【正文】 ...... 3 2． 3工程設(shè)計(jì)標(biāo)準(zhǔn) .................................................................................................... 5 2． 3． 1水量、水質(zhì)和水壓目標(biāo) ......................................................................... 5 2． 3． 2環(huán)境保護(hù)目標(biāo) ....................................................................................... 5 3 給水工程設(shè) 計(jì) ................................................................................................................ 5 3． 1用水量計(jì)算 ....................................................................................................... 5 3． 2給水水源的選擇 ................................................................................................ 6 3． 3廠址選擇 ........................................................................................................... 6 3． 4凈水方案的比較和選擇 ...................................................................................... 6 3． 4． 1凈水方案 .............................................................................................. 6 3． 4． 2方案比較 .............................................................................................. 6 3． 4． 3方案綜合比較 ....................................................................................... 9 3． 5輸水管和給水管網(wǎng) ............................................................................................. 9 3． 5． 1管網(wǎng)系統(tǒng)的布置原則 ............................................................................. 9 3． 5． 2管網(wǎng)布線和方案比較 ........................................................................... 10 3． 5． 3方案比較 ............................................................................................ 11 3． 5． 4輸水管渠 ............................................................................................ 11 3． 6取水構(gòu)筑物 ..................................................................................................... 12 3． 6． 1取水位置的選擇 .................................................................................. 12 3． 6． 2取水構(gòu)筑物的選型 .............................................................................. 13 3． 6． 3取水頭部的選擇 .................................................................................. 13 3． 6． 4自流管取水 ......................................................................................... 13 3． 6． 5格柵 ................................................................................................... 14 3． 6． 6平板格網(wǎng) ............................................................................................ 14 3． 7凈水廠 ............................................................................................................ 14 3． 7． 1混凝劑和助凝劑的投配 ....................................................................... 14 3． 7． 2機(jī)械混合池 ......................................................................................... 16 3． 7． 3機(jī)械絮凝池 ......................................................................................... 16 3． 7． 4斜管式沉淀池 ..................................................................................... 19 3． 7． 5 雙閥濾池 ............................................................................................ 22 3． 7． 5清水池 ................................................................................................ 28 3． 7． 6加氯 ................................................................................................... 29 3． 7． 7一級(jí)泵房設(shè)計(jì) ..................................................................................... 31 3． 7． 8 二級(jí)泵房 ............................................................................................ 33 3． 7． 9水廠平面和高程布置 ........................................................................... 38 4 投資估算 ..................................................................................................................... 39 4. 1工程概況 .......................................................................................................... 39 4. 2管道工程造價(jià)估算 ............................................................................................ 40 4. 3給水廠造價(jià)估算 ................................................................................................ 40 4. 4整套工程造價(jià)估算 ............................................................................................ 41 第二篇 計(jì)算書(shū) ............................................................................................................... 42 1 用水量計(jì)算 ................................................................................................................. 42 1． 1給水工程規(guī)模數(shù)據(jù) ........................................................................................... 42 1． 2用水量計(jì)算 ..................................................................................................... 43 2 輸水管 與給水管網(wǎng)的設(shè)計(jì)計(jì)算： ............................................................................. 44 2． 1輸水管 ............................................................................................................ 44 2． 2給水管網(wǎng) ......................................................................................................... 44 3 給水系統(tǒng)的選擇和給水方案的比較 ......................................................................... 56 3． 1取水水源的選擇 .............................................................................................. 56 3． 2取水頭部的選擇 .............................................................................................. 56 3． 3水廠的廠址和凈水工藝的選擇 ......................................................................... 57 4 取水工程的設(shè)計(jì) ........................................................................................................ 57 4． 1取水頭部 ......................................................................................................... 57 4． 2取水泵房 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