Risk management system for pylon Construction of a Long Span Cable-Stayed Bridge

With the increasing span of cable-stayed bridges, the height of pylons are also reaching their new records. Constructions of pylons become challenges during the whole construction process of long span cable-stayed bridges. In this paper, a systematic risk management method for pylon construction is proposed, which is applied to Sutong Bridge. Sutong Bridge is a cable-stayed bridge over Yangzi River in China, with a main span of 1088m, and its pylons are 306m high. Two cranes are used for each pylon during the construction process. Construction schedule, worker safety and construction cost increasing are set as targets which are considered in the risk management system. There are three main components in the proposed methods, which are general risk events assessment, remarkable risk events analysis and risk management handbook compile. The paper gives a detail introduction of the whole assessment process and main conclusion that obtained by its application in Sutong Bridge. With the successful finish of pylon construction in 2006, it is proved that the method is effective for the similar bridges and structures.