| 摘要 |
PROBLEM TO BE SOLVED: To provide a framework device which can prevent the lowering of quality by suppressing the generation of a clearance between lining concrete and an invert form, and a construction method of the lining concrete.SOLUTION: A framework device 1 of lining concrete C which is constructed on an inner wall Ta of a tunnel T comprises: a form group 2 having at least a side form 4 and an invert form 5; a hinge structure 6 which joins the side form 4 and the invert form 5; a fixing jack 10 which is joined to the side form 4 and the invert form 5, can be elongated and contracted, and can impart tensioning forces to the side form 4 and the invert form 5; and a tension rod jack 20 which is connected to the side form 4 and the invert form 5, can be elongated and contracted, and can impart tensioning forces to the side form 4 and the invert form 5 in a state that the tensioning force is imparted by the fixing jack 10.SELECTED DRAWING: Figure 2 |
