No_5_May_1969 — Page 40

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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