DEVELOPMENT OF A SEGMENT WITH SMOOTH INNER SURFACE WHICH CAN PROVIDE THE PRIMARY TENSILE FORCE

Abstract

One way to reduce the cost and duration of shield tunneling work is to eliminate the process of secondary lining. Despite various attempts, however, practical effective joints are not yet widely used. To develop an “Auto-Chuck segment” that can provide the primary tensile force, offers mechanical properties and high-speed assembly equivalent to conventional bolted joints, and contains all the joint members inside, the authors studied the strength performance of joint sections.