|①PC 3-span continuous box girder bridge、②PC 3-span continuous hinged rigid-frame box girder bridge
③PC 3-span continuous box girder bridge
|Length of bridge 928.0m
Span length ①3＠63.3ｍ、 ②100.0+165.0+100.0m、 ③（3＠61.3ｍ）×2
|Obihiro Development and Consutruction Dept.,Hokkaido Regional Development Bureau
|①DPS Bridge Works Co.,Ltd
②Joint-venture group DPS Bridge Works Co.,Ltd・ P.S. Mitsubishi Construction Co.,Ltd
③Joint-venture group Nippon High strength Concrete Co.,Ltd・Sumitomo Mitsui Construction Co.,Ltd・ IHI Construction Service Co.,Ltd
Toyokoro town～Urahoro towm
|Number 336 of national highway
This bridge was constructed about 4 kilometers upstream from the mouth of the Tokachi River in order make the bridge length as short as possible while considering the terrain. The main span is a PC non-uniform section continuous box girder, and the side span is a PC uniform section continuous box girder type. These shapes were selected considering future maintenance management, such as resistance to salt damage from the nearby ocean, early spring snowmelt flooding in the river, and construction constraints.
During construction, two sets of three spans of continuous box girders (3 at 63.3 meters) from the abutment A1 of the side span unit and three spans (3 at 61.3 meters) from the abutment A2 were constructed by the extrusion method, while three spans of continuous box girders in the main span were constructed by the overhanging erection method.