|Structure name||Twin Harp Bridge|
|Structure type||PC 3-span continuous cable‐stayed bridge|
|Structural factors||Length of bridge 280.0m
Span length 69.4+140.0+69.4m
|Client||Asahikawa Deparement of Public Works Management, Kamikawa General Subprefectura,lHokkaido Goverment|
|Contractor||Joint-venture group Sumitomo Mitsui Construction Co.,Ltd・Kajima Co・DPS Bridge Works Co.,Ltd・Nippon High strength Concrete Co.,Ltd|
|Route name||Nunber 1 line Kanjo , 3.3.11 City planning road.|
This bridge is a cantilever PC box girder structure with independent single towers in consideration of the falling snow and surrounding landscape. The main girder is flexibly supported on the piers and the main tower is rigidly connected to the piers through an opening provided in the main girder. In addition, the inertial force at the time of earthquake is directly transmitted to the pier by a stopper. The construction featured improved work efficiency of the main girder during the overhanging construction method by devising a method to collectively tension a large number of strands using a large center hole jack with a capacity of 800tf.
This bridge was awarded the 1991 Prestressed Concrete Engineering Association Prize.