| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressing mold of a segment main girder bending device, capable of changing and adjusting the curvature of a convex face of a distal end while the pressing mold is mounted in the bending device. SOLUTION: This main girder bending device 10 includes a bending work base 14, the pressing mold 15 used while it is mounted in the segment main girder bending device 10 and having the convex face 15a in the distal end, and rotary roller members 16 arranged in both of ends on a side face on the opposite sides to the pressing mold 15 of the main girder members 12. The convex face 15a of the pressing mold 15 is formed of many liner members 31 arranged continuously along the convex face 30a of a pressing mold body 30 and being attachable, detachable, and replaceable. By replacing these liner members 31 with liner members having different height h1 from that of the former members, the curvatures Ra, Rb, Rc of the convex face 15a having continuous outer side end faces of the liner members 31 can be changed to curvatures along a curved line of tunnel cross section on which the segment 11 is installed. COPYRIGHT: (C)2011,JPO&INPIT
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