This paper provides some recent updates on the interpretation of some key geotechnical parameters in an effort to develop a more unified approach. Extensive use is made of the normalized soil behaviour type SBTn chart based on normalized cone resistance Q t and normalized friction ratio F r. Updates are provided regarding the normalization process and its application to the identification of soil type. New correlations are presented in the form of contours of key parameters on the SBTn chart.
The cone penetration or cone penetrometer test CPT is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy. It was initially developed in the s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft soils. Based on this history it has also been called the "Dutch cone test". Today, the CPT is one of the most used and accepted soil methods for soil investigation worldwide.
Scientific Research An Academic Publisher. Lunne, T. Diverse researchers intended to identify the soils in function of results of CPT by means of the use of classification graphics based on empiric correlations. Also, they stand out the necessity to continue getting into these studies and they emphasize that local experiences could differ from the studies carried out.