| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lining device capable of being easily installed in/removed from an opening of a ditch, and an installation method and a removal method for a covering plate of the lining device. <P>SOLUTION: A lining device 39 for closing an opening of a ditch formed in ground includes: a lining bearing girder 50 which is installed at the peripheral edge of the opening of the ditch; a covering plate 40 which is installed in the upper portion of the lining bearing girder 50 to close the opening of the ditch and which has a plurality of casters 45 provided to be capable of protruding from/receding into an undersurface; and a jack 55 which is provided in the lining bearing girder 50 and which can push up the covering plate 40 upward. <P>COPYRIGHT: (C)2013,JPO&INPIT |
