Developing New Relationship between Standard Penetration, Cone Penetration Test and Sleeve Friction in Various Soil Type

Abstract

The Standard Penetration Test (NSPT) and Cone Penetration Test (CPT) is the most implemented standard procedures in the in-situ site investigations to characterize geotechnical foundation designs and determine soil properties. The purpose of this analysis is to review some of the correlations between existing CPT and NSPT and propose new associations based on eight types of soil, namely silty sand, sand, gravelly sand, clay, sandy silt, silt, clayey sand, and sandy clay by considering suitability geotechnical design and its potential against soil liquefaction by using a phased statistical approach. The statistical analysis called a statistical gradation approach is applied using Linear Regression to produce new equations between NSPT and CPT and Power Regression for further comparisons between NSPT and sleeve friction (fs). The purpose of this paper is to develop a robust correlation between NSPT with Qc and fs for five soil types, namely Gravelly Sand, Sand, Sandy Silt, Silty Sand, Clay-based on SPT data, CPT, and sieve test. The correlation between NSPT to Qc and fs shows that the RMSE value is lower than the value referenced from the literature.

Keywords: Standard Penetration Test, Cone Penetration Test, sleeve friction, gradation approach, RMSE.