CONNECTION STRUCTURE FOR TUNNEL TIMBERING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a connection structure for tunnel timbering materials capable of ensuring easy connection of tunnel timbering materials without troublesome work for fastening bolts and performing connecting work with only mechanical force of a heavy machine. SOLUTION: In a connection structure for tunnel timbering materials, the upper end of a tunnel timbering material A is formed in almost the same shape as the outer periphery shape of an upper end contact face and provided with a sheathed connection material 10 having a sectional cavity in which the upper end of another timbering material B is smoothly fittable. The upper end of the tunnel timbering material B is fitted into the cavity of the sheathed connection material 10 for the tunnel timbering material A to connect both tunnel timbering materials A, B.