Development of numerical Software for Sheet Pile Wall This report presents the methodology and validation of the software program developed to analyze the sheet pile walls using the Soil Structure Interaction method. The report presents the general theory behind the SSI method, and how it can be used to analyze the behavior of sheet pile walls and the anchors. The software is based on some assumptions that it can only consider a single layer of soil with constant section throughout its depth. MATLAB coding was used to develop a program that solves multiple equations developed from SSI method to generate the moment, shear, deflection, and slope diagrams for the sheet pile walls.