Liquefaction Testing of Stratified Silty Sands
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 126, Issue 3
Abstract
The cyclic behavior of stratified silty sandy soils is at present poorly understood, yet these materials are commonly found in alluvial deposits and hydraulic fill, which have a history of liquefaction during earthquakes. The main objective of this research project was to compare the behavior of stratified and homogeneous silty sands during seismic liquefaction conditions for various silt contents and confining pressures. A comprehensive experimental program was undertaken in which a total of 150 stress-controlled undrained cyclic triaxial tests were performed. Two methods of sample preparation were used for each soil type. These methods included moist tamping (representing uniform soil conditions) and sedimentation (representing layered soil conditions). The silt contents ranged from 10 to 50%, and confining pressures in the range of 50 to 250 KPa were considered. The results indicated that the liquefaction resistances of layered and uniform soils are not significantly different, despite the fact that the soil fabric produced by the two methods of sample preparation is totally different. The findings of this study justify applying the laboratory test results to the field conditions for the range of variables studied.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 126 • Issue 3 • March 2000
Pages: 208 - 217
History
Received: Apr 30, 1998
Published online: Mar 1, 2000
Published in print: Mar 2000
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