Stonecutters Bridge, Hong Kong, China
(Outstanding Stucture Award Finalist)
This is a truly outstanding structure which has been designed and built to the highest quality standards. It spans accross the Rambler Channel and forms the centrepiece of the section for the new Route 8 between Cheung Sha Wa and Tsing Yi, providing a long lasting solution to Hong Kong’s growing traffic demands. Following concept selection via an international design competition, significant technical challenges in design and construction were overcome through state of the art techniques of modelling, testing, planning and erection. The 1018m span cable stayed bridge stands in an area of severe typhoons, and utilises a twin deck structure to ensure aerodynamic stability.
The Stonecutters bridge is certainly one of the great bridges built at the start of the 21st century, demonstrating that substantial progress has been made in cablestayed bridge technology over the last two decades. It is an interesting departure from other long span cable-stay bridges with A, inverted Y or diamond shaped towers and single decks. The towers are the highest freestanding monopole bridge towers in the world and incorporate a unique composite stainless steel-concrete upper section.
The streamlined split deck is ideally suited to cope with severe typhoon winds. The cross section was developed with straight inner faces of the longitudinal girders which has a number of advantages over a continuously curved soffit: improved joint between cross girder and longitudinal girder, which is easier to fabricate and inspect; less susceptible to Reynolds Number effects and more predictable behaviour; easier to install secondary structures such as guide vanes and rail for inspection gantry. The architectural lighting scheme for the bridge highlights its unique architectural features at night contributing a prominent feature that blends with the tall buildings and surrounding hills in the skyline of the urban landscape around the Victoria Harbour.
A comprehensive set of facilities for inspection and maintenance of the structure has been included in the design. The overall approach has been to ensure that normal
inspection and maintenance activities can be carried out with minimum disturbance to the traffic whilst providing easy and safe access for maintenance personnel.