輸配水工程中管網(wǎng)水力計(jì)算案例目錄TOC\o"1-3"\h\u100921.1管網(wǎng)定線 1324101.1.1給水管網(wǎng)布置原則 17061.1.2給水管網(wǎng)布置基本形式 1191751.1.3管網(wǎng)定線 2244611.2管網(wǎng)水力計(jì)算 3229211.2.1比流量計(jì)算 315961.2.2沿線流量 4104631.2.3節(jié)點(diǎn)流量 573441.2.4流量分配 6277131.2.5輸水管管徑與水頭損失 75001.2.6最不利點(diǎn)確定 9254271.2.7管網(wǎng)平差（最高時(shí)） 922401.2.8消防校核 12268921.2.9事故校核 22管網(wǎng)定線給水管網(wǎng)布置原則本次設(shè)計(jì)給水管網(wǎng)布置將嚴(yán)格遵循以下原則：3.1.1.1按照城市總體規(guī)劃，結(jié)合金東區(qū)實(shí)際情況布置給水管網(wǎng)，并進(jìn)行多方案技術(shù)經(jīng)濟(jì)比較，最終選擇性價(jià)比最高最合理的方案。3.1.1.2管線布置要充分考慮經(jīng)濟(jì)性與實(shí)用性，不可冗余過多。3.1.1.3給水管網(wǎng)供水的安全可靠性是供水最近本的原則。3.1.1.4盡量減少拆遷占地，盡量不要占用農(nóng)田。3.1.1.5管渠的施工、運(yùn)行和維護(hù)方便。給水管網(wǎng)布置基本形式3.1.2.1樹狀管網(wǎng)樹狀管網(wǎng)布置一般適用于小城市和小型工礦企業(yè)，管網(wǎng)從水廠泵站或水塔到用戶的管線布置呈樹枝狀。樹狀管網(wǎng)管線短，投資相對(duì)較小。但是樹狀管網(wǎng)的供水可靠性差，因?yàn)楣芫W(wǎng)中任意管線損壞時(shí)，在該管段后的所有管線就會(huì)斷水。此外，因樹狀管網(wǎng)末端用水量小，管中水流流速緩慢，甚至?xí)涣鳎灾劣谒|(zhì)容易變質(zhì)。3.1.2.2環(huán)狀管網(wǎng)環(huán)狀管網(wǎng)顧名思義將管網(wǎng)布置為環(huán)狀，除進(jìn)水口外沒有裸露的端口，全都是封閉的環(huán)狀。環(huán)狀管網(wǎng)管線長(zhǎng)，造價(jià)明顯比樹狀管網(wǎng)高。但是當(dāng)環(huán)狀管網(wǎng)中任意管線損壞時(shí)，可以通過關(guān)閉其附近閥門的方式，將其與其余管線斷開，不會(huì)影響其余管線供水能力，然后進(jìn)行檢修，可實(shí)現(xiàn)斷水區(qū)域縮小的功能，增加供水可靠性。環(huán)狀管網(wǎng)還可以大大減輕因水錘作用而產(chǎn)生的對(duì)于管道的危害，而在樹狀管網(wǎng)中，則往往因此而導(dǎo)致管網(wǎng)損壞。3.1.2.3設(shè)計(jì)管網(wǎng)考慮到供水可靠性與水質(zhì)安全性，本次管網(wǎng)布置形式采用環(huán)狀管網(wǎng)，且由于本次采用東陽江作為水源，水源低于給水區(qū)，采用泵站加壓輸水進(jìn)入環(huán)狀管網(wǎng)，并根據(jù)設(shè)計(jì)要求滿足居民水量要求、水質(zhì)要求、水壓要求。管網(wǎng)定線3.1.2.3管網(wǎng)布置要點(diǎn)干管的間距可根據(jù)街區(qū)的情況采用500－800m，除特殊情況，最長(zhǎng)計(jì)算管段不可超過1000m，從供水的可靠性來看，布置幾條平行干管為宜；為保證供水的可靠性，干管之間應(yīng)設(shè)置連接管，其作用在于當(dāng)局部管線損壞時(shí)可以通過它重新分配流量，連接管間距800－1000m；干管的定線應(yīng)盡量避免在高級(jí)路面或重要道路下通過，盡量減少穿越鐵路的次數(shù)，減少施工難度和施工造價(jià)，管線在道路下的平面位置標(biāo)高應(yīng)符合城鎮(zhèn)或街區(qū)地下管線綜合設(shè)計(jì)要求；為了保證給水管網(wǎng)的正常運(yùn)行以及消防和管網(wǎng)的維修管理工作，管網(wǎng)上必須安裝各種必要的附件，如閥門、消防栓、排氣閥和泄水閥等。閥門是控制水流、調(diào)節(jié)流量和水壓的重要設(shè)備，閥門的布置應(yīng)能滿足故障管段的切斷需要，其位置可結(jié)合連接管或重要支管的節(jié)點(diǎn)位置，消防栓易設(shè)在使用方便、明顯易見之處，如路口、道邊等位置。在干管的高處應(yīng)裝設(shè)排氣閥，在管線低處和兩閥門之間的低處，應(yīng)裝設(shè)泄水管。3.1.2.3輸水管定線輸水管定線應(yīng)遵守：與城鎮(zhèn)規(guī)劃相結(jié)合,尺量縮短管線長(zhǎng)度，減少拆遷、便于管渠施工和運(yùn)行維護(hù)，保證不間斷供水；選擇線路時(shí)，應(yīng)充分利用地形，盡量沿現(xiàn)有道路鋪設(shè)，最好能全部或部分采用重力輸水；重力流有暗管和明渠之分，本次設(shè)計(jì)采用暗管；輸水管線應(yīng)盡量避免穿越河谷、鐵路、公路、沼澤、巖層、工程地質(zhì)條件不好的地段，以利施工和降低工程造價(jià)；本次設(shè)計(jì)輸水管采用雙管輸水，確保輸水的可靠性，并在兩條輸水管間設(shè)置連通管，裝置必要的閥門,以事故時(shí)能保證70%的流量。3.1.2.3配水管定線配水管定線應(yīng)遵守：按照城市規(guī)劃布置，考慮分期建設(shè)可能，留有充分的發(fā)展余地；工業(yè)企業(yè)配水管網(wǎng)的形狀，應(yīng)根據(jù)廠區(qū)總圖布置和供水安全要求等因素確定；城鎮(zhèn)生活飲用水的管網(wǎng)，嚴(yán)禁與非生活飲用水的管網(wǎng)連接；城鎮(zhèn)生活飲用水管網(wǎng)，嚴(yán)禁與各單位自備的生活飲用水供水系統(tǒng)連接；管線遍布在整個(gè)給水區(qū)內(nèi)，管網(wǎng)中的干管應(yīng)以最近距離輸水到用戶和調(diào)節(jié)構(gòu)筑物，保證用戶有足夠的水量和水壓。本次設(shè)計(jì)配水管網(wǎng)設(shè)計(jì)成環(huán)狀配水管網(wǎng)。管網(wǎng)水力計(jì)算比流量計(jì)算本次設(shè)計(jì)假定用水量均勻分布在全部干管上，由此得出來的單位管線長(zhǎng)度上的流量叫做比流量，以qs表示。q式中：qs——按管端配水長(zhǎng)度分配沿線流量的比流量[L/(s·m)]；Q——管網(wǎng)總用水量L/s；∑q——大用戶集中用水量總和L/s；∑l——各管段沿線配水長(zhǎng)度總和m。本次設(shè)計(jì)中，管網(wǎng)總用水量按照最高日最高時(shí)用水量計(jì)算Qh=2888.54L/s，大用戶包括城市西北部的居民區(qū)、城市中部的商業(yè)區(qū)、城市東南部的工業(yè)區(qū)，其對(duì)應(yīng)集中流量分別為：居民區(qū)集中流量337.86L/s；商業(yè)區(qū)集中流量229.56L/s；工業(yè)區(qū)集中流量300.73L/s，總和為：∑q=式中：∑q——各管段沿線配水長(zhǎng)度總和L/s；229.56——商業(yè)區(qū)集中流量L/s；300.73——工業(yè)區(qū)集中流量L/s；337.86——居民區(qū)集中流量L/s。本次設(shè)計(jì)管網(wǎng)包括6個(gè)環(huán)，18段管段，其中給水管段（無配水長(zhǎng)度）有1段，單側(cè)供水管段2段，雙側(cè)供水管段15段，各管段配水長(zhǎng)度總和為：12169.94.05m。所以比流量qs為：q沿線流量運(yùn)用比流量求沿線流量公式如下：q式中：ql——按管端配水長(zhǎng)度分配的管段沿線流量L/s；qs——按管端配水長(zhǎng)度分配沿線流量的比流量[L/(s·m)]；l——各管段沿線配水長(zhǎng)度。根據(jù)此公式計(jì)算各管段沿線流量，計(jì)算結(jié)果詳見下表：表STYLEREF1\s3SEQ表\*ARABIC\s11沿線流量計(jì)算表管段編號(hào)管段長(zhǎng)度（m）配水長(zhǎng)度（有效長(zhǎng)度）管段流量（L/s）1-2521.260.00-2888.542-3990.00495.0082.183-4545.00545.0090.484-5740.00740.00122.855-6690.00690.00114.559-6962.81962.81159.847-4736.47736.47122.278-5889.05889.05147.602-7570.00570.0094.637-8900.00900.00149.418-9610.00610.00101.272-101080.00540.0089.6510-11660.00660.00109.5711-12660.00660.00109.5712-13565.00565.0093.807-11954.89954.89158.538-12808.07808.07134.159-13843.65843.65140.06節(jié)點(diǎn)流量為便于分析計(jì)算，本次設(shè)計(jì)規(guī)定所有流量只允許從節(jié)點(diǎn)處流出或流入，管段沿線不允許有流量進(jìn)出。集中流量直接加在所處節(jié)點(diǎn)，沿線流量取折算系數(shù)α=0.5轉(zhuǎn)移到管段兩段節(jié)點(diǎn)上，換言之任一節(jié)點(diǎn)i的節(jié)點(diǎn)流量等于與該點(diǎn)相連各管段的沿線流量總和的一半節(jié)點(diǎn)流量計(jì)算公式：q式中：α——折算系數(shù)：0.5；∑l——節(jié)點(diǎn)相鄰管段長(zhǎng)度m。表STYLEREF1\s3SEQ表\*ARABIC\s12節(jié)點(diǎn)流量計(jì)算表節(jié)點(diǎn)編號(hào)節(jié)點(diǎn)相連管段節(jié)點(diǎn)流量（L/s）集中流量（L/s）總結(jié)點(diǎn)流量（L/s）11-20.000.00-2888.5421-2，2-3,2-7,2-10133.230.00133.2332-3,3-486.330.0086.3343-4,4-5,4-7167.80337.86505.6654-5,5-6,5-8192.500.00192.5065-6,6-9137.200.00137.2072-7,4-7,7-8,7-11262.420.00262.4285-8,7-8,8-9,8-12266.22229.56495.7896-9,8-9,9-13200.580.00200.58102-10,10-1199.610.0099.61117-11,10-11,11-12188.830.00188.83128-12,11-12,12-13191.890.00191.89139-13,12-13116.93300.73417.66流量分配在管網(wǎng)設(shè)計(jì)中，為保證管道中水流的穩(wěn)定性與連續(xù)性，每個(gè)節(jié)點(diǎn)需要滿足流量平衡（流入節(jié)點(diǎn)流量需等于流出節(jié)點(diǎn)的流量）。本次設(shè)計(jì)規(guī)定流入節(jié)點(diǎn)流量為負(fù)，流出為正，根據(jù)此條件，流量平衡可表示為：q式中：qi——節(jié)點(diǎn)i的節(jié)點(diǎn)流量；圖STYLEREF1\s3SEQ圖\*ARABIC\s1圖STYLEREF1\s3SEQ圖\*ARABIC\s11管網(wǎng)流量分配圖輸水管管徑與水頭損失3.2.5.1干管管徑確定考慮到管網(wǎng)的經(jīng)濟(jì)與供水能力以及水利條件，本次設(shè)計(jì)管徑大小取決于流量與流速兩個(gè)方面，具體參照標(biāo)準(zhǔn)如下：管徑≤400時(shí)：管段流速在0.6m/s-0.9m/s；管徑>400時(shí)：管段流速在0.9m/s-1.4m/s。球墨鑄鐵管具有鐵的本質(zhì)、鋼的性能，防腐性能優(yōu)異、延展性能好，密封效果好，安裝簡(jiǎn)易，性價(jià)比高，所以本次給水管材質(zhì)采用球墨鑄鐵管。根據(jù)管段設(shè)計(jì)流量以及設(shè)計(jì)規(guī)范，通過查閱《給水排水設(shè)計(jì)手冊(cè)》得知各段給水管管徑如下表：表STYLEREF1\s3SEQ表\*ARABIC\s13干管管徑表管段編號(hào)管段流量（L/s）管內(nèi)流速（m/s）1000i管徑（mm）2-382.180.863.283503-490.480.7241.984004-5122.850.993.534005-6114.550.923.124009-6159.841.013.144507-4122.270.993.534008-5147.600.932.734502-794.630.762.164007-8149.410.942.804508-9101.270.812.464002-1089.650.721.9540010-11109.570.882.8340011-12109.570.882.8340012-1393.800.752.124007-11158.531.013.144508-12134.151.084.194009-13140.061.114.434003.2.5.2連接管管徑確定相比較干管而言，連接管管徑相對(duì)較小，為確保管網(wǎng)供水水壓要求，本次設(shè)計(jì)默認(rèn)為連接管管徑比相鄰干管管徑小1-2個(gè)型號(hào)。管網(wǎng)末端管徑可以適當(dāng)放大1-2號(hào)，這樣在消防時(shí)末端水頭損失不至于過大從而達(dá)不到規(guī)定要求。3.2.5.3水頭損失海曾-威廉公式適用于較光滑圓管滿管紊流計(jì)算，主用于給水管道水力計(jì)算，故本次設(shè)計(jì)水頭損失采用海曾-威廉公式：h=式中：h——管段水頭損失m；q——管段流量m3/s；Cw——海曾-威廉系數(shù)，本設(shè)計(jì)采用新鑄鐵管其值為130；D——管徑m；l——管長(zhǎng)m。最不利點(diǎn)確定水流在管網(wǎng)中流動(dòng)因?yàn)樽陨碜枇εc各種水利效應(yīng)造成水頭損失，且地勢(shì)越高的地方自由水壓越低，若想使得整個(gè)管網(wǎng)供水能力達(dá)到要求，就必須使得最不利點(diǎn)水頭達(dá)到規(guī)范要求，這樣全管網(wǎng)水壓也符合要求。為降低因地形而造成的水頭損失，二級(jí)泵站應(yīng)該盡量選在地形高的地方。本次設(shè)計(jì)平差前假定最不利點(diǎn)為13節(jié)點(diǎn)，因?yàn)樗粌H位于管網(wǎng)末端距離水源點(diǎn)較遠(yuǎn)，且含有工業(yè)區(qū)用水量較大，對(duì)于水壓要求較高。環(huán)狀管網(wǎng)通過平差可確認(rèn)最不利點(diǎn)，同時(shí)可以優(yōu)化供水調(diào)度，使得管網(wǎng)設(shè)計(jì)規(guī)劃更加合理。管網(wǎng)平差（最高時(shí)）3.2.7.1哈代克羅斯法平差計(jì)算本次設(shè)計(jì)采用哈代克羅斯法平差計(jì)算，要求閉合差需小于0.1。平差過程如下：表STYLEREF1\s34哈代克羅斯法平差表環(huán)號(hào)管段編號(hào)s初分配流量第一次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.3982.182.0925.3879.291.9524.623-461.3190.480.727.9287.590.677.70-7-482.84-122.27-1.6913.82-124.22-1.7414.01-2-764.12-94.63-0.818.60-95.49-0.838.670.3055.720.0655.00校正流量（L/s）-2.89校正流量（L/s）-0.5727-482.84122.271.6913.82124.221.7414.014-583.24122.851.7113.95121.911.6913.86-8-556.35-147.60-1.6311.04-148.65-1.6511.11-7-857.05-149.41-1.6911.29-143.49-1.5710.910.0950.110.2149.89校正流量（L/s）-0.94校正流量（L/s）-2.3138-556.35147.601.6311.04148.651.6511.115-677.62114.551.4012.25114.671.4112.26-9-661.03-159.84-2.0512.80-159.72-2.0412.79-8-968.62-101.27-0.999.75-96.19-0.909.33-0.0145.840.1245.49校正流量（L/s）0.12校正流量（L/s）-1.3942-764.1294.630.818.6095.490.838.677-1160.53158.532.0012.60163.362.1112.93-2-10121.49-89.65-1.4015.56-91.67-1.4515.86-10-1174.24-109.57-1.2411.28-111.59-1.2811.460.1848.050.2148.92校正流量（L/s）-2.02校正流量（L/s）-2.2857-857.05149.411.6911.29143.491.5710.918-1290.90134.152.2016.42132.262.1516.22-7-1160.53-158.53-2.0012.60-163.36-2.1112.93-11-1274.24-109.57-1.2411.28-116.43-1.3811.880.6651.600.2151.94校正流量（L/s）-6.86校正流量（L/s）-2.2368-968.62101.270.999.7596.190.909.339-1394.90140.062.4917.78135.092.3317.24-8-1290.90-134.15-2.2016.42-132.26-2.1516.22-12-1363.56-93.80-0.798.46-98.77-0.878.840.4852.410.2151.64校正流量（L/s）-4.97校正流量（L/s）-2.18環(huán)號(hào)管段編號(hào)s第二次平差第三次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.3978.721.9324.4777.771.8824.223-461.3187.020.677.6686.070.657.59-7-482.84-122.49-1.7013.85-122.47-1.7013.84-2-764.12-93.79-0.808.54-94.06-0.808.560.1054.510.0454.20校正流量（L/s）-0.95校正流量（L/s）-0.3627-482.84122.491.7013.85122.471.7013.844-583.24119.611.6313.63118.631.6113.54-8-556.35-149.57-1.6711.17-149.53-1.6711.16-7-857.05-143.56-1.5710.92-142.81-1.5510.870.0949.560.0849.41校正流量（L/s）-0.97校正流量（L/s）-0.8838-556.35149.571.6711.17149.531.6711.165-677.62113.281.3712.14112.271.3512.04-9-661.03-161.11-2.0812.88-162.12-2.1012.95-8-968.62-95.39-0.889.27-95.45-0.899.270.0945.450.0445.43校正流量（L/s）-1.01校正流量（L/s）-0.4342-764.1293.790.808.5494.060.808.567-1160.53163.322.1112.93164.362.1413.00-2-10121.49-93.95-1.5216.20-94.63-1.5416.30-10-1174.24-113.87-1.3311.66-114.55-1.3411.720.0649.320.0649.57校正流量（L/s）-0.68校正流量（L/s）-0.6157-857.05143.561.5710.92142.811.5510.878-1290.90132.212.1416.21131.442.1216.13-7-1160.53-163.32-2.1112.93-164.36-2.1413.00-11-1274.24-118.66-1.4312.08-120.39-1.4712.230.1752.130.0652.22校正流量（L/s）-1.72校正流量（L/s）-0.6768-968.6295.390.889.2795.450.899.279-1394.90132.912.2617.00131.952.2316.90-8-1290.90-132.21-2.1416.21-131.44-2.1216.13-12-1363.56-100.95-0.919.01-101.91-0.939.080.0951.490.0751.39校正流量（L/s）-0.96校正流量（L/s）-0.73經(jīng)過三次平差后，各環(huán)的閉合差均小于0.1，符合平差要求，接下來對(duì)管網(wǎng)進(jìn)行水力分析并反算水源壓力。3.2.7.2管段水力計(jì)算經(jīng)平差后對(duì)管道內(nèi)流量進(jìn)行了優(yōu)化分配，在知道管徑的情況下可計(jì)算出管內(nèi)流速v：v=(q/1000)/（式中：v——管段流速m/s；q——管段流量L/s；D——管徑m。結(jié)合平差數(shù)據(jù)，可得如下管段水力計(jì)算表：表STYLEREF1\s35管段水力計(jì)算表管段編號(hào)2-33-42-77-44-58-57-88-95-6管段流量（L/s）77.7786.0794.06122.47118.63149.53142.8195.45112.27管內(nèi)流速（m/s）0.810.690.750.980.940.940.900.760.89管段壓降（m）1.880.650.801.701.611.671.550.891.35表STYLEREF1\s35管段水力計(jì)算表（續(xù)）管段編號(hào)9-62-1010-117-1111-128-1212-139-13管段流量（L/s）162.1294.63114.55164.36120.39131.44101.91131.95管內(nèi)流速（m/s）1.020.750.911.030.961.050.811.05管段壓降（m）2.101.541.342.141.472.120.932.233.2.7.3節(jié)點(diǎn)水力計(jì)算通過平差計(jì)算可得各管段壓降，結(jié)合各節(jié)點(diǎn)地面標(biāo)高，可得各節(jié)點(diǎn)自由水壓，從而得出水源節(jié)點(diǎn)壓力。節(jié)點(diǎn)水力計(jì)算表如下：表STYLEREF1\s36節(jié)點(diǎn)水力計(jì)算表節(jié)點(diǎn)編號(hào)1234567節(jié)點(diǎn)水頭（m）30.3129.4727.7427.0925.4824.1328.67地面標(biāo)高（m）14.2114.5515.6313.7515.9714.1113.74自由水壓（m）16.1014.9212.1113.349.5110.0214.93節(jié)點(diǎn)編號(hào)8910111213節(jié)點(diǎn)水頭（m）27.1226.2327.7426.4024.9324.00地面標(biāo)高（m）14.7312.4915.6314.9212.6414.91自由水壓（m）12.3913.7412.1111.4812.299.09綜上可得：最不利點(diǎn)為13節(jié)點(diǎn)，且當(dāng)其節(jié)點(diǎn)水頭滿足24m時(shí)，整個(gè)管網(wǎng)符合供水壓力要求，水源節(jié)點(diǎn)水壓為30.31m。消防校核為保證管網(wǎng)供水可靠性以及在火災(zāi)發(fā)生時(shí)各個(gè)節(jié)點(diǎn)的用戶用水滿足，本次設(shè)計(jì)以最高時(shí)用水量為基礎(chǔ)，在最不利點(diǎn)與居民區(qū)集中用水點(diǎn)附加消防集中流量進(jìn)行消防校核，因消防時(shí)通過各管段流量會(huì)增大，會(huì)導(dǎo)致各管段壓降相對(duì)增加，此時(shí)可適當(dāng)放大個(gè)別管管徑。根據(jù)規(guī)范，本次設(shè)計(jì)同時(shí)火災(zāi)發(fā)生次數(shù)為2次，一次滅火用水量為65L/s，分別附加在最不利點(diǎn)13節(jié)點(diǎn)與居民區(qū)集中節(jié)點(diǎn)4節(jié)點(diǎn)上進(jìn)行消防校核。3.2.8.1消防初分配節(jié)點(diǎn)流量表STYLEREF1\s37消防初分配節(jié)點(diǎn)流量表節(jié)點(diǎn)編號(hào)平差后節(jié)點(diǎn)流量（L/s）集中流量（L/s）消防流量（L/s）節(jié)點(diǎn)總流量（L/s）2133.230.00133.23381.920.0081.924163.59337.8665.00566.455190.220.00190.226137.200.00137.207261.850.00261.858259.62229.56489.189194.760.00194.7610104.590.00104.5911199.650.00199.6512176.870.00176.8713116.93300.7365.00482.663.2.8.2消防初分配管段流量表STYLEREF1\s38消防管段流量表管段編號(hào)管徑（mm）管段流量（L/s）2-3350528.863-4400446.944-5400163.715-640068.609-645068.607-4400446.948-5450163.712-7400577.867-8450835.458-9400407.312-10400534.1810-11400429.5911-12400329.7712-13400241.337-11450429.598-12400329.779-13400241.333.2.8.3消防校核本次消防校核平差公式采用哈代克羅斯平差公式，平差后滅火節(jié)點(diǎn)自由水壓均大于10m消防水頭則視為滿足消防校核。表STYLEREF1\s39消防校核平差表環(huán)號(hào)管段編號(hào)s初分配流量第一次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39528.8665.58124.01443.3047.30106.703-461.31446.9413.8030.87361.389.3125.76-7-482.84-446.94-18.6441.71-627.93-34.9955.73-2-764.12-577.86-23.2240.18-717.36-34.6648.3137.51236.77-13.05236.50校正流量（L/s）-85.55校正流量（L/s）29.7827-482.84446.9418.6441.71627.9334.9955.734-583.24163.712.9217.81259.166.8326.35-8-556.35-163.71-1.9712.0668.35-0.395.73-7-857.05-835.45-40.8948.95625.00-23.8938.22-21.31120.5317.54126.03校正流量（L/s）95.45校正流量（L/s）-75.1538-556.35163.711.9712.0668.350.395.735-677.6268.600.547.9268.690.547.93-9-661.03-68.60-0.436.22-68.51-0.436.22-8-968.62-407.31-13.0031.92-390.20-12.0130.78-0.0158.12-11.5050.65校正流量（L/s）0.09校正流量（L/s）122.5942-764.12577.8623.2240.18717.3634.6648.317-1160.53429.5912.6629.47598.5423.4039.09-2-10121.49-534.18-38.0471.21-480.23-31.2365.03-10-1174.24-429.59-15.5336.14-375.64-12.1132.24-17.68177.0014.71184.67校正流量（L/s）53.95校正流量（L/s）-43.0257-857.05835.4540.8948.95625.0023.8938.228-1290.90329.7711.6535.32231.786.0626.16-7-1160.53-429.59-12.6629.47-598.54-23.4039.09-11-1274.24-329.77-9.5128.85-444.76-16.5637.2330.37142.59-10.00140.70校正流量（L/s）-115.00校正流量（L/s）38.3868-968.62407.3113.0031.92390.2012.0130.789-1394.90241.336.8228.27224.315.9626.56-8-1290.90-329.77-11.6535.32-231.78-6.0626.16-12-1363.56-241.33-4.5718.93-258.35-5.1820.063.61114.446.72103.55校正流量（L/s）-17.02校正流量（L/s）-35.04環(huán)號(hào)管段編號(hào)s第二次平差第三次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39473.0953.35112.78448.0548.24107.673-461.31391.1710.7827.55366.139.5426.05-7-482.84-523.00-24.9447.69-584.82-30.6852.45-2-764.12-644.56-28.4344.10-684.67-31.7946.4310.76232.12-4.69232.60校正流量（L/s）-25.04校正流量（L/s）10.8827-482.84523.0024.9447.69584.8230.6852.454-583.24184.013.6219.68220.795.0722.98-8-556.35-266.09-4.8518.24-221.59-3.4615.61-7-857.05-738.53-32.5444.06-661.91-26.5740.14-8.83129.675.72131.18校正流量（L/s）36.79校正流量（L/s）-23.5638-556.35266.094.8518.24221.593.4615.615-677.62191.283.6318.96183.563.3618.31-9-661.03-191.09-2.8514.90-198.82-3.0615.41-8-968.62-232.57-4.6119.80-282.61-6.6123.381.0371.91-2.8572.71校正流量（L/s）-7.72校正流量（L/s）21.1842-764.12644.5628.4344.10684.6731.7946.437-1160.53517.1417.8534.51572.0621.5137.61-2-10121.49-523.25-36.6169.96-508.17-34.6868.24-10-1174.24-418.66-14.8035.36-403.58-13.8334.27-5.14183.934.80186.55校正流量（L/s）15.08校正流量（L/s）-13.8857-857.05738.5332.5444.06661.9126.5740.148-1290.90305.2010.0933.07223.055.6525.32-7-1160.53-517.14-17.8534.51-572.06-21.5137.61-11-1274.24-406.39-14.0134.47-446.22-16.6637.3310.78146.12-5.96140.39校正流量（L/s）-39.84校正流量（L/s）22.9268-968.62232.574.6119.80282.616.6123.389-1394.90189.274.3522.98231.596.3227.29-8-1290.90-305.20-10.0933.07-223.05-5.6525.32-12-1363.56-293.39-6.5622.36-251.07-4.9219.58-7.7098.212.3795.57校正流量（L/s）42.32校正流量（L/s）-13.37環(huán)號(hào)管段編號(hào)s第四次平差第五次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39458.9350.43109.89451.0148.83108.283-461.31377.0110.0726.70369.099.6826.22-7-482.84-550.38-27.4149.81-572.49-29.4951.51-2-764.12-659.91-29.6945.00-674.99-30.9645.873.39231.40-1.94231.88校正流量（L/s）-7.92校正流量（L/s）4.5127-482.84550.3827.4149.81572.4929.4951.514-583.24197.234.1220.88211.434.6822.15-8-556.35-266.33-4.8618.25-242.56-4.0916.86-7-857.05-708.38-30.1342.53-681.08-28.0141.13-3.46131.472.07131.64校正流量（L/s）14.15校正流量（L/s）-8.5038-556.35266.334.8618.25242.564.0916.865-677.62204.744.1120.10195.173.7719.29-9-661.03-177.64-2.4914.00-187.21-2.7414.64-8-968.62-248.07-5.1920.92-269.01-6.0322.421.3073.27-0.9273.21校正流量（L/s）-9.57校正流量（L/s）6.7742-764.12659.9129.6945.00674.9930.9645.877-1160.53535.2619.0235.54555.5320.3836.68-2-10121.49-522.05-36.4569.83-514.89-35.5369.01-10-1174.24-417.46-14.7235.27-410.30-14.2634.75-2.46185.631.55186.32校正流量（L/s）7.16校正流量（L/s）-4.4857-857.05708.3830.1342.53681.0828.0141.138-1290.90259.337.4628.78234.856.2126.45-7-1160.53-535.26-19.0235.54-555.53-20.3836.68-11-1274.24-423.31-15.1135.69-436.41-15.9936.633.46142.54-2.14140.89校正流量（L/s）-13.11校正流量（L/s）8.2068-968.62248.075.1920.92269.016.0322.429-1394.90218.225.6625.94229.606.2227.09-8-1290.90-259.33-7.4628.78-234.85-6.2126.45-12-1363.56-264.44-5.4120.46-253.06-4.9919.71-2.0296.111.0595.67校正流量（L/s）11.37校正流量（L/s）-5.93環(huán)號(hào)管段編號(hào)s第六次平差第七次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39455.5349.74109.20452.7749.19108.643-461.31373.619.9026.50370.859.7626.33-7-482.84-559.48-28.2650.51-567.46-29.0151.12-2-764.12-665.99-30.2045.35-671.45-30.6645.671.18231.56-0.72231.76校正流量（L/s）-2.75校正流量（L/s）1.6827-482.84559.4828.2650.51567.4629.0151.124-583.24202.934.3421.39208.154.5521.86-8-556.35-257.83-4.5817.76-248.81-4.2917.23-7-857.05-697.78-29.3041.98-687.76-28.5241.47-1.27131.640.75131.68校正流量（L/s）5.23校正流量（L/s）-3.0938-556.35257.834.5817.76248.814.2917.235-677.62201.934.0119.86198.153.8719.54-9-661.03-180.44-2.5614.19-184.23-2.6614.44-8-968.62-256.32-5.5121.51-263.98-5.8222.060.5173.32-0.3373.27校正流量（L/s）-3.79校正流量（L/s）2.4042-764.12665.9930.2045.35671.4530.6645.677-1160.53542.8419.5235.97550.3420.0336.39-2-10121.49-519.38-36.1169.52-516.67-35.7669.21-10-1174.24-414.79-14.5535.08-412.08-14.3734.88-0.93185.920.55186.15校正流量（L/s）2.70校正流量（L/s）-1.6157-857.05697.7829.3041.98687.7628.5241.478-1290.90248.986.9227.80240.306.4826.98-7-1160.53-542.84-19.5235.97-550.34-20.0336.39-11-1274.24-428.21-15.4336.04-433.01-15.7636.391.26141.80-0.78141.22校正流量（L/s）-4.80校正流量（L/s）2.9868-968.62256.325.5121.51263.985.8222.069-1394.90223.675.9326.49227.556.1226.88-8-1290.90-248.98-6.9227.80-240.30-6.4826.98-12-1363.56-258.99-5.2120.10-255.11-5.0619.85-0.6995.910.4095.77校正流量（L/s）3.88校正流量（L/s）-2.23環(huán)號(hào)管段編號(hào)s第八次平差第九次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39454.4549.53108.98453.4649.33108.783-461.31372.539.8526.43371.549.8026.37-7-482.84-562.69-28.5650.76-565.60-28.8350.98-2-764.12-668.16-30.3945.48-670.15-30.5545.590.43231.65-0.26231.72校正流量（L/s）-0.99校正流量（L/s）0.6127-482.84562.6928.5650.76565.6028.8350.984-583.24205.074.4321.58206.984.5021.75-8-556.35-254.30-4.4617.55-250.99-4.3617.36-7-857.05-693.82-28.9941.78-690.16-28.7141.59-0.47131.670.27131.68校正流量（L/s）1.91校正流量（L/s）-1.1238-556.35254.304.4617.55250.994.3617.365-677.62200.553.9619.74199.153.9119.63-9-661.03-181.83-2.6014.28-183.23-2.6314.37-8-968.62-259.35-5.6421.73-262.15-5.7521.930.1973.31-0.1273.29校正流量（L/s）-1.40校正流量（L/s）0.8742-764.12668.1630.3945.48670.1530.5545.597-1160.53545.7619.7236.13548.5019.9036.29-2-10121.49-518.28-35.9769.40-517.29-35.8469.28-10-1174.24-413.69-14.4835.00-412.70-14.4134.93-0.34186.000.20186.09校正流量（L/s）0.99校正流量（L/s）-0.5857-857.05693.8228.9941.78690.1628.7141.598-1290.90245.516.7427.47242.376.5927.17-7-1160.53-545.76-19.7236.13-548.50-19.9036.29-11-1274.24-430.03-15.5636.17-431.78-15.6736.300.46141.56-0.28141.35校正流量（L/s）-1.75校正流量（L/s）1.0968-968.62259.355.6421.73262.155.7521.939-1394.90225.326.0126.66226.716.0826.80-8-1290.90-245.51-6.7427.47-242.37-6.5927.17-12-1363.56-257.34-5.1519.99-255.95-5.0919.90-0.2595.860.1595.80校正流量（L/s）1.40校正流量（L/s）-0.82環(huán)號(hào)管段編號(hào)s第十次平差第十一次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39454.0749.45108.90453.7149.38108.833-461.31372.159.8326.41371.799.8126.39-7-482.84-563.86-28.6750.85-564.92-28.7750.93-2-764.12-668.95-30.4545.52-669.68-30.5145.560.16231.68-0.10231.71校正流量（L/s）-0.36校正流量（L/s）0.2227-482.84563.8628.6750.85564.9228.7750.934-583.24205.854.4621.65206.554.4821.71-8-556.35-252.99-4.4217.47-251.78-4.3817.40-7-857.05-692.37-28.8841.71-691.04-28.7741.64-0.17131.680.10131.68校正流量（L/s）0.70校正流量（L/s）-0.4138-556.35252.994.4217.47251.784.3817.405-677.62200.023.9419.70199.513.9219.66-9-661.03-182.36-2.6114.32-182.87-2.6214.35-8-968.62-260.46-5.6821.81-261.48-5.7221.880.0773.30-0.0473.29校正流量（L/s）-0.51校正流量（L/s）0.3242-764.12668.9530.4545.52669.6830.5145.567-1160.53546.8319.7936.19547.8319.8636.25-2-10121.49-517.87-35.9169.35-517.51-35.8769.31-10-1174.24-413.28-14.4534.97-412.92-14.4334.94-0.12186.030.07186.06校正流量（L/s）0.36校正流量（L/s）-0.2157-857.05692.3728.8841.71691.0428.7741.648-1290.90244.276.6827.35243.126.6227.24-7-1160.53-546.83-19.7936.19-547.83-19.8636.25-11-1274.24-430.70-15.6036.22-431.34-15.6436.270.17141.47-0.10141.40校正流量（L/s）-0.64校正流量（L/s）0.4068-968.62260.465.6821.81261.485.7221.889-1394.90225.896.0426.72226.406.0626.77-8-1290.90-244.27-6.6827.35-243.12-6.6227.24-12-1363.56-256.77-5.1219.96-256.26-5.1119.92-0.0995.840.0595.82校正流量（L/s）0.51校正流量（L/s）-0.30環(huán)號(hào)管段編號(hào)s第十二次平差q（L/s）h（m）s|q|0.85212-3213.39453.9349.42108.873-461.31372.019.8226.40-7-482.84-564.28-28.7150.88-2-764.12-669.24-30.4845.540.06231.69校正流量（L/s）-0.1327-482.84564.2828.7150.884-583.24206.144.4721.68-8-556.35-252.50-4.4017.44-7-857.05-691.84-28.8441.68-0.06131.68校正流量（L/s）0.2538-556.35252.504.4017.445-677.62199.823.9319.68-9-661.03-182.55-2.6214.33-8-968.62-260.86-5.7021.840.0373.30校正流量（L/s）-0.1942-764.12669.2430.4845.547-1160.53547.2219.8236.21-2-10121.49-517.72-35.9069.33-10-1174.24-413.13-14.4434.96-0.05186.04校正流量（L/s）0.1357-857.05691.8428.8441.688-1290.90243.826.6627.31-7-1160.53-547.22-19.8236.21-11-1274.24-430.94-15.6236.240.06141.44校正流量（L/s）-0.2368-968.62260.865.7021.849-1394.90226.106.0526.74-8-1290.90-243.82-6.6627.31-12-1363.56-256.56-5.1219.94-0.0395.83校正流量（L/s）0.183.2.8.4消防管段水力計(jì)算表STYLEREF1\s310消防管段水力計(jì)算表管段編號(hào)2-33-42-77-44-58-57-88-95-6管段流量（L/s）453.93372.01669.24564.28206.14252.50691.84260.86199.82管段壓降（m）49.929.8230.4828.714.474.4028.845.703.93管段編號(hào)9-62-1010-117-1111-128-1212-139-13管段流量（L/s）182.55517.72413.13547.22430.94243.82256.56226.10管段壓降（m）2.6235.9014.4419.8215.626.665.126.053.2.8.5消防節(jié)點(diǎn)水力計(jì)算表STYLEREF1\s3SEQ表\*ARABIC\s111消防節(jié)點(diǎn)水力計(jì)算表節(jié)點(diǎn)編號(hào)1234567節(jié)點(diǎn)水頭（m）30.5329.4728.6528.0026.3925.0429.58地面標(biāo)高（m）14.2114.5515.6313.7515.9714.1113.74自由水壓（m）16.3214.9213.0214.2510.4210.9315.84節(jié)點(diǎn)編號(hào)8910111213節(jié)點(diǎn)水頭（m）28.0327.1428.6527.3125.8424.91地面標(biāo)高（m）14.7312.4915.6314.9212.6414.91自由水壓（m）13.3014.6513.0212.3913.2010.00根據(jù)消防校核相關(guān)水力計(jì)算表可知，在著火節(jié)點(diǎn)4與著火節(jié)點(diǎn)13自由水壓均滿足10m，所以該設(shè)計(jì)消防校核滿足要求。事故校核為應(yīng)對(duì)在管網(wǎng)出現(xiàn)故障時(shí)保證供水力度與管網(wǎng)供水可靠性，現(xiàn)對(duì)本次設(shè)計(jì)管網(wǎng)進(jìn)行事故校核，擬定切斷一條最不利管段，其余節(jié)點(diǎn)流量按照最高時(shí)70%計(jì)算，若校核結(jié)果各節(jié)點(diǎn)自由水壓均滿足24m則事故校核成功。現(xiàn)擬定切斷管段2-10，校核過程如下。3.2.9.1事故初分配節(jié)點(diǎn)流量表STYLEREF1\s3SEQ表\*ARABIC\s112事故初分配流量表節(jié)點(diǎn)編號(hào)事故后節(jié)點(diǎn)流量（L/s）集中流量（L/s）節(jié)點(diǎn)總流量（L/s）293.260.0093.26357.340.0057.344114.51337.86452.375133.150.00133.15696.040.0096.047183.300.00183.308181.73229.56411.299136.330.00136.331073.210.0073.2111139.760.00139.7612123.810.00123.811381.85300.73382.583.2.9.2事故初分配管段流量表STYLEREF1\s3SEQ表\*ARABIC\s113事故管段流量表管段編號(hào)管徑（mm）管段流量（L/s）2-3350398.133-4400340.784-5400114.605-640048.029-645048788-5450114.602-7400432.437-8450641.618-9400307.482-10400—10-11400—11-12400253.2012-13400191.297-11450323209-13400191.293.2.9.3事故平差表STYLEREF1\s3SEQ表\*ARABIC\s114事故校核平差表環(huán)號(hào)管段編號(hào)s初分配流量第一次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39398.1338.7697.36333.6527.9483.753-461.31340.788.3524.50276.305.6620.49-7-482.84-340.78-11.2833.11-481.52-21.4044.45-2-764.12-432.43-13.5731.39-496.91-17.5635.3422.25186.36-5.36184.03校正流量（L/s）-64.48校正流量（L/s）15.7127-482.84340.7811.2833.11481.5221.4044.454-583.24114.601.5113.14190.853.8720.30-8-556.35-114.60-1.028.90-38.46-0.143.51-7-857.05-641.61-25.0839.09-475.30-14.3930.27-13.3194.2410.7598.53校正流量（L/s）76.26校正流量（L/s）-58.9438-556.35114.601.028.9038.460.143.515-677.6248.020.285.8448.140.285.85-9-661.03-48.02-0.224.59-47.90-0.224.58-8-968.62-307.48-7.7225.12-295.34-7.1724.27-0.0144.46-6.9738.22校正流量（L/s）0.12校正流量（L/s）98.4957-857.05641.6125.0839.09475.3014.3930.278-1290.90253.207.1428.20175.163.6120.60-7-1160.53-323.07-7.4723.11-413.13-11.7728.50-11-1274.24-253.20-5.8323.04-343.25-10.2529.8518.92113.44-4.03109.23校正流量（L/s）-90.05校正流量（L/s）19.908-968.62307.487.7225.12295.347.1724.279-1394.90191.294.4423.19179.273.9321.94-8-1290.90-253.20-7.1428.20175.16-3.6120.60-12-1363.56-191.29-2.9715.53203.31-3.3316.362.0592.044.1783.18校正流量（L/s）-12.02校正流量（L/s）-27.06環(huán)號(hào)管段編號(hào)s第二次平差第三次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39349.3630.4387.10335.9928.3184.263-461.31292.026.2721.48278.655.7520.64-7-482.84-406.87-15.6738.51-442.75-18.3241.38-2-764.12-481.20-16.5434.38494.56-17.4135.194.49181.47-1.67181.47校正流量（L/s）-13.37校正流量（L/s）4.9627-482.84406.8715.6738.51442.7518.3241.384-583.24131.911.9514.82154.432.6216.95-8-556.35-195.89-2.7514.05-167.04-2.0512.27-7-857.05-554.13-19.1234.50-509.16-16.3432.10-4.25101.872.55102.69校正流量（L/s）22.51校正流量（L/s）-13.3938-556.35195.892.7514.05167.042.0512.275-677.62146.632.2215.12140.292.0414.56-9-661.03-146.39-1.7411.87-140.05-1.6011.43-8-968.62-169.79-2.5715.15-206.15-3.6817.870.6656.19-1.1956.13校正流量（L/s）-6.34校正流量（L/s）11.4857-857.05554.1319.1234.50509.1616.3432.108-1290.90222.115.6025.23169.643.4020.05-7-1160.53-393.23-10.7527.33-415.68-11.9128.65-11-1274.24-323.35-9.1728.37-345.80-10.3930.044.80115.42-2.55110.84校正流量（L/s）-22.45校正流量（L/s）12.4468-968.62169.792.5715.15206.153.6817.879-1394.90152.222.9119.09182.244.0522.25-8-1290.90-222.11-5.6025.23-169.64-3.4020.05-12-1363.56-230.37-4.1918.19-200.35-3.2416.15-4.3277.651.1076.32校正流量（L/s）30.02校正流量（L/s）-7.79環(huán)號(hào)管段編號(hào)s第四次平差第五次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39340.9529.0985.31337.9528.6284.673-461.31283.615.9420.95280.615.8320.76-7-482.84-424.41-16.9439.91-434.80-17.7240.75-2-764.12-489.61-17.0834.89-492.61-17.2835.071.01181.07-0.55181.26校正流量（L/s）-3.00校正流量（L/s）1.6527-482.84424.4116.9439.91434.8017.7240.754-583.24141.042.2115.69148.432.4316.39-8-556.35-191.90-2.6513.81-183.69-2.4413.30-7-857.05-534.99-17.9133.48-522.15-17.1232.79-1.41102.890.58103.23校正流量（L/s）7.39校正流量（L/s）-3.0438-556.35191.902.6513.81183.692.4413.305-677.62151.772.3615.57150.952.3415.50-9-661.03-151.52-1.8512.23-150.70-1.8312.17-8-968.62-186.89-3.0716.44-193.71-3.2816.950.0958.04-0.3357.92校正流量（L/s）-0.82校正流量（L/s）3.1157-857.05534.9917.9133.48522.1517.1232.798-1290.90189.874.1922.07178.413.7320.93-7-1160.53-403.24-11.2627.92-408.69-11.5428.24-11-1274.24-333.36-9.7129.12-338.82-10.0029.521.14112.59-0.69111.49校正流量（L/s）-5.45校正流量（L/s）3.3368-968.62186.893.0716.44193.713.2816.959-1394.90174.453.7421.44180.453.9822.06-8-1290.90-189.87-4.1922.07-178.41-3.7320.93-12-1363.56-208.13-3.4716.69-202.13-3.2916.28-0.8576.630.2476.22校正流量（L/s）6.00校正流量（L/s）-1.70環(huán)號(hào)管段編號(hào)s第六次平差第七次平差q（L/s）h（m）s|q|0.852q（L/s）h（m）s|q|0.85212-3213.39339.6028.8785.02338.9228.7784.883-461.31282.255.8920.87281.575.8620.82-7-482.84-430.11-17.3640.37-432.90-17.5740.59-2-764.12-490.96-17.1734.97-491.64-17.2235.020.2