Cementing the Future

by David J. Berti, P.E., Principal; Jacobs Assocs., San Francisco, CA,
Demetrious C. Koutsoftas, P.E., Principal; Dames & Moore, San Francisco, CA,
Eric S. Lindquist, P.E., Assoc.; Jacobs Assocs., San Francisco, CA,

Serial Information: Civil Engineering—ASCE, 1998, Vol. 68, Issue 12, Pg. 46-48

Document Type: Feature article


One of the most devastating effects of the Loma Prieta Earthquake that rocked northern California on Oct. 17, 1989 was the collapse of the elevated Cypress Freeway (Interstate 880) in Oakland. Contract B presented some of the biggest challenges during reconstruction. Caltrans moved the freeway westward into a less-populated area, lowered Seventh Street and made modifications to the adjacent Bay Area Rapid Transit (BART) structure, an aerial viaduct that carries commuters between the east bay and San Francisco each day. Despite difficult ground conditions and rigid construction requirements, the engineers completed the project on time and within budget, using several unique in situ soil-cement mixing techniques.

Subject Headings: Rapid transit systems | Highways and roads | Bays | Viaducts | Streets | Soil cement | Project management

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