| 摘要 |
A corrosion-proof sheet installing device for installing a corrosion-proof sheet, having dispersedly projecting anchors and being used to cover the inner surface of lining concrete of a tunnel, in a large-diameter arch center, the device comprising a foldable/expandable sheet lift so structured as to spread from the center axis toward the periphery thereof when expanded to provide a size almost identical to the outer peripheral size of the arch center and a height almost identical to that of the same, and a means for expanding the sheet lift, thereby easily installing the corrosion-proof sheet in the arch center when a large-diameter tunnel is constructed. |
