<p>During my internship at Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat, I was involved in a research project aimed at investigating the enhancement of lateral load capacity of piles in undrained cohesive soils through the use of external confinement using liners. My primary responsibilities revolved around the application of finite element modelling (FEM) techniques using PLAXIS 3D. My role and contributions in the project were as follows:</p><p>1)&nbsp;Developed and executed 3D finite element models in PLAXIS 3D to simulate the behavior of free-headed circular piles under lateral loading. This included modeling both unconfined and liner-confined piles of varying lengths (2.5 m, 5 m, 7.5 m, and 10 m) and applying different liner configurations (diameter: 1.5–3 m; length: 1–3 m). Pile behavior was analyzed under different undrained soil cohesion values (10–40 kPa).</p><p>2)&nbsp;Generated and analyzed load-displacement and load-cohesion response curves to study performance trends and soil-structure interaction characteristics.</p><p>3)&nbsp;Calculated the improvement factor (α), defined as the ratio of lateral load resistance in confined versus unconfined conditions, and studied its variation with soil strength and confinement dimensions.</p>