
- 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.