Charlestown Dry Dock

Project Overview

AK Industrial Services performed Ultra-High-Pressure (UHP) hydrodemolition of the wing walls at Old Ironside Drydock in Charlestown, Massachusetts.

Key Challenges

  • Protecting a nearby historic caisson from damage, asĀ a significant amount of the work took place next to the USS Constitution Museum.
  • Close proximity of the caisson, a very tight inside corner and an arching sloped wall
  • Sloped concrete walls (making hydrodemolition challenging)
  • Inside corner required 24ā€ deep hydrodemolition
  • Working in a small area with the mechanical demo contractor

Services Performed

Within 10′ of the caisson all floors and walls had to be 100% hydrodemolition: 10ā€ in general and 24-26ā€ at the location for the new caisson to be installed.

For the rest of the dry dock, mechanical demolition was performed, but hydrodemolition was used for the first 8ā€ and the last 2ā€. This was because the design engineer wanted:

  • To mitigate micro cracking
  • To provide a hightly bondable profile with the existing concrete
  • To ensure that all unsound concrete was removed

Successful Results

  • Provided an excellent bonding surface for the new concrete
  • Removed unsound concrete at areas where there had been large cracks and great deterioration
  • Finished ahead of schedule ā€“ before the concrete was ready for placement
  • Eliminated all dust, unlike the dust created from the mechanical demolition

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Markets Served

  • Buildings
  • Civil & Infrastructure
  • Industrial
  • Marine
  • Power
  • Member

    • Contact

        AK Industrial Services LLC

      • 617.884.9252
      • 347 Third Street
      • Everett, MA 02149
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