Slope Stability at a Hazardous Waste Site - Evaluation of the CPT Cone Factor Nk Using Dynamic Property Correlations

Matasovic, N., De, A., Dunn, J., and Kavazanjian, E. (2004), "Slope Stability at a Hazardous Waste Site - Evaluation of the CPT Cone Factor Nk Using Dynamic Property Correlations, " Proc. 11th International Conference on Soil Dynamics and Earthquake Engineering and 3rd International Conference on Earthquake Geotechnical Engineering, Berkeley, California, Vol. 1, pp. 478-484.

Abstract — In areas of high seismicity, slope stability often controls hazardous and solid waste landfill closure design. Undrained shear strength (Su ) of the waste mass is fundamental to seismic slope stability analyses. Su for hazardous waste landfills is often difficult to characterize. The physical and chemical natures of the waste fills typically preclude laboratory testing of the materials. In many cases, Cone Penetration Test (CPT) soundings can provide a viable technique for evaluation of Su provided that the cone shear strength factor Nk is known. However, if hazardous waste materials laboratory testing is not an option, Nk needs to be evaluated based upon results of non-intrusive in-situ testing. This paper presents a procedure developed by the authors for estimation of Nk from the results of non-intrusive SASW soundings and empirical correlations to shear strength of soils at one hazardous waste site. Generalization of the proposed methodology to other sites should be done with caution owing to variability between the parameters used in the analyses.

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