Two westbound lanes of LA 14 collapsed in 2001 over a 22-in. high-pressure gas line near the Erath Bypass in Vermilion Parish, La. The Louisiana Department of Transportation and Development (LADOTD) District 3 closed the two lanes, tore out the failed concrete, excavated the existing soils to a depth of 12 ft, installed and re-compacted new backfill and base material and re-poured the concrete. The westbound lanes were closed for six weeks while this work was done. The project cost was $60,000.
In early 2002, LADOTD discovered that the eastbound side over the same pipeline was showing symptoms similar to the 2001 situation. Unwilling to repeat the expense,
URETEK USA, based in Tomball, Texas, and represented in Louisiana by Mike Vinton proposed the patented URETEK Deep Injection Process, utilizing URETEK 486, a high-density, hydro-insensitive, expanding polymer. This unique material is environmentally neutral. The expanding material is injected through tubes directly into the weak soil zones and is equally effective in both trapped water and wet soils environments. By measuring and monitoring any surface movement, URETEK is able to demonstrate both proper densification of the zone as well as the precise lifting of pavement sections, where necessary.
The 22-in.-diam. high-pressure gas line was in a sloped trench, 12 ft deep, 16 ft wide (top), 6 ft wide (bottom), which was backfilled using site material.
The treatment was so effective and the results so complete that when LADOTD detected the same symptoms occurring in the other two eastbound lanes, URETEK USA was called back in early 2004 to repair these as well. The end result--all four eastbound lanes were completed using the URETEK process for half the cost, with total traffic disruption of only six days, instead of six weeks.
When you’re ready to control your soil stabilization and pavement lifting problems with a fast, cost effective, long-term and environmentally safe solution, go to www.uretekusa.com/locations to find your nearest URETEK USA representative or simply call us at 888/287-3835.