Liquefaction in embankment foundation soils

Deformation mechanisms of a dense sand embankment supported on a liquefiable loose sand foundation are investigated in a dynamic centrifuge model test. This pilot test is conducted within a framework of experimental and numerical studies toward the development of rational liquefaction countermeasure procedure for highway embankments. Deformations within the embankment and foundation are monitored by placement of soft spaghetti rods located throughout the model, along with LVDTs along the ground surface.(AU)

Engineering aspects of the October 12, 1992 Egyptian earthquake

On october 12, 1992 a moderate earthquake Mb = 5.9 (Ms = 5.2) occurred about 18 km southwest of the center of Cairo and resulted in significant damage to numerous old and/or poorly constructued structures. Soil liquefaction associated with the occurrence of large sand-boils was observed close to the epicenter. In this study, the earthquake characteristics, along with typical examples of induced damage, are discussed. The observed liquefaction mechanisms provide valuable information on the seismic response of Nile deposited alluvial soils. Such soils constitute much of the inhabited area of Egypt.(AU)