Tunneling

University Link Light Rail U230

University Link Light Rail U230

Scope

Michels Corporation was part of an integrated joint venture responsible for executive management field supervision and engineering on the Central Puget Sound Regional Transit Authority's University Link Light Rail Extension Project. The project extends light rail service from Capitol Hill to downtown Seattle and the airport. Michels' scope of work included the excavation and installation of twin precast concrete segment tunnels. Each of the tunnels are approximately 3,800 linear feet, and 18'10" in diameter. They were excavated to depths ranging from more than 13 feet to less than 18 feet, where they crossed underneath Interstate 5. Nearly the entire tunnel alignment consists of horizontal and vertical curves with the tightest curve radius being only 550 feet.

Projects

Michels designed and built an Earth Retention System to provide global stability for a recreational and ski hill that had been experiencing multiple slope failures.

Earth Retention Systems

Mont Du Lac

Wisconsin

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Mont Du Lac

Michels' system took the weight of Colman Hall at the slope and put it onto 18 micropiles that extended 60 feet below grade.

Earth Retention Systems

Colman Hall

Wisconsin

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Colman Hall

Michels Corporation completed a deep foundations package for a rail bridge to carry the Rock Island Metra tracks over tracks used by Amtrak and freight trains, eliminating at grade crossings.

Earth Retention Systems

Metra Flyover Bridge

Illinois

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Metra Flyover Bridge

Michels performed inbound and outbound structure construction.

Earth Retention Systems

Lake Shore Drive

Illinois

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Lake Shore Drive

Michels constructed a temporary earth retention system, excavated the work area, and installed 218 micro piles under Milwaukee City Hall.

Earth Retention Systems

Milwaukee City Hall Foundation Restoration

Wisconsin

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Milwaukee City Hall Foundation Restoration

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Thor Heyerdahl

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