Application
The primary intent of an underpass is to eliminate at-grade pedestrian congestion for vehicle, and other motor traffic, thereby improving safety at railroad crossings and major intersections. The tunneling method allows the steel casing to be installed without taking mainline track or major roadways out of service.
Pipe Material
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Circular Tunnels - click for project photos.
Steel Casing - typical diameter of 10' to 14'.
Reinforced Concrete Pipe (RCP) - typical diameter of 12' I.D. / 14' O.D. -
Box Tunnels - click for project photos.
Precast Concrete Box Segments (PCBS) – typical square dimension of 10' I.D. / 12' O.D.