INNOVATION IN BRIDGES
Da Nang, a city of 1 million inhabitants in central Vietnam, is one of the
country’s fastest developing areas. The city staged an international design
competition for a new bridge over the Han River in 2007 that resulted in a
new landmark for the city. The bridge is a $100 million six-lane, cable-stayed
concrete structure with a backward inclined tower in the middle lane. The
bridge is 730 meters long and 33. 5 meters wide, with a 230-meter-long main
span. The tip of the tower rises 145 meters above the surface of the river. At
the top there is a public viewing platform that will be open to the public.
platform, however, proved to be a challenge. A solution for the design of an
elevator located outside the pylon was developed in cooperation with the lift
manufacturer. The minimal number of supports in the river mitigated impact
on the environment, and the cantilever construction method for the main span
eliminated the need to restrict traffic on the river during construction.
2009 BE INSPIRED AWARDS
RM Bridge proved to be an efficient tool for optimization of the structure,
especially for the stay cables. WSP Finland was able to perform advanced
stage-by-stage analysis of the bridge construction, taking into account the
time-dependant properties of materials. Providing access to the tower
Working under tight time constraints, WSP Finland delivered the design of this
complex structure on time. The design and associated environmental plan were
especially praised for its technical and visual success. Construction began
at the end of 2008, and the bridge will be ready for commissioning in 2011.
Upon completion, the spiral geometry of the back span cables will result in a