ABEL RECON

PennDOT Storm Drain Rehab

Drainage System Structural RehabilitationPennsylvania Department of Transportation;  Mansfield, PA Storm Drainage System, Structural Rehabilitation

 

The Pennsylvania Department of Transportation’s responsibility of keeping the public safe in travel is more than what meets the eye. Underground infrastructure is under constant strain due to static loads and dynamic loads causing various modes of deterioration over time. Static loads are in the forms of ground water pressures and earth compaction or movement. Dynamic loads can be in the form of vehicular traffic above.

 

In addition to these types of forces exerting strain on the physical properties of underground storm water structures there is compounding corrosion and abrasion to the structure’s material due to the constant water flows they carry. A potential result of a buried structure in a fully deteriorated mode, for instance, could lead to collapse of a pipe and an ensuing sink hole in the road surface above. In a recent road resurfacing project located in Mansfield Borough, PA, PennDOT faced all the above challenges and more. Mansfield, a small Victorian town located in the picturesque mountains of North Central Pennsylvania has few options for traffic diversion. A scheduled resurfacing of a state route intersecting the main artery for traffic would first require the roads storm water collection pipes that had exceeded life expectancy to be addressed. The failing storm pipes run parallel and in close proximity to a borough owned water main that ran the risk of damage if disturbed by open trench excavation in that immediate area. All options were evaluated and ultra-violet light Cured-In-Place-Pipe lining (a structurally independent pipe cured main line within the host pipe) was chosen as the best solution.

The Mansfield, PA storm pipe lining project consisted of consecutive segments of multiple size large diameter corrugated metal pipe ranging in size from 15” to 36”diameter. A general assessment of the condition of all segments of pipes in the project showed severe deterioration due to corrosion, with a majority of the pipe bottoms completely missing. Abel Recon installs a slip sheet along the entire pipe length for the purpose of spanning the missing pipe invert and protecting the liner from snags and cuts of the damaged metal pipe during insertion. The Reline America UV CIPP was inserted, inflated with air to expand inside the host pipe, conforming tightly to the profile, and cured utilizing an ultra-violet light train. By specifying the trenchless pipe rehabilitation process of UV cured-in-place pipe lining, the problems associated with open-cut excavation and total replacement of the failing storm pipes were eliminated. The risk of digging in close proximity to the Borough’s underground utilities and disruption to the community was avoided.

During the two weeks needed to complete Abel Recon’s UV CIPP lining project, commuters were kept moving through the work zone using minimal traffic control and were virtually unaware that this underground work was taking place. “With increasing demand placed on repairing storm water collection structures with tighter budget restraints, and public intolerance for disruption to their daily travels, I expect PennDOT to look more to this technology as we move forward” a local Department of Transportation official noted. The utilization of the advanced technologies in process control monitoring and fast curing capabilities of Reline America’s UV cured fiberglass lining system gave Abel Recon the tools to complete the project well within the timeframe required.