安全性向上を目指したトンネル内送気用吹出ダクト形状の検討について

抄録

Following the ceiling panel collapse accident in Sasago Tunnel, NEXCO-Central is putting more effort into preventing the recurrence and improving safety. This paper introduces one example of a study to improve the safety of shaft air supply-exhaust type outlet ducts. This study offered multiple proposed improvements to the structure of ducts and performed a comparative study including evaluation of wind conditions in a tunnel by CFD analysis and in-site testing.