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World Trade Center Station - South Boston Piers Transitway

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Service:
Waterproofing design and supervision
Estimated cost: Commencement:
December 30, 1996
Completion date:
October 22, 1998
Location:
Boston, MA
United States
Technical data:

PVC membrane waterproofing for 150 ft (64 m) of Cut & Cover tunnel, an open cut station and 300 ft (91 m) of boat section. Waterproofing details for over 400 foundation piles and 380 conduit penetrations in groundwater were developed.

Geology description:

Silty sand overlaying moderately plastic, organic silt to 18 ft (5.5 m). Below this, layers of uniform fine grey and yellow brown sand and silty sand to a depth of 39 ft (12 m), beneath which is moderately plastic, medium stiff olive grey clay. High water table.

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