Cemented silt is a unique material which the parameters are not fully understood. This paper presents a numerical study using the finite element method, to estimate some empirical equations (i.e. soil shear strength and soil stiffness parameters) for Jakarta soil, specifically, the cemented silt. The investigation is based on a well-documented pile load test case study. To verify these parameters, a comparison is made through the measured load-settlement curves for a case study involving an 1800 mm diameter drilled shaft foundation in an LRT project, predominantly situated in cemented silt soil. Furthermore, the influence of loading sequence is studied by comparing the load-settlement curves for Procedure B and Procedure G according to ASTM D 1143/D 1143M-07. Additionally, the effect on soil shear strength and soil stiffness in the Hardening Soil model is examined by comparing the back analysis method with some published equation between shear wave velocity (vs) and NSPT. The results indicate that different loading patterns, intervals for load increment and decrement, as well as the shear strength and soil stiffness parameters influence the resulting load-settlement curve. Moreover, the stiffness value significantly affects the load-settlement curve, lower stiffness values correspond to larger deformations, and vice versa.