SECONDARY LINING CONSTRUCTION METHOD AND FORM DEVICE FOR SECONDARY LINING

摘要

PROBLEM TO BE SOLVED: To provide a secondary lining construction method and a form device for a secondary lining construction method, not causing a difference in level in a construction joint between lining layers.;SOLUTION: This form device 10 includes: a movable form board 12 and a side board 14. The form plate 12 is assembled to be annular along the inner peripheral surface of a segment 16, and contracted inward from the annular state in moving. Both ends i the longitudinal direction of the form plate 12 are provided with a pair of first and second separating forms 20, 22. When the movable form plate 10 is moved, one separating form 20 is left behind in the rear end part of a preceding secondary lining layer A, and after the form plate 12 is moved, it is fixed to the front end side. After the movable form plate 10 is moved, the other separating form 22 is fixed to the rear end side of the movable form plate 12 through a spacer 24. The spacer 24 is interposed between the movable form plate 12 and the second separating form plate 22, and formed tapered to be gradually decreased in thickness as it goes toward the outside.;COPYRIGHT: (C)2005,JPO&NCIPI