Pile foundations are a crucial part of civil engineering projects, requiring structural support for various types of structures ranging from buildings to bridges. This technical paper explores the design principles, initial pile load test (vertical compression load test), finite element analysis, and interpretation of nature of pile and soil interaction. It covers the design methodology adopted for pile in sand and clay. This study provides a comprehensive understanding of constitutive modelling used for simulating the pile load test and interpretation of load-settlement curves. The long piles in soft soil condition often subjected to many risks out them, reduction in shaft resistance, collapsing of borehole, soft sediments accumulation at bottom of bored hole technically known as soft toe are very critical. These can be addressed by providing suitable supporting fluid. PLAXIS 3D was employed to evaluate the settlement behaviour of piles with bentonite and polymer stabilizing fluids. It was observed that piles with polymer stabilizing fluid showed superior performance with higher mobilized skin friction.