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Through Frozen Ground

by Brian Fortner, Contributing Editor; Civil Engineering Magazine, ASCE World Headquarters, 1801 Alexander Bell Drive, Reston, VA.,


Serial Information: Civil Engineering—ASCE, 1999, Vol. 69, Issue 3, Pg. 34-39


Document Type: Feature article

Abstract:

The most difficult section of the Massachusetts Bay Transportation Authority's (MBTA) Silver Line transit corridor project is approximately 112 m (400 ft) of tunnel below Russia Wharf, which supports three seven-story buildings listed in the National Register of Historic Places. To minimize damage to the buildings, MBTA will use the new Austrian tunneling method; selective underpinning; ground freezing to temporarily support building loads and prevent groundwater infiltration; and spiling at the tunnel face beneath a 12 m (40 ft) long, grade-supported concrete slab foundation. The agency is spending about $35 million to build the tunnel section, which is scheduled for completion in March 2001..

Subject Headings: Tunnels | Buildings | Subways | Frozen soils | Underpinning | Tunneling | Transportation management

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