水力计算参考

8.5.2管网水力计算根据水量预测的计算，按规模10000m3/d计算。日变化系数取1.3时变化系数连界镇取1.4村庄取2.51、 计算简化原则在管网计算中，由于给水管线遍布在街道下，不但管线很多并且管径差别很大，如果将全部管线一律加以计算，实际上没有必要，甚至不太可能。因此，管网的水力计算往往将实际管线适当加以简化，保留主要的干管，略去一些次要的、水力条件影响较小的管线。具体简化有以下2点：A、 对于同条道路布置多条管段或平行且靠近的管线采用复合管径加以计算；B、 小范围内的多条管线交叉点简化为一个节点。2、 计算前的基本资料水源点确定：连界水厂重力供水水力计算时采用单水源进行水力计算。最高时用水量的确定：根据用水量预测，计算得出远期最高日用水量为10000m3/d，秒流量为231.48L/s，时变化系数取1.4，则最高时用水量为324.07L/s。控制点的确定：连界水厂清水池供水压力为685.45m，结合规划的水压覆盖范围，确定控制点为水源点。各节点高程及各管段长度由已知地形图上获取。3、 水力计算过程按支状管网节点流量计算为管段流量。4、 平差公式水头损失计算采用的是海曾-威廉公式：I10.67q1.852lh C1.852D4.87式中q 流量（m3/s）l 管道长度（m）C——系数，塑料管系数C（海曾-威廉系数）取140，铸铁管取130D——管径（m）计算结果详附表。根据计算结果，千鸡山水厂清水池重力供水能覆盖100%用户，无需二次加压。

5、结算结果最不利点水力计算节点参数表节点编号流量(L/s)地面标高(m)节点水压(m)自由水头(m)1-324.070685.450685.500水源212.483590.000684.44594.445313.443627.300677.26949.96949.406630.500670.10739.607521.943619.500667.92748.42765.063621.800679.11257.31277.204606.300680.67174.37187.250600.000678.66878.668912.779597.000673.88176.8811010.048618.000665.80747.8071137.518616.000664.46148.461122.375587.800681.93094.130131.272586.000682.80696.806140.595585.000683.11698.116152.186585.300683.37498.0741612.611602.000681.91179.911177.142588.000680.60992.6091810.888608.300678.21169.911194.778615.000674.18159.181202.871624.000671.57947.579213.778625.500670.89045.390224.445618.000670.17852.178236.814630.500668.99938.499248.479620.500666.16545.6652536.594617.000660.71543.715267.056621.500668.39546.895275.240609.500669.36459.864286.944618.500672.40853.908298.233625.900673.16247.2623012.708610.500677.29466.794314.052623.500673.53750.037327.183625.400674.70049.300335.134600.800677.00576.205348.398618.200673.31555.115352.411616.500674.22857.728363.052614.000676.16962.169376.933605.500670.67865.178384.761628.000670.63042.630

最不利点水力计算管道参数表管道编号管径(mm)管长(m)流量(L/s)流速(m/s)T米损失(m)管道损失(m)2-15355435.20094.6420.9562.4611900324.0701.3162.580150036.4401.1607.0187.1764-32001347.00031.3490.9985.3177.1625-4200788.40021.9430.6982.7652.1806-3160682.3008.3520.5432.7011.8437-6160467.10013.4150.6673.3381.5598-7315843.90067.5950.8672.374290060.3451.2295.9704.78710-92502099.20047.5660.9693.8468.07411-10200181.80037.5181.1947.4061.34712-7315324.40088.2141.1323.8801.25913-12315214.90090.5891.1624.0760.87614-1331574.00091.8611.1794.1820.31015-1431561.10092.4561.1864.2330.25916-2400558.400180.5051.4364.5372.53416-17400532.600129.4071.0302.4461.30317-184001088.700122.2650.9732.2022.39718-19200589.60035.9261.1446.8364.03118-33225459.90029.1770.7342.6231.20618-36225333.50046.2731.1646.1252.04319-20200495.10031.1480.9915.2552.60220-21200156.70028.2770.9004.3990.68921-38160417.8003.6780.2390.6210.25921-22200283.20020.8210.6632.5130.71222-23200726.10016.3760.5211.6241.17923-24160820.9009.5620.6213.4522.83424-26200333.30035.5111.1306.6912.23025-24200770.50036.5941.1657.0735.45026-37200527.40028.0330.8924.3292.28326-27200741.00014.5330.4631.3080.96927-28160448.50019.7730.9836.7873.04428-29200277.20021.7370.6922.7180.75329-302001112.90025.7790.8213.7134.13230-162501771.80038.4870.7842.6064.61831-29160479.0004.1900.2720.7830.37532-31160440.9008.2420.5352.6381.16332-34160484.3008.6170.5602.8591.385

33-32200705.50024.0430.7653.2682.30534-28160850.8004.9810.3241.0660.90735-34225188.00040.8101.0264.8570.91336-35225359.40043.2211.0875.3991.94037-34200383.30036.0491.1476.8792.63738-37160663.1001.0830.0700.0730.048消防校核节点参数表节点编号流量(L/s)地面标高(m)节点水压(m)自由水头(m)1-374.070685.450685.500水源212.483590.000684.12194.121313.443627.300669.59142.29149.406630.500648.34517.845546.943619.500639.49719.99765.063621.800675.97854.17877.204606.300679.69873.39887.250600.000677.69577.695912.779597.000672.90875.9081010.048618.000664.83446.8341137.518616.000663.48747.487122.375587.800681.18193.381131.272586.000682.20996.209140.595585.000682.57197.571152.186585.300682.87497.5741612.611602.000680.89378.893177.142588.000679.19791.1971810.888608.300676.03167.731194.778615.000670.36455.364202.871624.000666.53442.534213.778625.500665.48339.983224.445618.000664.37146.371236.814630.500662.33031.830248.479620.500655.62335.1232561.594617.000641.26924.269267.056621.500660.60439.104275.240609.500662.63453.134286.944618.500668.06649.566298.233625.900669.28743.3873012.708610.500675.07164.571314.051623.500669.91346.413327.183625.400671.45546.055335.134600.800674.50773.707348.398618.200669.22251.022352.411616.500670.52154.021

363.052614.000673.23359.233376.933605.500664.99759.497384.761628.000665.00637.006消防校核计算管道参数表管道编号管径(mm)管长(m)流量(L/s)流速(m/s)T米损失(m)管道损失(m)2-15355435.200102.7961.0392.8671.2482-1560408.900374.0691.5193.3721.3793-22001022.50053.2861.69614.21014.5304-32001347.00056.3491.79415.77321.2465-4200788.40046.9431.49411.2228.8486-3160682.30016.5061.0729.3616.3877-6160467.10021.5691.0737.9643.7208-7315843.90067.5950.8672.374290060.3451.2295.9704.78710-92502099.20047.5660.9693.8468.07411-10200181.80037.5181.1947.4061.34712-7315324.40096.3681.2374.5711.48313-12315214.90098.7431.2674.7821.02814-1331574.000100.0151.2834.8970.36215-1431561.100100.6101.2914.9510.30316-2400558.400205.5041.6355.7803.22816-17400532.600149.2241.1873.1851.69617-184001088.700142.0821.1312.9083.16618-19200589.60043.1901.3759.6135.66818-33225459.90033.1570.8343.3151.52518-36225333.50054.8471.3798.3922.79919-20200495.10038.4121.2237.7363.83020-21200156.70035.5411.1316.7021.05021-38160417.8005.1760.3361.1420.47721-22200283.20026.5870.8463.9291.11322-23200726.10022.1420.7052.8112.04123-24160820.90015.3280.9968.1696.70624-26200333.30054.7451.74314.9454.98125-24200770.50061.5941.96118.63014.35526-3