Gwynedd Train Station
Challenge
SEPTA (Southeastern Pennsylvania Transportation Authority) had settlement issues on two rail lines at a road crossing located in Ambler, Pennsylvania. The 14” thick concrete slabs supporting the track had settled in areas as much as 1-7/8” inches. For passenger trains, safely navigating this area of the tracks required a 40 mile per hour reduction in speed when driving. SEPTA’s main concernwas for the safety and convenience of their passengers, as continued settlement could lead to derailment. Additionally,minimizing the disruption to train schedules during repairs would require keeping one of the 2 tracks in service at all times. Slab replacement was not as option due to the expense, time and disruption it would cause to both street traffic and SEPTA trains. There were 2 previous attempts to lift the settled rail slabs with mudjacking, however they were not precise and were prone to washouts over time.Solution
SEPTA chose Quality 1st Basement Systems and the PolyLEVEL Polyurethane Injection System to resolve the problem.For more information about this project and the PolyLEVEL System visit: http://www.quality1stbasementsystems.com/about-us/case-studies/1192-gwynedd-train-station.html
SEPTA (Southeastern Pennsylvania Transportation Authority) had settlement issues on two rail lines at a road crossing located in Ambler, Pennsylvania. The 14” thick concrete slabs supporting the track had settled in areas as much as 1-7/8” inches. For passenger trains, safely navigating this area of the tracks required a 40 mile per hour reduction in speed when driving. SEPTA’s main concernwas for the safety and convenience of their passengers, as continued settlement could lead to derailment. Additionally,minimizing the disruption to train schedules during repairs would require keeping one of the 2 tracks in service at all times. Slab replacement was not as option due to the expense, time and disruption it would cause to both street traffic and SEPTA trains. There were 2 previous attempts to lift the settled rail slabs with mudjacking, however they were not precise and were prone to washouts over time.Solution
SEPTA chose Quality 1st Basement Systems and the PolyLEVEL Polyurethane Injection System to resolve the problem.For more information about this project and the PolyLEVEL System visit: http://www.quality1stbasementsystems.com/about-us/case-studies/1192-gwynedd-train-station.html
The 14” thick concrete slabs supporting the track had settled in areas as much as 1-7/8” inches.
PolyLEVEL - a structural grade polymer compound is being injected under the slab to lift it.
The slab is back into its original position.
The tracks are back in operation,
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Frequently asked questions
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