CONCRETE INJECTING/PLACING PORT JIG FOR SHIELD MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a concrete injecting/placing port jig for a shield machine simply fitted to or removed from a concrete injecting/placing port and capable of easily extracting hardened concrete. ;SOLUTION: The ground 1 is excavated by a cutter at the tip, a peripheral wall 1a of the ground 1 is covered with a formwork 4 at the prescribed interval, concrete (c) is placed between the formwork 4 and the peripheral wall 1a, and the inner face of the peripheral wall 1a is lined by a jig 21 provided at the concrete injecting/placing port of a shield machine 3. A concrete placing passage 24 is formed at the center section of a cylindrical main body 22. The main body 22 is divided into multiple portions in the peripheral direction.;COPYRIGHT: (C)1997,JPO