Gokuraku Bridge is a concrete arch bridge which is under constructed in Toyama. The large-diameter inclined caisson type pile by NATM is adopted for the foundation of this bridge.
The steel-arch supports at bench were omitted by designing. And the adequacy of the tunnel supports was confirmed by three-dimensional FEM.
On excavation of the pile, the top heading and horizontal bench method was adopted and the inclined shaft equipment was improved for construction machines getting down to bottom by themseif.
