ARRANGEMENT STRUCTURE OF JOINT PART FORMING PLATE MEMBERS

To provide an arrangement structure of joint part forming plate members capable of allowing workers to efficiently and smoothly perform work to pull out the joint part forming plate members which are arranged consecutively along the circumference of the tunnel along the circumference of the formwork body from a gap formed in the formwork body.SOLUTION: The arrangement structure of joint part forming plate members which are used being attached to formwork for tunnel lining 10 for forming an inducing joint on tunnel lining concrete constructed. The formwork for tunnel lining includes movable frame part extending in the direction of tunnel excavation, and a formwork body 3 for forming a lining space between the inner wall of the tunnel being supported by the frame part. At least a part of multiple joint part forming plate members 15 which are arranged consecutively in the circumferential direction of the formwork body 3 are chevron-shaped plate members 15' in which the distance between side edges s, s located on both sides of the formwork body in the circumferential direction has a shape that expands from the outer peripheral side a to the inner peripheral side b opposite to the outer peripheral side.SELECTED DRAWING: Figure 7 【課題】トンネルの周方向に沿う型枠本体部の周方向に連設配置された目地部形成用プレート部材を、型枠本体部に設けた隙間から引き抜く作業を、効率よくスムーズに行うことができるようにする。【解決手段】トンネル覆工用型枠１０に取り付けて用いられて、構築されるトンネル覆工コンクリートに誘発目地を形成するための目地部形成用プレート部材の配設構造であって、トンネル覆工用型枠は、トンネルの掘進方向に移動可能な架台部と、該架台部に支持されてトンネルの内壁面との間に覆工空間を形成する型枠本体部３とを備えており、型枠本体部３の周方向に連設配置された複数の目地部形成用プレート部材１５の少なくとも一部は、型枠本体部の周方向の両側に位置する側部辺部ｓ，ｓ間の間隔が、外周側辺部ａ側から外周側辺部とは反対側の内周側辺部ｂ側に向かって拡大する形状のハの字状プレート部材１５'である。【選択図】図７