Baltimore's Got the Subway Everyone Loves

by Ann E. Seltz-Petrash, Asst. Editor; CIVIL ENGINEERING—ASCE New York, N.Y.,

Serial Information: Civil Engineering—ASCE, 1981, Vol. 51, Issue 1, Pg. 42-45

Document Type: Feature article

Abstract: Some of the innovations of Baltimore's 13.5-mile subway system are explored. The system, on which construction began in 1976, is under budget and on time. The first 7.5-mile section will open in 1982. Innovations on the system include: enlightened contract writing, with minimal use of exculpatory language; extensive use of geotechnical data, including sharing it with contractors; and extensive use of slurry walls, compaction and chemical grouting to cut underpinning costs.

Subject Headings: Contracts | Grouting | Innovation | Linings | Subways | Tunneling | Tunnels | Urban areas |

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