25 Sep 01
Chongming crossing to be world's largest
A cable-stayed bridge with a main span of 1200m, designed by the same team that won the Stonecutters Bridge competition, is planned to be built from Shanghai to the island of Chongming in the Yangtze River delta. Halcrow, Flint & Neill Partnership, Dissing & Weitling and SMEDI have won the design competition for the new structure, which will have a main span 120m longer than their Stonecutters concept. The scheme also includes a 600m span cable-stayed bridge and 11km of approach viaducts. The solution has a twin box deck similar to that designed for the Hong Kong link, which the team claims is an economic way of achieving long spans. Suspension bridges were rejected because of the deep soft deposits in the Yangtze River bed which would make the construction of cable anchorages expensive and difficult.