Extradosed Prestressed Concrete Bridge with High-Strength Concrete, Japan—Yumekake Bridge

The Yumekake Bridge is an extradosed prestressed concrete bridge over the Kumano River in a steep ravine located near the UNESCO World Heritage Site of Sacred Sites and Pilgrimage Routes in the Kii Mountain Range in Japan.This bridge is the nation's first extradosed prestressed concrete bridge with high-strength and self-compacting cast-in-place concrete having specified design strength of 60 MPa for the tower and the box girder. The high-strength materials are also employed for the piers. This solution ensured slenderness and seismic resistance. The special features of the bridge are reported in this paper.