VSL's innovations Dampers on test Penny's Bay in HK

2 Squeezing in and
adjusting to constraints
SHARP RADIUS
The bridge consists of twin decks
each 11.0m wide, with three
continuous spans 35, 31 and 36m
long respectively. With a sharp
radius on plan and a super elevation
of about 6%, the bridge is squeezed
underneath the Expressway, and
above the railway lines. With all
these constraints already in place,
the bridge box was designed as a
continuous structure to reduce the
depth of the deck.
SMALL HEADROOM ABOVE
THE BRIDGE
The highway above prevented the
assembly of the gantry next to the
bridge. The equipment had to be
assembled about 80 meters away
from the first span, and had to be
launched in three stages to the
erection area. Clearances between
the gantry and the bridge above were
as low as 200mm.
WORKING OVER THE AIRPORT
EXPRESS AND MTR LINES
The erection works were conducted
between 1:30 and 4:30 am on limited
days per week, whilst the power to
the rail lines cut off. Specific
precautions and contingency plans
were developed in conjunction with
MTRC to cover any potential risk and
emergency measures that would
have had to be implemented in the
event of a problem which might
of impacted on the safe operation
of the railway.
N E W S N ° 1 • 2 0 0 4
25