- Working in a tunnel presented multiple challenges in both logistical approach and maintaining the safety of the crew and public.
- Outage preparations
- Equipment mobilization
- Air quality control measures
Railroad Construction Company, Inc. (RCC) rehabilitated the 3,800 ft. double-tracked Camden Subway tunnel.
Outage preparations and equipment mobilizations occurred from a tightly-bound, single-track maintenance yard at one of the tunnel portals. RCC constructed a temporary access crossing at the opposite portal to better facilitate manpower and certain material mobilizations, including concrete deliveries.
With revenue train operations always maintained, the existing double-crossover at Way Interlocking was removed and replaced with a brand new installation, including replacement of the concrete-encased steel channel support structure, thermite welding and improvements to signal circuitry.
Over 9,500 SF of concrete spalling and surface breakout throughout the tunnel was identified and repaired, as well as 2,200 LF of concrete crack injection.
Structural steel repairs were completed, including the shoring, demolition and full replacement of multiple columns, and welding of reinforcing steel onto columns and overhead beams.
Lead paint abatement was conducted on structural members totaling 17,800 SF followed by the cleaning, priming and re-painting of those surfaces.