Construction methods of tunnel lining and spalling prevention structure of the tunnel lining and prevent spalling member

摘要

PPROBLEM TO BE SOLVED: To provide an exfoliation prevention member, an exfoliation prevention structure for a tunnel lining, and a construction method for a tunnel lining capable of remarkably reducing tremendously large investigation and repair costs, which were required before, resulting in no investigation of joint portions which are liable to be exfoliated. PSOLUTION: This exfoliation prevention member 19 covering the joint 17 of lining concretes 15 and 15 adjacent to each other in the extension direction of a tunnel 11 comprises a band-shaped hard resin plate 21 disposed along the joint 17, a bent part 23 formed by projecting the lateral center part of the resin plate 21 to one surface 21a side, and a plurality of locking pieces 27 formed on both sides of the bent part 23 projectedly from one surface 21a of the resin plate 21 and continuously in the longitudinal direction of the resin plate 21 and having swelled parts 25 at the projected ends. PCOPYRIGHT: (C)2005,JPO&NCIPI