SEGMENT STRUCTURE HAVING ISLAND-TYPE SHEAR KEYS AND LONGITUDINAL STRANDS FOR SHIELD TUNNEL

摘要

Provided is a segment structure having island-type shear keys in a drilling direction of a shield tunnel and longitudinal strands for the shield tunnel which is able to secure a certain shear force by the island-type shear keys without forming a longitudinal bolt box; and is able to improve construction speed by allowing the island-type shear keys and the inserting holes of the shear keys serve as a guide to reduce construction errors in a fastening process of the island-type shear keys of the segment structure in the next row. The segment structure comprises: a segment main frame (110) formed to have a certain curvature radius to become part of a ring shape as a unit segment of a segment ring forming each row of the shield tunnel; two island-type shear keys (120) formed in the island type not to be exposed to the outside when the segment structure (100) and the segment structure of the next row are fastened in a longitudinal direction, and placed with a certain interval on one side surface in the longitudinal direction of the segment main frame (110); shear key inserting holes (130) formed with a certain interval on an other side surface in a longitudinal direction of the segment main frame (110) for the island-type shear keys of the segment structure of the next row to be inserted and fixated; strand penetrating holes (140) formed respectively on both sides of a center, and both ends in a longitudinal direction of the segment main frame (110); and strands (150) inserted in a longitudinal direction, which is the drilling direction of the tunnel, through the strand penetrating holes (140).;COPYRIGHT KIPO 2016