Because records from carefully instrumented liquefaction sites are one of the most urgent needs in geotechnical earthquake engineering, the U.S. Geological Survey established and instrumented a liquefaction site in southern California in 1982. The first records from this site--known as the Wildlife site--were produced after the November 1987 Superstition Hills earthquake, tracing ground motions and pore pressures through the entire liquefaction process. Because questions have been raised about the fidelity of the pore-pressure records, this paper reexamines pertinent aspects of the instruments and their placement and reviews the 1987 response. In addition, the authors evaluate and respond to criticisms by Hushmand et al. (1992a, 1992b) and examine analyses of other investigators that are essential to an evaluation of the fidelity of the piezometer records. The authors conclude that, in fact, the piezometers responded with a high degree of fidelity.


  • English

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: p. 975-995
  • Serial:

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Filing Info

  • Accession Number: 00663039
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 23 1994 12:00AM