JOINT FILLER STRUCTURE OF TUNNEL CENTRE

PROBLEM TO BE SOLVED: To provide a joint filler structure that can be used even in s telescopic mold tunnel centre and can be used in a tunnel curved part well.SOLUTION: A joint filler structure of a tunnel centre is configured by: positioning a formwork 2 in the tunnel longitudinal direction to a formwork 1 during lining concrete curing in the tunnel centre; providing a joint member 7 and a joint member 3 for forming a projection Pr following a cross-sectional shape of the joint of the lining concrete by being brought into abutment with an end face 11 of the formwork 1 and an end face of the formwork 2 opposed to each other, respectively; and movably providing a joint material piece 3 in the tunnel longitudinal direction, so that the joint material piece 3 can be moved toward a joint material piece 7 until coming into contact with the same so as to close a gap Gp between the end faces 11 and 21 of the formwork 1 and the formwork 2 from the outward in the radial direction. 【課題】テレスコピック型トンネルセントルでも使用可能で、かつトンネル湾曲部においても良好に使用できる。【解決手段】トンネルセントルにおける覆工コンクリート養生中の型枠１に対してトンネル長手方向へ型枠２を位置させ、互に対向する型枠１の端面１１と型枠２の端面２１にそれぞれ、互いに当接させられて覆工コンクリートの目地の断面形状に倣った突出部Ｐｒを形成する目地材片７と目地材片３を設け、目地材片３をトンネル長手方向へ移動可能に設けて、型枠１および型枠２の端面１１，２１間の間隙Ｇｐを径方向の外方から塞ぐように目地材片３を目地材片７に向けてこれに接するまで移動可能とする。【選択図】 図１