| 摘要 |
PURPOSE: To construct a bridge girder safely by a compact facility efficiently by using PC concrete blocks. CONSTITUTION: A plurality of hoists 2 are installed to an erection service car 1 movably mounted on previously constructed the concrete blocks, and a new PC concrete block (a) is hung up by the hoists 2 through a parallel shifter 3 fixed onto the block (a). The block (a) is pulled in and moved while taking reaction in the section of the parallel shifter 3 under the state, in which the rear end of the new PC concrete block (a) is faced at the front end of the previously constructed concrete blocks A, and both blocks A, (a) are clamped by PC steel rods under the state, in which the end faces of both blocks A, (a) are abutted. |
