PEDESTRIAN TUNNELS
APPLICATION
The primary intent of an underpass is to eliminate at-grade pedestrian congestion for vehicles 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.
CASING/PIPE MATERIAL
CIRCULAR TUNNELS
Steel Casing – typical diameter of 10′ to 14′.
Reinforced Concrete Pipe (RCP) – typical diameter of 12′ I.D. / 14′ O.D.
BOX TUNNELS
Precast Concrete Box Segments (PCBS) – typical square dimension of 10′ I.D. / 12′ O.D.
CIRCULAR TUNNELS
BOX TUNNELS
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