Industrial Ringroad stay cable bridge - Thailand
VSL setting the pace erecting two stay cable bridges
simultaneously in central Bangkok
Picture showing three of the four pylon of the Industrial Ring road Bridge.
Scope of works performed
• Supply + installation
of post-tensioning
• Supply + installation
of stay cables
• Erection of deck segments
consists of three separate contracts,
of which VSL were involved in the
contract 1 and 2:
• Contract 1: Southern Section: stay
cable composite bridge across
Chaophraya at Southern Phra
Padaeng with 7 traffic lanes,
concrete pylon height of 172m,
main-span of 398m, totally 702m
long and 1090m ramp
6-73, 6-85 and 6-91, with a length
between 75.6m and 212.4m. VSL
(Thailand) Ltd. was awarded the
contract for the supply & installation
of 2,570t post tensioning & 2,300t
of stay cable as well as the segment
erection works for C1 and C2
in June 2001.
The first stay cable was installed on
16th November 2005 and following a
tight five and six day cycle, the
• Contract 2: Northern Section: stay
erection works were finalized within a
cable composite bridge across
record time of 4 months with the last
Chaophraya at Northern Phra
stay cable erected 19th March 2006.
Padaeng with 7 traffic lanes,
VSL standard strand-by-strand
concrete pylon height of 162m,
installation techniques utilizing
a main span of 326m, totally 576m winches and were stressed by a
long and 2300m ramp. The
combination of manual and
automatic
conforming
f
i design
d i off th
the stay
t
t
ti stressing
t
i systems.
t
cables specified strand stay cables The specification for the project stay
with the pylon anchorages as active cables were based onto PTI-2001.
and deck anchorages as passive
Subsequently three fatigue tests of
connection. The size of the stay
sizes 6-43, 6-55 and 6-73 + one leak
cables used on the project
tightness test were conducted and
varies between 6-43, 6-55, 6-61,
passed the criteria laid out.
ID 1546
The idea for an industrial ring
road system was originally put
forward by his Majesty the King,
in order to relieve the traffic
congestion for the areas of Bangkok
Port, Poochao Saming Phrai Road
and Suksawat Road which are the
main industrial areas.
As such, the Industrial Ring Road
(IRR) will be utilized for
transportation between the industrial
estates in Phra Padaeng and Samut
Prakarn and Klongtoei Port and the
connection to Rama 2 Highway,
Sukhumvit Road and Bangna – Bang
Pakong Highway. The IRR Project
Methods, drawings, materials and
suppliers, all went through an
extensive approval process and
procedure, where all component
suppliers received individual visits
from the client’s engineers and went
through quality audits
audits, before being
approved for the project.
The composite bridge deck segments
were pre-fabricated approximately
22km down the Chaophraya River
and transported to the vicinity of the
bridges, the lifting speed of the VSL
system was set such that the lifting
could be completed safely in
approximately two hours. The
composite bridge deck segments
were pre-fabricated approximately
22-km down the Chaophraya River
and transported to the site by barges.
Using the new highly mobile VSL
Modular Self Launching Deck
Erection Gantries, the 36 x 12m
segments weighing 500t were lifted
from the barge to the final deck
elevation.
The key works of deck lifting and stay
cable installation were carried out by
VSL operating on a 24/7 schedule,
the co-ordination between the two
disciplines resulted in a erection
cycle two days faster than initially
anticipated, allowing a gain of
about a month in main
decks erection program.
OWNER
Kingdom of Thailand; Ministry of Transport,
Department of rural Roads
ENGINEER
Asian Engineering Consultants
Corp.,Ltd,Team Consulting Engineering &
Management
g
Co., Ltd, Thai Engineering
g
g
Consultants Co., Ltd, Index International
Group Co., Ltd
Jean Muller International
MAIN CONTRACTOR
TNNS-JV Taisei Corporation Nishimatsu
Construction Co., Ltd, JFE Engineering
Corporation (formerly
known as NKK Corporation), Sino Thai
Engineering and Construction PLC
VSL ENTITY
VSL Thailand
DATE
2006
Yellow coloured VSL SSI 2000 stay
cables being fashion in Bangkok
Bridge deck being constructed
over a busy Chaophraya River
Lifting equipment
Edited 2007
www.vsl.com
ID 1546
Panoramic view of the completed bridges