Segment piece, segment ring and tunnel lining

摘要

Problem to be solved: to provide a segment piece, a segment ring, and a tunnel lining which can reduce the generation stress of concrete.A segment piece 10 constituting a segment ring;Body 20 mainly composed of concrete andIt is buried inside the body partA plurality of main bars 30 arranged to extend in the circumferential direction of the segment ringDiameter of segment ringAndArranged to extend in the axial direction of the segment ringA plurality of distributing muscles 40 for restraining the plurality of primary musclesThe end surface 20f of the body portion 20 is buried so as to extend toward the center toward the central portion.Multiple compression steel 50 formed in a rod shapeEquipped withMultiple compression steel 50A plurality of inner circumferential compressive steel members 51 disposed on the inner circumferential side in the radial directionA plurality of outer peripheral compressive steel members 52 disposed on the outer circumference sideHas at least one ofMultiple compression steel 50It has a thickness equal to or greater than that of the distributing muscle 40 in the radial direction.Diagram