Cooling Water Intake
HEIGHT: 5.0 m
WIDTH: 21.0 m
TOTAL IMMERSED LENGTH: 260 m
FABRICATION METHOD:
Tunnel element was cast in sections 20 m long with 2 m
gaps between them. These gaps were not concreted until
much later. Element was supported on concrete piles
driven in basin bottom.
WIDTH: 21.0 m
TOTAL IMMERSED LENGTH: 260 m
FABRICATION METHOD:
Tunnel element was cast in sections 20 m long with 2 m
gaps between them. These gaps were not concreted until
much later. Element was supported on concrete piles
driven in basin bottom.
Dora Creek, Lake McQuarle, N.S.W,
Australia
Electricity Commission of N.S.W.
John Holland (Constructions) Pty Ltd
260m
260m
Project construction
1981-04-30
1
Four tubes
5m
21m
Because of the low height to length ratio, the element was sensitive to longitudinal
bending moments during float-out and lowering into final position.
bending moments during float-out and lowering into final position.
Tunnel element was cast in sections 20 m long with 2 m
gaps between them. These gaps were not concreted until
much later. Element was supported on concrete piles
driven in basin bottom.
gaps between them. These gaps were not concreted until
much later. Element was supported on concrete piles
driven in basin bottom.
No element joints. Section
joints were plane faced with
no shear keys or water
bars.
joints were plane faced with
no shear keys or water
bars.
Sand/fly ash pumped in underneath tunnel. Method was tested beforehand.