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project encompassed constructing a clarifying tank with
bioreactor channels running around its external wall.
The overall structure is colloquially called a “scooter”.
The diameter of the clarifying tank is 45m, the diameter
of the baffle wall on the outside of the tank is 64.5m
and the diameter of the outside wall is 84m, the height
is 5.7m.
The Sandgate WWTP is located at Boondal
in Brisbane and was constructed by the Brisbane Water
Enviro Alliance (B.W.E.A), which was made-up of John Holland
Pty Ltd, Brisbane City Council, Brisbane Water, Aquatec-Maxcon
Pty Ltd, MWH (Environmental Engineers) and JWP (Consulting
Engineers). RMD Australia’s client was John Holland
Pty Ltd.
RMD supplied 540m² of Reflex Panels
to form the clarifier tank wall and the baffle wall forms;
the pour length was 8.0m (4 panels long) and 6m high (2
x 2.4 + 1.2 Panels) The photograph shows the Reflex shutters
with Super Slim Soldiers running up the back of them,
these are required to strengthen the join in the panels
when the panels are being gang lifted.
The clarifier tank is a “floating
tank”, that is it has no starter bars or any fixings
down to the footings whatsoever, it sits or “floats”
on top of a rubber strip to provide a seal, this means
that the tank walls require back propping until the full
circumference is achieved, RMD supplied Tilt Slab Props
for this purpose.
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