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Tales From Milwaukee's Underground

by Paul Tarricone, Asst. Editor; Civil Engineering Magazine, ASCE World Headquarters, 345 East 47th Street, New York City, NY.,


Serial Information: Civil Engineering—ASCE, 1990, Vol. 60, Issue 1, Pg. 50-53


Document Type: Feature article

Abstract:

Written from RETC papers and interviews, this article is a status update on the Milwaukee Metropolitan Sewerage District's $2.1 billion Water Pollution Abatement program, which is now in its 11th year. The article includes case studies of several of the 340 tunnel projects and some of the obstacles encountered in those specific projects. Many of the tunneling projects share common problems: ground water control without the luxury of dewatering, unstable soils and constrictive job sites with traffic problems, city landmarks, delicate building foundations, and noise level restrictions. One case study features the rescue by crane of a stranded tunnel boring machine, which inexplicably sank while boring. Two others feature ground water control techniques through ground freezing, and by upgrading the tunnel's water handling, pumping and treating systems. Another case study discusses the innovative combination of TBM and single pass, precast concrete segmental lining.

Subject Headings: Case studies | Project management | Water pollution | Urban areas | Tunnels | Precast concrete | Boring | Wisconsin | United States

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