الفهرس 
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Abstract
During the Earthquake of October 12, 1992, in Dahshour, near
Cairo, Egypt, extensive damage to engineering structures occured as a
results of liquefaction and densification of the sandy soil on which
they were supported. At El-Aiiat and the surrounding villages,
liquefaction had taken place in a form of ”sand fountains” and
excessive settlement in a major highway.
In this search, laboratory test programme was prepared to perform
the laboratory tests and the exprimental studies concerning the
behavior of sand under seismic effect (cyclic loading effect). a simple
shear device and a shaking table were locally fabricated and used for
this experimental study. Different parameters, such as relative density,
base acceleration, frequency, percentage of fine, and shear strain
amplitude, were changed to study its effect on both liquefaction and
densification of three different soil samples. Conclusions and
recommendations were listed at the end of this search.