The main cable shape control and design of Sanchaji Bridge

摘要

This paper is intended to give a brief introduction on the structural design essentials andconstruction method of Sanchaji Bridge, a self-anchored suspension bridge with steel box girder(span contribution: 70+132+328+132+70m) located in Changsha, Hunan Province, China. SanchajiBridge distinguishes itself from other self-anchored suspension bridges in construction by having itshangers installed through jacking the steel box girder from the middle span of the bridge. In thisway, the hangers stretching are no longer a necessary procedure. The segmental catenary method isadopted to calculate the cable shape in all phases and the unstressed length of the main cable of thebridge.