Volume 32, N. 1

January-April 2009

Slope Failure Reanalysis of a Dilatant Dense Sand From CPTU and Laboratory Tests

Case Study

Volume 32, N. 1, January-April 2009 | PDF (3 downloads)

Abstract

Geotechnical properties of dense to very dense sands at Channel Island Harbor in Oxnard, California, are re-evaluated after slope failures to select appropriate strength parameters for remedial and extension works. The revetment is excavated at a slope of 2:1 (horizontal: vertical) in estuarine and dune sands and covered with a geotextile filter and armor rock. Reanalysis of the slope stability explores laboratory and in situ strength conditions of peak, constant volume and residual angles for the sands. A stress-dilatancy theory provides the framework used in re-characterization of the soil and observed slope failure mechanisms. Effective friction angles are recommended for further slope stability analysis at that location.

Keywords: slope stability, dense sand, site characterization, shear angle, dilatancy, case history.,


Submitted on January 01, 2009.
Final Acceptance on January 01, 2009.
Discussion open until January 01, 2009.
DOI: 10.28927/SR.321049