A significant dip (2″ deep) had developed Runway 1L/19R at Andrews Air Force Base, Maryland. An engineering investigation revealed the settlement was caused by water infiltrating the pavement system and transporting soil particles through a leaking culvert underlying the runway. The settlement presented operational problems, particularly for small aircraft.
Location: Andrews Air Force Base, Maryland
“Samples excavated in December 2010 during a runway keel replacement project was still intact after 11+ years of service.”
Runway 1L/19R is the primary runway for Air Force One. Disruptions to this runway cause far-reach impact. Consequently, U.S. Air Force engineers sought an alternative to reconstruction. URETEK USA provided an alternative that minimized runway downtime, security concerns, and upheaval of the President’s schedule. In addition, URETEK USA delivered a solution that conservatively cost 50% than reconstruction.
URETEK USA's Solution Involved 5 Elements:
- Initial Slab Lifting Using High-Density Polyurethane
- URETEK Deep Injection® (UDI) Soil Stabilization: This unique process relies on a two-part polymer system, injected beneath the concrete through pre-drilled holes of 5/8-inch diameter (penny-size). The polymer system travels through tubing to elevations beneath the pavement surface characterized by weak soils (determined by cone penetration testing).
- Expansion of the polymer compacts the surrounding soils – eliminating voids in the soil mass and improving bearing capacity.
- Leaking Culvert Repair by Injecting Resin (from inside the culvert)
- Final Slab Alignment Using High-Density Polyurethane Pavement Joint and Crack Sealing Using Urethane Caulk
URETEK USA, Inc.
The URETEK team includes industry experts who bring decades of practical engineering, geotechnical, chemical, construction and pavement experience to our projects.