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Amtrak: Soil Stabilization for High Speed
Amtrak has implemented PRS Neoloy® geocells for soil stabilization on its high-speed rail corridor between Washington DC and Boston, which suffers from poor subgrade causing significant degradation. The geocells offer high elastic stiffness, low deformations, and high tensile strength, resulting in immediate installation benefits and long-term performance without the need for subgrade replacement. The solution has extended the maintenance cycle by seven times, leading to less maintenance and a quick return on investment.
Amtrak: Soil Stabilization for High Speed
- 1. Amtrak: Soil Stabilizationfor High Speed Rail Extends Maintenance Cycle by 7x.
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- 3. Washington DC/Boston NEis One of Amtrak’s busiest lines.
- 4. Suffers Poor Subgrade:significant mud pumping, track & ballast degradation of 60-70%
- 5. THE PROBLEM • Degradationof track geometry • Frequent tamping every 3-4 months • Speed limitations on “high-speed” corridor
- 6. Require very stricttrack geometry tolerances Track surfacing & tamping is costly and time-consuming High Speed Track Challenges
- 7. Other Solutions Considered MoistureBarriers Time Consuming, Not Effective Geogrids Limited influence HDPE Geocells High Creep upon Loading. Not fit for Long-Term, Load Support.
- 8. PRS Neoloy® Geocell Afterinvestigating a range of geosynthetics solutions Amtrak, FRA and HARSCO chose… THE SOLUTION
- 9. High Elastic Stiffness LowDeformations (Creep) High Tensile Strength Neoloy® Geocells Properties Provided the Best Performance Sustained for Long-Term
- 10. Amtrak Cross SectionDesign Neoloy Geocell + Sub- ballast Infill Ballast Layer Sub-ballast Layer Overfill Soft Subgrade
- 11. Fast Installation Immediate Results •NoSubgrade Replacement •Minimum Downtime •Results Noticeable Immediately •No Settlements after 1 Year
- 13. High Speed Track,High Standards Project Monitored and Evaluated by: • Amtrak – USA National Railroad • FRA – Federal Railway Administration • Columbia University • Harsco Rail Consulting Group
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- 16. With PRS NeoloyGeocells You’re On the Right Track