VSL's innovations Dampers on test Penny's Bay in HK
VSL's innovations Dampers on test Penny's Bay in HK
VSL's innovations Dampers on test Penny's Bay in HK
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H<strong>on</strong>g K<strong>on</strong>g<br />
Deep <strong>Bay</strong> projects<br />
<strong>on</strong> the start<strong>in</strong>g blocks<br />
> Gamm<strong>on</strong> Skanska has awarded<br />
VSL H<strong>on</strong>g K<strong>on</strong>g a sub-c<strong>on</strong>tract to<br />
erect pre-cast segments <strong>on</strong> the<br />
Deep <strong>Bay</strong> L<strong>in</strong>k North and<br />
Shenzhen Western Corridor. The<br />
Deep <strong>Bay</strong> Project is a new crossboundary<br />
road l<strong>in</strong>k between H<strong>on</strong>g<br />
K<strong>on</strong>g, New Territories and<br />
Shenzhen, Ma<strong>in</strong>land Ch<strong>in</strong>a.<br />
Segment erecti<strong>on</strong> started <strong>in</strong> June<br />
Malaysia<br />
Lift<strong>in</strong>g traffic woes<br />
> The use of a lifter is m<strong>in</strong>imis<strong>in</strong>g<br />
traffic disturbance dur<strong>in</strong>g erecti<strong>on</strong><br />
of pre-cast segments for the 720m<br />
Jalan Gopeng Viaduct. Cranes would<br />
have caused far more disrupti<strong>on</strong> to<br />
travellers <strong>on</strong> the busy road lead<strong>in</strong>g to<br />
Ipoh town. Up to 4 segments are<br />
be<strong>in</strong>g placed a day, speed<strong>in</strong>g up<br />
c<strong>on</strong>structi<strong>on</strong> of the viaduct that will<br />
ease c<strong>on</strong>gesti<strong>on</strong>. Each of the<br />
282 segments is a s<strong>in</strong>gle cell box and<br />
their weights range from 80t to 95t.<br />
The balanced cantilever method is<br />
used to erect most segments <strong>in</strong> the<br />
48m to 60m spans. Launch<strong>in</strong>g is<br />
carried out by a comb<strong>in</strong>ati<strong>on</strong> of a<br />
short span stati<strong>on</strong>ary truss and<br />
lifters equipped with SMU-120 jacks.<br />
The truss is used for the pier<br />
segment and some of the span<br />
elements before be<strong>in</strong>g removed by<br />
cranes. The lifters are then<br />
assembled <strong>on</strong> both sides of the<br />
erected deck. Once each pair of<br />
segments has been put up, the<br />
cantilever tend<strong>on</strong>s are stressed and<br />
the lifters can then be launched<br />
forward to pick up the next<br />
segments. A typical erecti<strong>on</strong> cycle for<br />
<strong>on</strong>e cantilever is 14 days. The bridge<br />
level and alignment is m<strong>on</strong>itored as<br />
the launch<strong>in</strong>g progresses. ■<br />
C<strong>on</strong>tact: ckch<strong>on</strong>g@vsl.com.my<br />
with completi<strong>on</strong> due by mid 2005.<br />
Deep <strong>Bay</strong> L<strong>in</strong>k North has the<br />
largest structure, c<strong>on</strong>sist<strong>in</strong>g of<br />
tw<strong>in</strong> 5.4km decks. Three overhead<br />
gantries and a scaffold system are<br />
needed to erect 3,000 pre-cast<br />
segments, which weigh between<br />
35t and 80t. Shenzhen Western<br />
Corridor has a length of 3.02km<br />
and is also a tw<strong>in</strong> deck structure.<br />
Two overhead gantries will erect<br />
approximately 2,000 pre-cast<br />
segments, rang<strong>in</strong>g from 100t to<br />
170t. ■ C<strong>on</strong>tact: dom<strong>in</strong>ique.dr<strong>on</strong>iou<br />
@hk.vsl-<strong>in</strong>trafor.com<br />
N E W S N ° 1 • 2 0 0 4<br />
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