Many in situ and laboratory tests are being performed to determine the engineering properties of soils. Several relationships
can be established between in situ tests and laboratory tests to ensure that both achieve similar results. In this study, in situ
standard penetration test and Menard pressuremeter tests were performed on the clayey samples that are in high and low
plasticity soil class taken from 6 boreholes reaching to the hanging walls and footwalls of the thrust fault. Disturbed and
undisturbed samples were collected in the field, and their physical and mechanical properties were determined in the laboratory.
Corrected SPT (SPT-N60), Menard deformation modulus (EM), and net limit pressure (PL) values were obtained as part
of in situ tests performed. These values were then compared with physical properties like the liquid limit, plasticity index,
natural moisture content (w), and mechanical properties like the pre-consolidation pressure (σpc) and cohesion (c) that were
determined through laboratory tests, and linear and non-linear multiple regression analyses were performed on them. The
analyses revealed multiple regression equations between dependent variable EM and independent variables SPT-N60, w, c,
and σpc were obtained with a high degree of determination coefficient. The results also indicate that these multiple regression
equations obtained thusly so provided more accurate results compared to simple regression correlations.