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TRANSCRIPT
YdH
X
Y mX mHd m
p
Xp Hd n
np n
Xp p X m
a Hd mb Hd mc Hd m
d Hd mr Hd mr Hd m
Hd m
hv
d
a
rr
b
n
p
Y
X
Hd
Yp
Xp
c
········································································································· (3.4.6)
69
Hd P
Cd PHd
C
d
d
HHa
HHa
H mHd mP mCCd H Hd
a a H Hd C Cd
Cd
Hd Hd
P
HWL HWL
T
P RT P
T
Hd Hd
R RR Hd HdR Hd
HWL Hd
71
B B Ka Hd
Bt B Bc
B m B mKa
Hd mBt mBc m
d
d
Hdh
d
d
Hh
d
d
Hh
hd d Hd P
P Hd
C
P Hd R1
P/Hd 0.2 0.5 1 2 5
1.8 1.8 2 R1 Hd 0.5Hd 1.8 2
1/4 2.1 2.1 1.84 2.1 2 1.83
( ) 2.0 2.1 2.15 2.16 2.18
······································································································· (3.4.10)
73
b b
Hd
P Levelh Vhv h
V
l l
hVA B C
V g
V g
V VgK hm
h V
P Hd h hv Z hg
V Z hhbg
dQ Z
P m Hd m h m hv m
Z m
V m sg m sQd m sb m
h l V l
rFhg
V
hh
rF
l h
Vhb
dQ
·········································································· (3.4.15)
75
Fr
h B ml mV B m s
BC
B hg
V hg
Vg
VVKhm
h C m
hbg
dQ
b C mV C m s
Vhb
dQ
Khm m
hm lII
IR
Vn IR
Vn
n I I R B mR C m
B CA B
C
76
m
s
iB d d B
Fr
DgVFr
m sg m s
D A T mA mT m
1/2.5
m q
m 0 q
Fr
dgV
Bdm
BdmBd
rFgQ ···························································································· (3.4.17)
m 0.7 m d / B 0.5
78
d 0.463rF
Q ( m s ) ··········································································································· (3.4.18)
0.44 0.5 d (0.643 0.61) Q2/5 (m s ) ································································································· (3.4.19)
A
A (B dm ) d (3.4.20)
X Bx (m) Zx (m)
Bx
LXB 11 ················································································································· (3.4.21)
Zx i1 X B (m)
B /B B /B 0.5 B X (m) L (m) B i1 1/13
l (m) l 4 d ························································································································· (3.4.22)
d (m) i2
i2 g n2 Fr 2d
Bd
···································································································· (3.4.23)
n
Bx B
a
Wt
b
Hd
Bx
B
d
R s
m
qd Qd Wt
qd Qd Wt
a b a a
b b
79
A
A
V
W tw
b
tw
tw cmtw
cm
a
cm
W
W
t p W
W
W
cm
A A
W W
W
b
t w
W
c
cm
W tb W
cm
cm
b
cmQ
m /s a b c tw tf tb tp
W Q
Q m sW
m
W
Yq q Q
H
Y
V
d
TW
q
b b
87
I III or IV
He
P
Y
Ld
df dd
VTW
hd
LI III or IVX
Ld
USBR III USBR IVLd D hd He Y
d d F D Yq
YdF
Yd
YgqD c
q m s mg m sY m
dcg
qm
Fdg
V
dVq
m
V m sd d F
USBR III IV F
FUSBR I
88
F USBR IVF USBR III
USBR I
F
D
hd
Lp
LB Lp dc
dc dc
dc
TW dc
He
P
He
P
Y
Ld LI III or IV
df dd TW
hd
Lp Y hd He
Lp Y hd HeLp Y hd He
Lp Y hd He
Lp Y hd He
F V g d
Ld Y hd He
Ld Y hd He
Ld Y hd He
Ld Y hd He
Ld Y hd He
dc Y
df Yd Y
d Y
V d F Xdc df
Y
V
X
89
Westergaard
hbKP whew
hhew
Pew kNKh
w kN mh mb mhew m
hew
Pe wh
Westergaard V
·················································································· (3.4.33)
95
(N/mm2)
SD295 176 264
157 264
SD345 196 294
176 294
( ck 21N/mm2)
8 12
0.42 0.63
1.5 2.25
( ck 24N/mm2)
9 13.5
0.45 0.67
1.6 2.4
101
(VP)
D13mm 16mm D16mm 20mm L 500mm
D16 19mm 19mm D19mm 25mm L 500mm
D22mm 25mm D25mm 30mm L 500mm
1) U.S.Bureau of Reclamation Design of Small Dams
D.R.Waldron Design of Labyrinth Weirs, MSc thesis, Utah State Univ.
D.S.Miller Discharge Characteristics, Balkena PublishersN.Hay,G.Taylor Performance and Design of Labyrinth Weirs, Jour. of HY,ASCE
T/2
T/2
T VP
500 m 500 m
104