The scope consisted of removal of numerous types of temporary structures
such as steel beams, concrete upstands, hobs, kerbs, wing-walls, columns,
penetrations & mass infills.
The project presented significant materials handling challenges including the
demolition of four 8m high, full strength, heavily reinforced concrete wing-walls
and three large columns.This required the progressive cutting and removal of
600 tonnes of concrete in blocks ranging up to 2 tonnes each from heights 50m
above ground level.
The “Top Down” construction methodology which allowed basement and tower
works to operate concurrently required additional support around the core
structure from ground floor. The wing walls and columns provided the structural
integrity were demolished upon completion of the basement works.
Many challenges were encountered given the complexity of the activities
required to achieve Crown’s desired outcome safely and the risks presented
were not to be underestimated. Special consideration was made to working
at heights with heavy loads and various materials handling difficulties.
Synergy’s approach was tailored to minimise risk using best engineering
principles to ensure work was completed in the safest manner.
Specialised concrete demolition methods such as wire sawing, hydraulic
wall sawing, demo sawing & hydraulic bursting formed the majority of
demolition operations on the walls and columns.
