Deep Foundations

Juneau Town Substation

Juneau Town Substation

Scope

Michels, one of North America’s largest deep foundations contractors, built a secant pile structure for an underground power substation at the base of a multi-use building in the city's historic Third Ward.

 

The project included construction of 214 30-inch secant shafts ranging in depth from 70 to 105 feet as well as installation of 200 10 3/4-inch driven pipe piles to an estimated depth of 120 feet. A waler system was placed and welded within the secant structure before it was excavated down 17 feet through contaminated soil and urban fill.

 

The contaminated soils required special inspection, handling and disposal to ensure no cross contamination was to occur. Following excavation,  Michels deep foundations contractor crew improved the entire subgrade with geotextile fabric and two feet of granular base.

 

The work was completed on a 140-foot by 140-foot site in downtown Milwaukee. Coordination and logistics were critical to the project's success.

  • Michels, one of North America's largest deep foundations contractors, built a secant pile structure for an underground power substation at the base of a multi-use building in the city's historic Third Ward.
  • The project included construction of 214 30-inch secant shafts ranging in depth from 70 to 105 feet as well as installation of 200 10 3/4-inch driven pipe piles to an estimated depth of 120 feet.
  • A waler system was placed and welded within the secant structure before it was excavated down 17 feet through contaminated soil and urban fill.
  • The contaminated soils required special inspection, handling and disposal to ensure no cross contamination was to occur.

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Michels built 458 secant piles and 100 caissons in 90 days for a 10-story, 600,000-square-foot building on the site of the new McDonald's corporate headquarters.

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110 N Carpenter

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Michels installed 53 caissons in Massachusetts.

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Michels installed 36 transmission line caisson foundations that were between 6-7 feet in diameter and 30 feet deep in hard rock conditions.

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W175 Transmission Line

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Yesler Terrace

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Vince Lombardi

Great teamwork can do great things.

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