VO=15.28/0.2×3044.5=0.02509=2.5℅
&C=0.01512
V=1+&C(n-1)0.49/√N=1+0.01512×(3043.5)0.49/
√3044.5=1.77√3044=3.2℅
q=19.33L/S
D150 V=1.03 R=13.2
G4-11=960=27.78L/S N=5535
V0=27.78/0.2×5535=2.51℅&C=0.01512
V=1+&C(N-1)0.49/√N=1+0.01512×(5534)0.49/√5535=
2.032/74.398=2.73℅
q=30.09L/S D150 v=1.59 R=30.5 D200 v=0.97 R=8.8
平均的小区回水量：1260T/d北区：
当DN=170JF V=1.18 R=69.6 Q=242L/S
南区自来水，中区加压给水：
11＃G11=192 N11=1107 q=9.73L/S=36T/d
8＃G8=96T/h N8=553.5 q=6.25L/S
9＃G9=144T/h N9=830.5 q=8.23L/S
8＃+9＃=653.5+830.5=1384 q=11.42L/s
V=1+0.01512(2490)0.49/√2491=1.6977/2491=0.034=3.5℅
q=16.60L/S
D125 V=1.24 R=23.5 D=150 V=0.90 R=10.2
G6+G7+G10+G11=96×2+144+192=528T/d=15.28L/S
QC=15.28L/S N=3044.5
V0=2.51％&c=0.01512
V=1+0.01512(276.75-1)0.49/√276.75=1+0.23×/16.6358
=0.07438=7.4％
q=0.2×V×Nq=0.2×0.07438×276.25=4.11L/S
查表法：技术措施P447
（一单元）
当N=280时V=7.40 u=2.5 Q=4.15L/S
10#G10=144T/h N10=830.5 q10=8.23
8＃+9＃＋10＃＋11＃=1384+830.5+1107=3321 q=21.14L/S
4＃G=96 N4=558.5 q=6.25
5＃G=96 N5=553.5 q5=6.25
4＃+5＃=N4+N5+1107 q=9.73=36T/d
Vo=2.5%&C=0.01512
V=1+0.01512×(696.75-1)0.49/√696.75
=1.37355/26396=0.052
q=0.2×v×Ng=0.2×0.052×696.75=7.251L/S=26T/N
DN80 V=1.47 R=62.3
D100 V=0.84 R=15
1＃＋2＃＋3＃=1107＋696.75=1803.75
1＃＋2＃＋3＃=DN125
3＃给水流量计算：
1：西单元：
1×A户：坐便2个，浴盆1个，淋浴1个，洗脸盆2个，洗衣机1个，洗菜盆1个
2×B户：坐便1个，淋浴1个，洗脸盆1个，洗衣机1个，洗菜盆1个
1×C户：坐便1个，淋浴1个，洗脸盆1个，洗衣机1个，洗菜盆1个
合计：坐便5个，浴盆1个，淋浴4个，洗脸盆5个，洗衣机4个，洗菜盆4个
96T/d折合553.8当量，1260折7266当量
查表：当N＝7500时用水量为38.06L/S＝138.6T/d
设计物流量：38.06L/S＝138.6T/d
当DN200 V=1.25 R=13.7
当DN150 V=2.04 R=50.3
当双路供水时：G＝70T/t＝19.5L/S
D=125 V=1.47 R=32.8 D=150 V=1.03 R=13.2
当q=4.2L/S D=70时V=1.19 K=51.2mmH2O/m
D=80时V=0.85 R=21.7
2个单元时：Vo=2.5%
V=1+0.08512(553.5-1)0.49/√553.5
=1+0.3337/23.526=0.057=5.7%
(二单元)
q=0.2×0.0567×553.5=6.27L/S 1栋楼
15层：18.45×15＝276.75
设计秒流量：q=0.2×v.Nq
V=1+&c(Nq-1)0.49/√Nq
V0=Q3/0.2Ng=2.5%
Qs=2.50=25000/3600=0.6944×2=1.3889L/S
V0=QS/0.2×N8=0.6944/0.2×1.3889/0.2×276.95=0.0251
=2.42397/√6428=0.03023=3%
q=0.2×V×Ng=0.2×0.03023×6428=40.08L/S
40L/S=144T/h
2根给水管：DN150 q=20L/S V=1.06 R=13.0
G9=144T/d=4.166 Nq=836.5
VO=Qs/0.2×Ng=4166/0.2×830.5=0.02508=2.5℅
当供水量为160T/d双路供水时G=80
D=150 V=1.19 R=172
给水管道8层供水立面DN50时校核：
当量值18.45×8＝147.6
V＝1+0.01512（147.6－1）0.49、147.6＝0.0966＝9.66℅
q=0.2×0.0966×147.6=2.853=2.9L/S
当DN50时节V=1.37 R=93 100×100=1NG
加压供水总管道：
G1+G2=1260+926=227T/n
D=200 v=203 R=35.8
北区：N=2000
南区：N=4428
北区+南区：N=6428 G=1260
计算：
QS=1260÷24×2.5÷3.6=36.46L/S
VO=Q3/0.2×Ng=0.04116=4%
V=1+&c(Ng-1)0.49/√Ng=1+0.01939(6427)0.49/√6428
2单元管经：DN=80 V=1.27 R=46.4 D=100 V=0.73 R=11.4
1＃＋2＃：N=553.5×2=1107查表q=9.73
G=9.73DN=100 V=1.13 R=26.0
1＃＋2＃＋3＃=1107+700=1800+200=2000
G=16.13L/S D=125 V=1.20 R=22
2：东单元：
Hale Waihona Puke C＋3D＋B＋E＋F=7C合计：坐便7个，淋浴7个，洗脸盆7个，洗衣机7个，
洗菜盆7个
总计：坐便12浴盆1淋浴11
洗脸盆12洗衣机11洗菜11
当量值：便器0.5浴盆1.2淋浴0.75脸盆0.75洗衣1.0洗菜1.0
0.5×12＋1.2×1＋0.75×11＋0.75×12＋1.0×22
=6＋1.2+17.25+22=46.25每层N
室内给水管道设计秒流量计算:
2＃楼：A＋B＋B＋C每系统15层每层2单元
每单元4户每户4人每人每日0.2ｍ3用水量
4×4×0.2×15=48T/d÷24×2.5=5.0T/t
G=5.0T/h DN=70 V=0.4m/s R=6.83mmH2O/m
当量计算法：
洗脸盆N=0.75浴盆1.2淋浴0.75
3R=100×100=10000=10米压降1㎏
给水系统一：
F5-F12F13-F19 G=1260T/d=131.25T/d
D150 v=1.93 R=45.2D=200 v=1.18 R=12.4
给水系统二：F20-F27 F28-F34 98.20
G=926T/d=96.45T/h
D150 v=1.43 R=24.7D=200 v=0.88 R=7.08
6＃g=96 n6=553.5 q=6.25
4＃+5＃＋6＃=1660.5 q=13.02
7＃：G=96 N7=553.5 q=6.25
4＃+5＃+6＃+7＃=2214 q=15.54
(4＃+5＃)+(8＃+9＃+10＃+11＃)=1107+3321+4428 q=36.24
Vo=Qs/0.2×NG=36.49/0.2×4428=0.04116
Vo=Qc/0.2×N=0.74/0.2×147.6=2.51%
V=1+0.01512(146.6)0.49/√147.6=1.174/12.15=9.66%
q=0.2×0.0966×147.4=2.853L/S=10.4T/t
D=50 v=1.37 R=93.2
D=70 v=0.82 R=25.7
座便器0.50洗衣机1.0洗菜盆1.0
A：洗脸盆2座便2浴盆1淋浴、菜盆、洗衣机1
B.C:洗脸盆＋坐便＋淋浴＋菜盆＋洗衣机各1
合计：洗脸盆5×0.75＝3.75坐便5×0.5＝2.5
浴盆1×1.2＝1.2沐浴0.75×4＝3.0
洗菜盆1×4＝4洗衣机1×4＝4
∑N＝3.75＋2.5＋1.2＋3.0＋4＋4＝18.45
V=1+C(NG-1)0.49/N=1+0.02816(4427)0.49/4428=0.04092
V=1+0.01512(829.5)0.49/√830.5
=1.4072/√830.5=0.0488=5℅