Bridge Approach/Departure Slabs

Rehabilitating bridge approach and departure slabs effectively without lengthy road closures.

Bridge Approach/Departure Slabs

“URETEK USA is committed to extending the life of your bridge approach and departure slabs with non-invasive, cost effective soil stabilization and pavement realignment solutions.”
Bridge approach and departure slabs often settle several inches or more causing potential unsafe driving conditions. The settled approach slab and highway pavement are impacted by cracking and stresses that either reduce the pavement life or require additional maintenance costs. Additionally the bridge itself is subjected to increased impact loading which is damaging to the structure. The settlement is most often caused by loose or poorly compacted foundation soils. The settlement can also be caused by water penetration under the slab and out under the abutment wall or wing walls, carrying soils out from under the slab.
Time Savings
  • 90% faster than competitive solutions
  • Project work completed in hours / days versus weeks / months
  • Fast installation, curing and cleanup
Minimal Disruption
  • Minimizes or eliminates work zone delays
  • Work often done during off peak night time hours
  • Crews dismantle and remove work zones as they finish daily
Cost Savings
  • Up to 75% less than replacement cost
  • 2-Year unconditional warranty against settlement
Predictable Results
  • 100,000 successful projects worldwide
  • Precision adjustment to 1/8″
  • Hydro- insensitive – displaces under pavement water
Safety
  • Clean, organized worksite
  • Professionally trained & certified employees
  • Environmentally safe, inert product
43
Average Age
United States Bridges

The Deep Injection Process

Perform Dynamic Cone Penetrometer (DCP) tests to determine the depth(s) of the weak soils. Bridge approach slabs that have sleeper support slabs shall have all drill holes fully sleeved by tubes into the base soils to prevent any injection of material between the sleeper slab and the pavement. To stabilize the sleeper slab, injection tubes shall be inserted to a minimum depth of 5′ (minimum of 2′ below the bottom of the sleeper slab) and then typically at a second elevation approximately 10′ below the pavement surface. Material shall be injected in each tube until the soils are stabilized as evident when movement of the pavement is detected. After the soil is stabilized beneath the sleeper slab, injection may be continued to lift the sleeper slab and pavement to original grade. Based upon the DCP tests, additional levels of injections may be required to provide adequate stabilization. Stabilization of the soils will provide proper support for the heavy sleeper slab to mitigate any future movement. If there is any concern over loss of soil beneath the abutment wall, a row of injection tubes shall be inserted to the proper depth(s) and material injected to stabilize the soils and to close off any pathways for water to travel that were carrying soils out from under the abutment wall.
URETEK USA, Inc.
The URETEK team includes industry experts who bring decades of practical engineering, geotechnical, chemical, construction and pavement experience to our projects.
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