| 摘要 |
PURPOSE:To smoothly adjust leveling by lessening the effect of leveling adjustment on the other portion by a method in which a supporting arm is projectionally provided on the inside of the upper part of a supporting arm set on the opening edge of an excavated pit, and a reinforcing bar cage is hung down on the tip of the supporting arm. CONSTITUTION:A supporting frame 3 is fixed to the opening edge of an excavated pit 1, and a plurality of brackets 6 are erectly provided on the frame 3. Supporting arms 5 are thrust through, the brackets 6 and projectionally set on the frame 3, and a reinforcing bar cage 7 is hung down on the tip of the arms 5. For regulating the level of the cage 7, the vertical angles of the arms 5 are adjusted. The weight of the supporters of the cage 7 can thus be reduced, and the level of the cage 7 can be regulated on each of the supporters. Therefore, the effect of the level regulation on the other portions can be lessened, and the level regulation can be smoothly performed.
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