INTERCEPTING DEVICE FOR INVERT CONCRETE

摘要

PROBLEM TO BE SOLVED: To effectively prevent a segment from rising by quickly intercepting an invert concrete when the invert concrete is placed. SOLUTION: This intercepting device 1 for invert concrete placed at the bottom of a tunnel T comprises an intercepting frame 2 having an arcuate lower end outer periphery along an inner peripheral surface F at the bottom of the tunnel T, a carriage 3 supporting the rear of the intercepting frame 2 and movable on the inner peripheral surface F in the longitudinal direction of the tunnel T, and a fixing means for fixing the carriage 3 to the inner peripheral surface F at a predetermined position. The fixing means has a supporting frame 65 fixed to the segment S with a bolt screwed to a nut for filling a grout of the segment S forming the inner peripheral surface F. The carriage 3 is connected to the supporting frame 65 by an extensible bar jack 64. COPYRIGHT: (C)2008,JPO&INPIT