Volume 21, Issue 3 (September 1998)
Commentary on Marchetti Flat Dilatometer Correlations in Soils
Since its inception in 1975, the flat dilatometer has served as a simple and expedient indexing tool for site stratification and evaluation of soil properties, primarily in North America, Europe, and Southeast Asia. Although the original empirical correlations have proved useful in obtaining approximate parameters for geotechnical analysis and design, the initial statistical trends were based on data from only eleven natural soils, primarily in Italy. A number of comparative studies, modified relationships, and new correlations have since become available in foreign soils, and several of these are reviewed herein. The possibility of adopting generalized expressions for data reduction and the interpretation of soil properties is explored, particularly for evaluating the lateral stress coefficient (K0) in clays from the dilatometer index (KD).