Monday, July 3, 1972
Particular problems in addition to those mentioned, included handling
and driving piles up to 90 feet in length between buildings not more than 95'
-
Of apart whilst working above a canal approximately 401 O" in width; prestressing
support frames with pulls of up to 200 tons, working to within a few feet of
existing buildings which had to remain occupied; placing up to 400 tons of
concrete in single pours, above ground areas which had to be kept open for the
public; lifting and placing beams 75'-0" in length and in some instances
weighing as much as 38 tons, again within the restricted site area and above
the canal. A maximum clear span of approximately 110' O", was constructed
above Hennessy Road which could not be obstructed in any way during the daytime.
The contract was successfully completed by April 1970 within the specified 25
months period at a cost of HK$4.9 million.
Circular
OFF,
The Canal Road Flyover Extension was constructed to provide a connection
between Canal Road flyover and Waterfront Road. Within a short time of work
beginning, however, a decision was made to proceed with the Cross-Harbour Tunnel
and the scope of the contract was therefore revised.
A particular feature is the circular shape of the major flyover, which
is dictated by the very restricted area of site available for the whole of the
interchange. This posed problems when fitting the heavy precast beams within
the circular flyover deck; nevertheless other advantages accrue from the use
of precasting and in this instance it was combined with an insitu concrete
deck-slab and edge detail to give the required shape.
/In conjunction