| 摘要 |
PROBLEM TO BE SOLVED: To mount a pedestal plate on a wall surface of an earth retaining wall to which the pedestal plate is not mounted in advance while ensuring cut-off efficiency from a flood in the case boring is made by a casing. SOLUTION: A doughnut plate like rubber packer 3 around an opening of the root of a guide pipe 2 is mounted to the rear side of a pedestal plate 1 mounting the guide pipe 2 for inserting casing pipe, etc. to the central part of the front side in the internal and external circumferential edges in a state capable of being sealed up, an injection hole 7 connecting to a space between the internal and external circumferences of the packer 3 is bored in the pedestral plate 1, and mounting holes for inserting mounting bolts holding slight shakinesses in them are bored in a plurality of positions on the periphery section of the pedestral plate 1. By the constitution, in the case anchor execution is carried out, the circumferential edge section of the pedestal plate 1 is brought into contact with H-shaped steel materials exposed to a wall surface of an earth retaining wall W at specific intervals or post-insert sections embedded and fixed to a wall surface of another earth retaining wall W, and the bolts are inserted into the mounting holes to make it possible to clamp and fix the pedestal plate 1 to earth retaining struts or shore struts or inserts through the bolts.
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