Ground freezing was chosen to safely maintain stability, restrict groundwater inflow and limit settlement of the overlying structures to support hand–mining excavation.
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Frozen Earth Cofferdam Design
Structures designed to transfer storm runoff water from surface collector systems to deep large diameter tunnels pass through a variety of subsurface soils in the Milwaukee, Wisconsin area. During construction, problems developed relative to the use of conventional earth support systems. Ground freezing was selected for temporary ground support and ground water control…
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