The method of soil improvement with lime or cement column or pozzolan technique is one of the techniques that can be used to reduce the influence of pressure development on expansive soil. The column technique can also serve as a pavement foundation. This paper presents the results of numerical modeling with finite element method (FEM) of the SiCC column model used as a rigid pavement path foundation system with plate system. The column technique used in this study is a plain or O-Shape form. The main purpose of this study was to search soil material parameter value that will be used in modeling and examine the effect of column length on pressure and deformation of rigid pavement road foundation system with plate system. The model of columns supporting a rigid pavement with a plate system modeled as a plane strain in ABAQUS ver. 6.11-2. The diameter of the column (Dc) used is 5,08 cm with a length of 50 cm and 70 cm. The modeled section of the road body is 1 x 1 m2 in size and depth of 1,2 m with 30 cm thickness and 70 cm of expansive clay layer above the sand layer as thick as 20 cm. The modeled section is the result of plate deflection observation due to pressure done in laboratory. Soil material and pavement layers are modeled as Drucker Prager models. The results of the analysis showed that the vertical deformation of the soil due to pressure decreases with increasing column length.. Thus, the larger the length of the column tends to produce lesser deformation.