Our Works
Railroads Tunnel

Nabetateyama Tunnel

Location
Niigata
Completed Year
1995
Ordering
Japan Railway Construction Public Corp.
Construction
Railway tunnel (Hokuetsuhokusen)
Cross sectional area: 27 m2
Length: 9117 m
The geological conditions were expansive mudstone containing methane gas. The project suffered from high swelling pressure for 20 years.