Abstract
For construction of a bridge, under which traffic is congested, the incremental launching method is advantageous, as a clearance space under the girder can be safely assured to the limit of the road construction law. The Nakatsu Bridge was constructed by the use of the incremental lauuching method with distribution of horizontal reaction, and in the form of three span continuous concrete box girder (46 x 56 x 46 m), crossing over a national road.
We developed specific shoes which are combined with actual shoes and provisional shoes. By the use of the shoes the bridge was constructed, and during the works the characteristics of the method including distribution of vertical reaction and true vertical reaction in comparison with the designed reaction, were checked.
