38
Foot concrete
Steel support
1
Upper Half Excavation
& Steel Support
Type I 0.8 min.
5.23
5.4
R = 6m
4
Arch & Side Walls Conc.
Construction sequence
flow direction
Tsangwan River
Plan of diversion tunnels
360--
320 MON
280
240
200
120
0.8 Type Il
1.0 Type III
switch yard
No. 2 diversion tunnel
GHC5
GHC3
2
Lower Half Excavation
GHB1
GHC7 GHB2 GHC8
45
22.59
450
45
46.5°
45°
GHC1
5
210
GHC2
Low & High Pressure Grouting
(GHC) (GHB)
Spillway
The
No. 1 diversion tunnel
power plant
160-
GHB1
GHC6
GHC4
25° 50
25° 50
3
Invert Concrete
0
50 100 M
flow direction
Far East BUILDER, May 1969
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