1例题1:下图为某7层住宅给水管道计算草图,立管A和C为普通住宅Ⅱ型,一卫(坐便器、洗脸盆、淋浴器各一只)一厨(洗涤盆一只),有洗衣机和家用燃气热水器。24小时供水,每户3.5人。立管B和D为普通住宅Ⅲ型,两卫(坐便器、洗脸盆各两只、浴盆和淋浴器各一只)一厨(洗涤盆一只),有洗衣机和家用家用燃气热水器。24小时供水,每户4人。用水定额和时变化系数均取平均值,1计算各个立管和各段水平干管的U0值2求管段A1~A2,A7~A,B1~B2,B7~B,A~B,B~C,C~D,D~E的设计秒流量2图A1A2A3A4A5A6A7D1D2D3D4D5D6D7B1B2B3B4B5B6B7C1C2C3C4C5C6C7ABCDE3解1.查GP57表3.1.9确定用水定额和时变化系数⑴Ⅱ住宅用水定额(130+300)/2=215L/人d,时变化系数(2.8+2.3)/2=2.55⑵Ⅲ住宅用水定额(180+320)/2=250L/人d,时变化系数(2.5+2.0)/=2.252.查GP59表3.1.14确定每户当量数⑴Ⅱ住宅N=0.5(便)+0.75(脸)+0.75(淋)+1.0(厨)+1.0(衣)=4.0⑵Ⅲ住宅N=0.5(便)×2+0.75(脸(×2+0.75(淋)+1.2(浴)+1.0(厨)+1.0(衣)=6.4543.立管A和立管C的U0值4.立管B和立管D的U0值%8.2864000.42.055.25.321501U%28640045.62.025.20.425002U55.干管BC的U0值6.干管CD的U0值7.干管DE的U0值与干管BC的U0值相同%3.245.674745.6702.047028.002U%5.245.64245.602.042028.002U68部分管段设计秒流量管段当量NU0%qg/L/sFPA1~A242.80.41685A7~B282.81.15685B1~B26.452.00.52685B7~B45.152.01.44686B~C73.152.31.90686C~D101.152.52.30686D~E146.32.32.786867例题2.下图为某10层普通Ⅲ型住宅给水管道计算草图,设两卫(坐便器、洗脸盆各两只、浴盆和淋浴器各一只)一厨(洗涤盆一只,有热水),有洗衣机。采用集中热水供应。24小时供水,每户4人。用水定额和时变化系数均取平均值,1计算U0值2求管段1~2,2~3,A~B,B~C,C~D,D~E,E~F,F~G的设计秒流量89810ABCDE1234567GF9解1.查GP57表3.1.9和GP85表5.1.1.1确定用水定额和时变化系数用水定额(180+320)/2-(60+100)/2=170L/人d,时变化系数(2.5+2.0)/2=2.252.查GP59表3.1.11确定每户当量数N=0.5(便)×2+0.5(脸)×2+0.7(厨)+1.0(浴)+0.5(淋)+1.0(衣)=5.2103.求U0值%7.1864002.52.025.241700U114部分管段设计秒流量管段当量NU0%qg/L/sFP1~25.21.70.466852~310.41.70.66685A~B521.71.54686B~C1041.72.27686C~D1561.72.75686D~E2081.73.24686E~F2601.73.65686F~G3121.74.04686