TUNNEL LINING STRUCTURE AND TUNNEL LINING CONSTRUCTION METHOD

To provide a tunnel lining structure and a tunnel lining construction method, each of which make it possible to construct a tunnel lining efficiently and economically by using PCa members.SOLUTION: A tunnel lining structure according to this invention is constructed with: coupling adjacent segments 1 each other in the circumferential direction of a tunnel by an inter-piece joint 3 consisting of a male joint and a female joint; coupling the adjacent segments 1 each other in the tunnel axial direction with the inter-ring joint 4; arranging a plurality of segments 1 which is an arc-shaped PCa member in succession along the excavated inner surface of the earth's mountain; and constructing a tunnel lining of a mountain tunnel which covers the inner surface of the excavation.SELECTED DRAWING: Figure 4 【課題】ＰＣａ部材を用いて効率的且つ経済的にトンネル覆工を構築することを可能にするトンネル覆工構造及びトンネル覆工の施工方法を提供する。【解決手段】トンネル周方向に隣り合うセグメント１同士を雄継手と雌継手からなるピース間継手３で結合し、且つトンネル軸方向に隣り合うセグメント１同士をリング間継手４で結合して、円弧盤状のＰＣａ部材である複数のセグメント１を連続して地山の掘削内面に沿って設置し、掘削内面を被覆する山岳トンネルのトンネル覆工を構成する。【選択図】図４