Experimental verification towards real construction of a slide type cotter formula segment

Abstract

Large Depth Underground Use is one of the future main direction of social infrastructure construction, and this background assigns the important role to the shield tunneling method. However, its application into large depth underground requires the development of long-distance high-speed construction technology, improvement in the durability of lining, cost curtailment, etc.-- We developed the new segment using the direction insertion type cotter formula joint of an axis (slide cotter) aiming at improvement in the speed, cost curtailment, and the formation of inside flat and smooth. This paper describes that the satisfactory result of practical examination for the aptitude to real construction of this new segment. In the concrete, the joint bending examination was carried out on the load conditions near the actual size assembly examination (3, 650mm of segment outer diameters) and real construction by the shield system.