Arapahoe
Coal Handling Facility
TIC (The Industrial Company)
Englewood, Colorado
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Frozen-soil shoring system installed around the site.
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The owner, Public Service Company of Colorado, wanted to build a state-of-the-art railroad-coal-car unloading facility with an integrated radial stacker.
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Traditional shoring methods were considered and costed, but there were serious concerns about groundwater control.
- The owner was on the verge of abandoning this project when the general contractor, TIC, contacted us.
Frozen-soil shoring as excavation proceeds.
Lowest slab under construction near vertical frozen-soil shoring wall protected by insulation.
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A frozen soil shoring wall 500 feet in length was installed around the T-shaped site in wet sand, gravel, cobbles, and moving water.
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The wall was designed to a thickness of 4 feet and a depth of 33 feet to resist the 24 feet of hydrostatic pressure against the 26-foot excavation.
- Groundwater was held at a level below the bottom of the excavation with the support of a few sump pumps.
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