Chong Ming Yangtze River BridgeAperçu
Located near Shanghai at the mouth of the Yangtze River, since 2008 the cable stayed bridge forms a key part of the 25.5km Chong Ming Crossing, which combines both bridge and tunnel sections. Above the main navigation channel the six lane bridge has a span of 730m and a total length of 1,430m. Deck height above the navigation channel is 53m, high enough for 50,000t bulk carriers and 30,000t container ships to pass below. Twin steel box girder deck boxes are used, separated by a 10m gap to minimise aerodynamic forces and connected by cross beams at 15m spacings. Balanced cantilever construction was used for the main span. Inverted Y shaped main bridge towers sit on massive foundations made up of 60, 2.5m diameter cast piles. Wind and live loads are significantly higher than the norm. The site is in an area frequently hit by typhoons, and the bridge is designed to take two railway tracks sometime in the future.
TENSA®MODULAR expansion joints Type LR22 with a movement capacity of 1,760mm, which permit movements and rotations in all three directions. All TENSA®MODULAR expansion joints feature mageba’s patented asymmetric control system for even gap distribution and are 100% watertight. To ensure high traffic safety also during rain, the steel surface was treated with an anti-skid surfacing that is also used on aircraft carriers. Experts consider this to be one of the most durable system available.
TENSA®MODULAR type LR22
max. movement 1‘760 mm