn)有取水泵站,新建制水廠,新建管網(wǎng)、改造管網(wǎng)、新建調(diào)節(jié)蓄水池等措施逐漸覆蓋先鋒鎮(zhèn)內(nèi)所有用水單位和用水戶。根據(jù)上述規(guī)劃,先鋒鎮(zhèn)已先后申報《江津區(qū)先鋒鎮(zhèn)麻柳保坪取水點遷建工程》、《江津區(qū)先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程》兩個項目。其中,《江津區(qū)先鋒鎮(zhèn)麻柳保坪取水點遷建工程》主要建設(shè)內(nèi)容為供水總體規(guī)劃內(nèi)容中的取水工程部分:通過新建取水泵站及泵站至水廠的源水輸水管道解決水廠水源問題(取水泵站近期取水規(guī)模為5500m3/d,遠期隨著水廠擴容擴建至33000m3/d)(本項目立項審批中);《江津區(qū)先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程》主要建設(shè)內(nèi)容為本次總體規(guī)劃內(nèi)容的水廠制水工程和局部輸水主管:通過新建一座制水能力為5000m3/d的水廠(遠期將擴建至30000m3/d)解決水處理問題,并新建水廠至永豐村高位水池的輸水主管及附屬設(shè)施和永豐村二級加壓泵等,為遠期管道延伸打下基礎(chǔ)(本項目已經(jīng)取得批復(fù)文件,并正在建設(shè)中)。本次《江津區(qū)先鋒鎮(zhèn)夾灘社區(qū)農(nóng)村供水保障工程》作為供水總體規(guī)劃內(nèi)實施的第三個項目,在上述已規(guī)劃項目的基礎(chǔ)上,對供水區(qū)域進行細化和延伸,通過在在曹家墳水廠至永豐村高位水池的輸水主管上搭接管道并安裝支管、入戶管解決夾灘社區(qū)的安全飲水問題,并向新祠堂、黃桷坪兩個片區(qū)鋪設(shè)輸水主管、新建調(diào)節(jié)水池,為后期管網(wǎng)擴網(wǎng)打下基礎(chǔ);同時為了場鎮(zhèn)遠期發(fā)展需求和先鋒鎮(zhèn)花椒產(chǎn)業(yè)園的建設(shè),本次新建水廠至倦洞橋段輸水管道與分水丘已建高位水池的DN400管道相連接,并預(yù)留接口方便后期管網(wǎng)搭接和延伸。因此,本次實際解決供區(qū)主要為先鋒鎮(zhèn)夾灘社區(qū)片區(qū)及新祠堂、黃桷坪兩個片區(qū),合計解決20309人的用水需求,其中移民人口131戶454人;遠期規(guī)劃供區(qū)為先鋒場鎮(zhèn)及場鎮(zhèn)北邊麻柳村、保坪村、五舉村、繡莊村、香草村、仙池村及先鋒鎮(zhèn)花椒產(chǎn)業(yè)園,規(guī)劃供水人口為49327人。4.2供水系統(tǒng)方案由于前端取水工程及制水工程和局部管道已納入其他項目進行規(guī)劃實施,因此本次管網(wǎng)建設(shè)時,無需考慮本工程前端源水取水工程及制水工程部分,可直接從在建水廠至永豐村高位水池的輸水管道上搭接,通過本次新建的管道和二級加壓泵站輸水至供區(qū)即可滿足供區(qū)用水需求。通過方案設(shè)計和經(jīng)過上述技術(shù)分析,結(jié)合本項目的實際情況,確定本項目的供水系統(tǒng)方案如下:夾灘社區(qū)片區(qū):本片區(qū)考慮管道安裝入戶,主要建設(shè)內(nèi)容為新建輸水主管、支管、入戶管、蓄水調(diào)節(jié)水池、加壓泵站。本次從在建曹家墳水廠至永豐村調(diào)節(jié)水池段輸水管道上搭接,搭接點分別位于牛角沱(點號A)、筍溪河大橋左岸橋頭(點號Z2)、雞爪坡路口(點號Z3),并在蘇麻灣東側(cè)山頂上新建夾灘社區(qū)片區(qū)1200方調(diào)節(jié)蓄水池用于調(diào)節(jié)夾灘社區(qū)用水,在雞爪坡山頂處新建100方調(diào)節(jié)蓄水池,用于調(diào)節(jié)H區(qū)用水需求,遠期可向周邊低洼處進一步擴展管網(wǎng)擴大供水面積。新祠堂、黃桷坪片區(qū):本片區(qū)僅考慮供水主管和蓄水調(diào)節(jié)水池,主要建設(shè)內(nèi)容為新建輸水主管、蓄水調(diào)節(jié)水池、加壓泵站。本次從在建曹家墳水廠至永豐村調(diào)節(jié)水池段輸水管道上搭接,搭接點位于白楊灣路口(點號Z4),通過新建管道輸和加壓泵站,并在新祠堂片區(qū)新建200方調(diào)節(jié)蓄水池、黃桷坪片區(qū)新建300方調(diào)節(jié)蓄水池,從而保證新祠堂、黃桷坪片區(qū)的水量和供水壓力,滿足該片區(qū)的用水需求,后期根據(jù)資金投入再鋪設(shè)支管和入戶管,從而解決兩個片區(qū)的安全用水問題。先鋒場鎮(zhèn)及場鎮(zhèn)北邊區(qū)域:本片區(qū)僅考慮輸水主管及蓄水調(diào)節(jié)水池,主要建設(shè)內(nèi)容為新建輸水主管、蓄水調(diào)節(jié)水池。先鋒場鎮(zhèn)及場鎮(zhèn)北邊麻柳村、保坪村、五舉村、繡莊村、香草村、仙池村及先鋒鎮(zhèn)花椒產(chǎn)業(yè)園區(qū)域,本次鋪設(shè)水廠至倦洞橋段(SC—Z7—Z8段)輸水主管(本段輸水管與在建水廠至永豐村高位水池段輸水管獨立運行,廠區(qū)接入點為水廠泵房出水管)與已建DN400管道搭接(搭接點位于倦洞橋處已成閘閥井,點號Z8),并在施家橋處(點號Z7)預(yù)留DN400搭接口,為后期管網(wǎng)向北延伸擴展打下基礎(chǔ);同時為了滿足在建曹家墳水廠遠期擴容后的調(diào)節(jié)用水需求和場鎮(zhèn)用水需求,本次提前在分水丘處新建1座容積為1200方的調(diào)節(jié)蓄水池。4.3工程建設(shè)內(nèi)容本工程共鋪設(shè)管道合計284.17km(含管道及管道附屬設(shè)施),新建加壓泵站7座(含送水泵及配套機電設(shè)備、管路配件等);新建蓄水調(diào)節(jié)池5座,其中分水丘調(diào)節(jié)水池容積1200方,夾灘社區(qū)調(diào)節(jié)水池容積1200方,雞爪坡調(diào)節(jié)水池容積100方,新祠堂片區(qū)調(diào)節(jié)容積200方,黃桷坪片區(qū)調(diào)節(jié)水池容積300方。表4.3-1工程主要建設(shè)內(nèi)容表編號項目單位數(shù)量備注一輸水管網(wǎng)部分(一)水廠北邊區(qū)域主管1DN500PE100管(1.6Mpa)m9332DN400PE100管(1.6Mpa)m190(二)夾灘社區(qū)輸水管1DN250PE100管(1.6Mpa)m14972DN200PE100管(1.6Mpa)m41263DN110PE100管(1.6Mpa)m41924DN90PE100管(1.6Mpa)m53795DN75PE100管(1.6Mpa)m139386DN50PE100管(1.6Mpa)m229267DN32PE100管(1.6Mpa)m380228DN25PE100管(1.6Mpa)m227009DN20PE100管(1.6Mpa)m157760(三)新祠堂、黃桷坪片區(qū)主管1DN200PE100管(1.6Mpa)m42432De200*6.0涂塑鋼管m20303De150*4.0涂塑鋼管m6230二清水池部分建基面高程1分水丘1200方蓄水池座1高程:345.002夾灘社區(qū)1200方蓄水池座1高程:242.003雞爪坡100方蓄水池座1高程:277.604黃桷坪片區(qū)300方蓄水池座1高程:531.005新祠堂片區(qū)200方蓄水池座1高程:426.80三加壓泵房部分流量揚程1大土灣加壓泵站Q=1.2m3/hH=70高程:238.002干壩子加壓泵站Q=7m3/hH=70高程:267.003黎家灣加壓泵站Q=1.2m3/hH=30高程:278.004黃荊梁加壓泵站Q=1.2m3/hH=45高程:226.005黃桷坪加壓泵站Q=18.3m3/hH=70高程:257.006水井灣加壓泵站Q=85m3/hH=150高程:307.007回龍崗加壓泵站Q=56m3/hH=105高程:384.004.4設(shè)計供水規(guī)模4.4.1設(shè)計供水人口根據(jù)江津區(qū)《2020年重慶市江津區(qū)國民經(jīng)濟和社會發(fā)展統(tǒng)計公報》(重慶市江津區(qū)統(tǒng)計局

國家統(tǒng)計局江津調(diào)查隊(2021年2月10日))中數(shù)據(jù):江津區(qū)戶籍人口自然增長率-2.7‰,因此本次不考慮人口增長率。故在設(shè)計水平年2035年末的人口規(guī)模見下表:表4.4-1設(shè)計水平年末人口規(guī)模統(tǒng)計表村名現(xiàn)有人口數(shù)(人)人口年均增長率設(shè)計年限(年)設(shè)計年限內(nèi)人口的機械增長總數(shù)設(shè)計水平年年末人數(shù)(人)設(shè)計用水人口數(shù)P0γnP機P1P夾灘社區(qū)片區(qū)92380.00015092389238新祠堂片區(qū)73070.00015073077307黃桷坪片區(qū)37640.00015037643764合計20309020309203094.4.2用水定額最高日居民生活用水定額應(yīng)按照《村鎮(zhèn)供水工程技術(shù)規(guī)范》(SL310-2019)表4.1.2選取,先鋒鎮(zhèn)屬于四區(qū),為二類供水條件:水龍頭入戶,基本全日制供水,室內(nèi)有洗滌池,少量衛(wèi)生設(shè)施,用水定額取60~90L/(人·d)。本次供區(qū)主要為農(nóng)村,用水條件一般,發(fā)展?jié)摿^小,因此本次用水定額取值80L/(人·d)。4.4.3設(shè)計供水規(guī)模1、供水定額及用水量根據(jù)《村鎮(zhèn)供水工程技術(shù)規(guī)范》的規(guī)定,村鎮(zhèn)供水范圍包括居民生活用水Q1、公共建筑用水Q2、集體或?qū)I(yè)飼養(yǎng)禽畜用水Q3、企業(yè)用水Q4、澆灑道路和綠地用水Q5、管網(wǎng)損失用水和未預(yù)見水量Q6、消防用水Q7等。(1)居民生活用水量本次用水定額為80L/(人·d),設(shè)計用水人口20309人,則居民生活用水量為1625m3/d。(2)公共建筑用水公共建筑用水量應(yīng)根據(jù)公共建筑性質(zhì)、規(guī)模及用水定額確定。缺乏資料時,集鎮(zhèn)和鄉(xiāng)鎮(zhèn)府所在地公共建筑用水量可按居民生活用水量的10%~15%估算,建制鎮(zhèn)為15%~25%估算。本次供區(qū)周邊有村委會、村公共服務(wù)中心、走讀制學(xué)校等公用設(shè)施,因此學(xué)校學(xué)生用水定額取30L/(人·d),其他公共建筑用水考慮10%。(3)集體或?qū)I(yè)飼養(yǎng)禽畜用水根據(jù)供水范圍內(nèi)的村鎮(zhèn)企業(yè)和專業(yè)戶飼養(yǎng)禽畜的用水現(xiàn)狀、近5年的發(fā)展計劃以及水源充沛程度分析確定是否納入供水范圍。經(jīng)實地調(diào)查,本項目區(qū)存在多個養(yǎng)殖場,分別育有肥豬、成牛、羊、雞鴨等,因此本次根據(jù)規(guī)范各種牲用水定額分別為豬30L/(頭·d)、牛50L/(頭·d)、羊10L/(頭·d)、雞(鴨)1L/(只·d)。(4)村鎮(zhèn)企業(yè)根據(jù)《村鎮(zhèn)供水工程技術(shù)規(guī)范》(SL310-2019)規(guī)定,企業(yè)日用水量應(yīng)根據(jù)以下要求確定:①企業(yè)生產(chǎn)用水量應(yīng)根據(jù)企業(yè)類型、規(guī)模、生產(chǎn)工藝、用水現(xiàn)狀、近期發(fā)展計劃和當?shù)氐纳a(chǎn)用水定額標準確定。根據(jù)調(diào)查:本次供區(qū)內(nèi)用水企業(yè)為夾灘社區(qū)中石油天然氣凈化廠,其用水規(guī)模為300m3/d。(5)澆灑道路和綠地用水按《村鎮(zhèn)供水工程技術(shù)規(guī)范》的規(guī)定:經(jīng)濟條件較好,規(guī)模較大的各規(guī)模建制鎮(zhèn)分別是各鎮(zhèn)的經(jīng)濟文化中心,各功能設(shè)施齊備的鎮(zhèn)可根據(jù)澆灑道路和綠地的面積計算用水量。其余鎮(zhèn)(鄉(xiāng))、村可不考慮此項。因此,本次供區(qū)為鄉(xiāng)村,不考慮此項用水(Q5為0)。(6)管網(wǎng)損失用水和未預(yù)見水量管網(wǎng)漏失水量和未預(yù)見水量之和,按上述用水量之和的10%~25%取值,IV、V型供水工程取低值,I~III型取高值。本部分水量可按總供水量的20%計。(7)消防用水量根據(jù)《村鎮(zhèn)供水工程技術(shù)規(guī)范》的規(guī)定:消防用水量應(yīng)按照《建筑設(shè)計防火規(guī)范》(GBJ16)和《村鎮(zhèn)建筑設(shè)計防火規(guī)范》(GBJ39)的有關(guān)規(guī)定確定。根據(jù)《消防給水及消火栓系統(tǒng)技術(shù)規(guī)范》(GB50974-2014)的規(guī)定,規(guī)劃人口N≤5萬人,室外消防用水量可按照同一時間內(nèi)火災(zāi)發(fā)生次數(shù)為1次,一起滅火用水量為35L/s,火災(zāi)持續(xù)時間為2h計算,一次滅火的用水量為207m3。由于本工程供水管網(wǎng)的供水能力遠大于消防用水量,且本次供區(qū)范圍內(nèi)夾灘場鎮(zhèn)周邊有河道及眾多山坪塘,水量充足、來水可靠、取用方便可作為消防水源,因此本次規(guī)模計算不考慮消防用水(Q7為0)。2、供水規(guī)模供水規(guī)模計算成果見下表:表4.4-2供水規(guī)模計算成果表符號名稱說明單位或定額夾灘社區(qū)黃桷坪片區(qū)新祠堂片區(qū)合計P0現(xiàn)狀人口人92387307376420309人口增長率本次不考慮人口增長率%0000P1設(shè)計用水人口人92387307376420309P機機械增長人口本次不考慮機械增長人口人0000P設(shè)計用水總?cè)丝谌?2387307376420309q用水定額L/(人·d)80808080Q1居民生活用水量m3/d7395853011625Q2公共建筑用水學(xué)校人口人30002002003400學(xué)校用水總量30L/(人·d)9066102其他公共建筑用水m3/d745830162公共建筑用水總量m3/d1646436264Q3集體或?qū)I(yè)飼養(yǎng)禽畜用水豬:30L/(頭·d)m3/d3331854牛:50L/(頭·d)m3/d0000羊:10L/(頭·d)m3/d0303雞、鴨:1L/(只·d)m3/d0000集體或?qū)I(yè)飼養(yǎng)禽畜用水m3/d3361857Q4企業(yè)用水m3/d30000300Q5澆灑道路和綠地用水不考慮m3/d0000Q6管網(wǎng)損失用水和未預(yù)見水量考慮15%m3/d24113771449Q7消防用水量不考慮m3/d0000Q需需水規(guī)模m3/d14478214262695Q供設(shè)計取值14478214262700根據(jù)上表計算成果,本次解決先鋒鎮(zhèn)夾灘社區(qū)片區(qū)及夾灘社區(qū)往新祠堂、黃桷坪方向兩個片區(qū)合計解決20309人的用水需求,供區(qū)設(shè)計需水總量為2700m3/d。4.4.4用水變化系數(shù)1、時變化系數(shù)根據(jù)《村鎮(zhèn)供水工程技術(shù)規(guī)范》(SL310-2019),農(nóng)村用水變化系數(shù)及供水時間由供水規(guī)模確定。本工程設(shè)計供水規(guī)模為2700m3/d,因此時變化系數(shù)Kh=1.8。2、日變化系數(shù)根據(jù)《村鎮(zhèn)供水工程技術(shù)規(guī)范》(SL310-2019),結(jié)合江津區(qū)相似供水工程的年內(nèi)供水變化情況綜合分析確定。項目區(qū)年內(nèi)供水變化較小,綜合考慮后,日變化系數(shù)取Kd=1.6。4.5配水(管道)工程設(shè)計4.5.1管材選擇本次管道建設(shè)采用PE管,其造價便宜,易于維護管理,減少運行管理成本,且管道無毒無害,化學(xué)性質(zhì)穩(wěn)定,保證了飲用水清潔衛(wèi)生,是近年來國家水利部、建設(shè)部大力推廣的新型綠色環(huán)保型給水材料,其中Z5~Z6段由于地形高差較大,加壓水頭較大,普通PE管抗壓等級(最大抗壓等級1.6Mpa)不滿足需求,因此本段采用涂塑鋼管。4.5.2管道水力計算1、人均用水當量人均用水當量采用下列公式計算:式中:q—人均用水當量,L/(h·人);W—村或鎮(zhèn)的最高日用水量,m3/d;W1—企業(yè)、機關(guān)及學(xué)校等用水大戶的用水量之和,m3/d;Kh—時變化系數(shù),取1.8;P—村鎮(zhèn)設(shè)計用水人口,人;則q=7.68L/(h·人)。2、沿線流量沿線流量按照下列公式計算式中:qL—管段沿線流量,m3/s;q—人均用水當量,L/(h·人);N—管段沿途兩側(cè)用水人口,人;(3)輸水管徑輸水管徑采用下列公式計算:式中:qL—管段沿線流量,m3/s;v—經(jīng)濟流速,根據(jù)規(guī)范取V=1.0m/s。管道水頭損失計算包括沿程水頭損失和局部水頭損失,管道沿程水頭損失按《村鎮(zhèn)供水工程技術(shù)規(guī)范》式(7.3.7-1、2)計算,局部水頭損失按照沿程水頭損失的10%計算,計算公式如下:;;式中:h1—沿程水頭損失,m;L—計算管段長度,m;i—單位長度水頭損失,m/m;C—海曾威廉系數(shù),根據(jù)規(guī)范,本次鋼管取120,塑料管取140;Q—管段流量,m3/s;d—管道內(nèi)徑,m。本次設(shè)計的配水工程管網(wǎng)為樹枝狀管網(wǎng)布置方式,通過對用水點位置分布和地勢情況進行綜合分析,本次供區(qū)覆蓋面積廣,管線鋪設(shè)長,供區(qū)地形高低起伏較大,不具備采用分區(qū)供水的條件,因此本次進行水力計算時,局部區(qū)域在已經(jīng)考慮《江津區(qū)先鋒鎮(zhèn)永豐村農(nóng)村飲水鞏固提升工程》中規(guī)劃設(shè)計的輸水管道及加壓水頭(水廠加壓泵站加壓水頭80m,永豐村二級加壓泵站加壓水頭90m)后,自由水頭仍不滿足供水需求,因此本次計算時將供區(qū)內(nèi)需要新建的加壓泵站的加壓水頭疊加進本次管網(wǎng)水力計算,結(jié)合管線布局得出管網(wǎng)水力計算試算成果,詳見下表:表4.5-1輸水管道水力計算成果表管段編號用水人口設(shè)計流量計算管徑管徑管段長度單位管長水頭損失系數(shù)總水頭損失進水節(jié)點高程出水節(jié)點高程自由水頭水壓線標高加/減壓XX--XX人m3/hmmmmmmmmm供區(qū)H區(qū)H29-H31180.140.007254430.0010.63217.0220.023.57243.57H29-H30100.080.005253470.0000.16217.0200.044.03244.03H27-H29280.220.009323280.0010.32226.0217.027.20244.20H27-H28230.180.008251720.0020.38226.0208.036.14244.14H19-H27510.390.012501210.0000.04226.0226.018.52244.52H24-H261160.890.01832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