Site liquefaction and remediation

ABSTRACT

Two free-field downhole array seismic are now available to document the underlying siteliquefaction response mechanisms. records of acceleration and pore pressure at the Wildlife Refuge (Imperial County, CA, USA) reflected liquefaction during the 1987 Superstition Hills earthquake. In 1995, liquefaction at Port Island (Kobe, Japan) was documented by a four accelerometer down-hole array during the Hyogoken-Nambu earthquake. Using these record, the associated shear stress-strain response is identified and employed as a guideline for development of liquefaction cournter-measure techniques. A number of these tecniques are discussed in view of the identified response mechanisms. (AU)