Grade separation application manner, grade separation and portable firing base

摘要

PROBLEM TO BE SOLVED: To provide a construction method of an overhead crossing and the overhead crossing capable of shortening the term of work by simultaneously performing foundation work and girder production.;SOLUTION: A ramp part girder 11 is made on the working deck 17 of a fixed frame 5 and the working deck 19 of a moving frame 9, and the working frame 19 is raised by use of a lifting jack 15 to replace the dead weight of the ramp part girder 11. The moving frame 9 is then floated by injecting water to the caster bag 31 of a water caster 13 and a pressure chamber 35, and then drawn and moved by a tire shovel or the like to between temporary frames 7. The working deck 19 is lowered by use of the lifting jack 15 to replace the dead weight of the ramp part girder 11 to the temporary frames 7, and the girder is temporarily set thereon. Thereafter, the moving frame 9 is moved again between it and the fixed frame 5, and a central part girder 25 is produced on the working deck 17 of the fixed frame 5 and the working deck 19 of the moving frame 9. In parallel to the production of the ramp part girder 11 or the central part girder 25, a bridge pier 23 is built and constructed in a foundation 23, and lifted up.;COPYRIGHT: (C)2004,JPO