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Street Bridge will be a four-lane tolled cross-river
bridge with connections at Milton and South Brisbane
and dedicated pedestrian and cycle paths. The bridge
will be a three span, twin concrete box girder structure
built using balanced cantilever construction. Its construction
commenced in June 2008 and its expected completion date
is October 2010.
RMD designed and supplied various elements of formwork
and shoring for the main bridge deck and associated structures:
1. Pier Table Wall Formwork
Super Slim Soldiers and 150 x 77mm LVL timber wales were
used to produce formwork for the pier table walls.
250m² of formwork was required for each pier table
with walls approximately 6m high. The formwork had
to accommodate a 3m thick diaphragm wall within the
pour.
2. Coronation Drive Headstock Shoring
Each headstock was 9m long by 2.2m wide and 1.8m deep.
Propping heights varied from 2.5m up to 7m. Megashor
towers were used to support a grillage of steel beams
which in turn supported the soffit formwork. The Megashor
heavy-duty propping system was designed for axial loads
of up to 1,000kN, so it was ideal for this purpose.
3. Southern End Span Shoring
Approximately 600m² of Rapidshor shoring varying in height
from 4m up to 9m was used for the Southern End Span.
A portal to allow traffic to pass through the shoring
was incorporated into the design. This was achieved
using an arrangement of Slimshor Props and Super Slim
Soldiers as primary bearers. Jacks at either end of
a Super Slim Soldier easily convert it to a heavy duty
Slimshor Prop.
4. Northern End Span Shoring
Approximately 600m² of Rapidshor shoring varying in height
from 1m up to 4m was used on the Northern End Span.
This part of the shoring was directly over the Brisbane
River and had to be supported on a grillage of steel
which in turn was supported on piles driven into the
river bed.
RMD Brisbane have also worked with Macmahon on the Water
Infrastructure Solutions Alliance in Brisbane and with
Seymour Whyte on the Gold Coast Highway at Hope Island.
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