Through Frozen Groundby Brian Fortner, Contributing Editor;
Serial Information: Civil Engineering—ASCE, 1999, Vol. 69, Issue 3, Pg. 34-39
Document Type: Feature article
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 | Frozen soils | Subways | Construction management | Transportation corridors | Bays | Mid-rise buildings | Ports and harbors | Russia | North America | Massachusetts | United States
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