The paper presents three methods of the numerical modelling of a 60 m long integral bridge structure resting on elastic soil. The presented bridge structure is made of cast in situ reinforced concrete of strength class C50/60. The bridge models were built using Abaqus FEA software. Models A and C represent complex three-dimensional numerical models consisting of the bridge structure and the soil layer beneath it. The soil layer on which these bridge structures are resting was modelled as a homogeneous, isotropic, continuous and elastic semi-infinite body-elastic half-space. Additional third model B represents a simple three-dimensional numerical model consisting of just the bridge structure. The stiffness of the soil layer under this bridge was replaced by the rocking, vertical and horizontal springs applied to the bottom surface of the bridge footing foundations. The formulas to calculate the spring stiffness were derived by Barkan and Posadov-Gorbunov based on the theory for an elastic half-space. Model B represents an engineering approach to the design of an integral bridge structure. The paper is focused on the methods of modelling an integral bridge structure resting on elastic soil.