| 摘要 |
PROBLEM TO BE SOLVED: To perform economical launching erection by shortening the length of a launching machine, without use of the launching machine, or by decreasing the height of a tower hung in an inclined manner, in a launching construction method.SOLUTION: In an erection method for a bridge, a main tower 108 protruded vertically upward from a part of a bridge girder 104 is erected in the part of the bridge girder 104 assembled in a field, and a front auxiliary tower 106 protruded vertically upward from a front part 104a is erected in the front part 104a of the bridge girder 104 on an erection-direction front side with respect to the main tower 108. A front rope 112a is laid in a tensioned state between a tip side of the main tower 108 and a tip side of the front auxiliary tower 106, and the bridge girder 104 is launched in the erection direction from a field assembling location 102b. |
