| 摘要 |
PROBLEM TO BE SOLVED: To provide a grade separation and its constructing method capable of shortening the period of no throughfare for the whole lanes into several hours. SOLUTION: Side-section girders 11a and 11b and printing sections 15a and 15b are formed on a road surface 5, and the side-section girders 11a and 11b are lifted by using a lifting device 31. A foundation 23 and a pier 33 are formed, using the lower sections of the side-section girders 11a and 11b as work yards while assembling a central-section girder 9, using the upper section of the side- section girder 11a as the work yard. End-section girders 13a and 13b are assembled, using the upper sections of the printing sections 15a and 15b as the work yards. The central-section girder 9 is pushed out from the side section 11a along a precedently pushed-out guide 37, and built to the pier 33. The end-section girders 13a and 13b and pushed out from the printing sections 15a and 15b, and built to the pier 35 and an abutment 19. COPYRIGHT: (C)2003,JPO
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