| 摘要 |
PURPOSE: To improve efficiency in execution of work by a method wherein processes including pushing-up of a form device with ascending/descending jacks, supplementing with first support blocks, contraction of the jacks and supplementing with second support blocks are repeated successively. CONSTITUTION: After a form device 1 for girders is pushed straightly upward with expandable/contractile rods 8a of ascending/descending jacks 8 expanded upward, first support blocks 7 for initial installation are laid on a concrete foundation C and fixed to the form device 1. Then, the expandable/contractile rods 8a are contracted, and after second support blocks 9 for initial installation are installed, the blocks 9 are fixed to the rods 8a. After the form device 1 is pushed up with the expandable/contractile rods 8a expanded, the blocks 7 are laid newly on the foundation C and the blocks 7 are connected with one another. After the expandable/contractile rods 8a is contracted, the blocks 9 are laid newly on the foundation C and the blocks 9 are connected with one another. The blocks 7 and the blocks 9 are piled up similarly and connected with one another alternately, and after the form device 1 is pushed up to the upper end between the girders, forms 2 are arranged. |
