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Gas System Repair Patterns in San Francisco Resulting from the 1989 Loma Prieta Earthquake

by Douglas G. Honegger, EOE Engineering Inc, Costa Mesa, United States,



Document Type: Proceeding Paper

Part of: Lifeline Earthquake Engineering

Abstract:

Leak repair calls in San Francisco were tracked immediately following the 1989 Loma Prieta earthquake. This information was subsequently obtained from PG&E and examined for possible correlation with other geologic, seismic and structural information. Repair data was mapped with recorded peak ground acceleration, Modified Mercalli Intensity, building damage, near surface soil types, and locations of liquefaction. Results obtained from this type of data representation are qualitative but provide a convenient format for examining the various types of information. The mapping indicates that soil characteristics are the most important indication of where damage can be expected.

Subject Headings: Soil liquefaction | Soil gas | Pipe leakage | Earthquakes | Soil properties | Gas pipelines | Soil-pipe interaction | California | United States

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