Abstract
Although the flexible joint that consists of rubber gasket and PC wire, has been applied for the seismic joint of 8 immersed tunnels, that is insufficient in respect to the deformability for large earthquake movement or soil settlement Furthermore, long-term endurance of rubber gasket under high compression has not enough reliability.
The bellows joint made from steel, is a high deformable that joint used mainly in the field of piping. This paper shows the development of bellows joint adopted as the flexible joint for the immersed tunnel elements in lieu of conventional seismic joints.
