Construction girder and construction method of construction girder

摘要

PROBLEM TO BE SOLVED: To provide a construction girder and an erection method thereof, capable of installing a sleeper in an optional position.SOLUTION: A construction girder 1 is installed under tracks 50 and 50, and supports the tracks 50 and 50. The tracks 50 are constituted of a track bed 51 formed of ballast, the sleeper 52 arranged on the track bed 51 and a rail 53 arranged on the sleeper 52. The construction girder 1 comprises a box girder 11 being a box shape of opening an upper surface 11a and storing the ballast. The ballast stored in the box girder 11 forms at least a part of the track bed 51.