Orderer INPEX Corporation
Completion 2016/2015
Structure and scale Pipeline, slurry pressure shield: outer diameter: 2,270mm, length: 1,661m, sludge propulsion: φ800mm, L=70.9m, φ1000, L=126.4m
NATM (rail method): excavation cross-section: 10m², tunnel length: 1,581m
Location Toyama Prefecture
Application Pipeline

Kumagai Gumi was responsible for tunnel construction in Asahi Town, Shimonikawa County on the shield section and propulsion section in Toyama City of a natural gas transportation pipeline (total length: 103km) that links Itoigawa City and Toyama City in Niigata Prefecture.