| 摘要 |
The present invention relates to a method for continuously constructing girders in a section with irregular spans including (a) a step of loading the girders on a trailer and transferring the girders to a field; (b) a step of installing a temporary structure on the outer side of one side of a pier in the width direction of a bridge, fixing and installing a guide beam in the width direction of the bridge on the upper side of the temporary structure, and installing a carry lift having two trolleys moving along the guide beam and a roller on the lower part; (c) a step of lifting the transferred girders using the trolleys of the carry lift; (d) a step of hanging the transferred girders on the trolleys of the carry lift along the guide beam and seating the girders in a space between the piers by turns; (e) a step of installing the first girder in the width direction of the bridge and a movable runway rail in the longitudinal direction to move the roller of the carry lift by being seated between the first girder and temporary structure; (f) and a step of moving the carry lift in the longitudinal direction of the bridge along the runway rail when the runway rail is installed in the prior step (e) and installing the girders in the width direction of the bridge by performing the (c) or (e) step. The present invention is capable of easily installing the girders even though the spans of the bridge are irregular by moving the carry lift formed on the upper side of the temporary structure along the beam or rail in the width direction and longitudinal direction of the bridge to be constructed. In addition, the present invention obtains an effect of safely constructing the bridge without affecting to the operation of vehicles or railway vehicles in the lower side as a large crane and a large structure are not necessary. |
