| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an internal forming board for building a closed-loop concrete wall for a building of a cylindrical shape that can be constructed in a material-saving manner, the building having its cylindrical shape partially increased or decreased in a height direction thereof. <P>SOLUTION: The internal forming board has a closed-loop main portion 5 and a rising ring detachably attached to an upper edge of the main portion. The main portion is formed so that its upper peripheral edge is larger or smaller than its lower peripheral edge, and has a number of tie plates which are detachably connected together in a manner being circumferentially closed and terminated. Then at least one of the tie plates has a width that is increased or decreased in a height direction. Further at least one pressure absorbing ring 24 extends along side surfaces of the tie plates, on a side opposite to a concrete wall to be constructed, in a manner detachable from the tie plates. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
