Project Challenges
• Ferry dock slab was undermined by wildlife causing significant void conditions to form
• Voids Ranged from 6” to 1’ throughout the entire 44’ x 24’ slab
• Ferry dry dock maintenance repairs were scheduled earlier than normal to ensure the repair could be completed
• Potential for service interruption was imminent
Design Approach
• Utilize EL003 Polymer to remediate the slab in the identified void areas
• This involved drilling 1/2” holes at the injection locations and inserting a 1/2” rod to the appropriate depth
• Afterward, injected structural polyurethane to compact, void fill, and stabilize the support soils
Project Support
• EagleLIFT was the General Contractor
• Design was a collaborative effort between the DOT4 regional engineer and EagleLIFT
• Voids were identified by Ground Penetrating Radar (GPR)
Results
• Stabilized the dock in 3-shifts
• Minimized the downtime of the dock and restored service in one day
• Stabilized all voids throughout the slab, regaining required weight-bearing capacity and stability
• Worked in coordination with a drydock schedule
