To dimension the supporting structure, it is necessary to know the amounts of internal forces that occur inside the structure. In order to determine the internal forces, it is necessary to know the forces acting on the supporting structure, then to calculate the internal forces through them. These calculations for simple conditions can be performed manually, but if more complex conditions arise, the calculations often become too complicated to solve manually. Then it is the turn of software geotechnical programs such as GEO5 that easily calculate the required parameters. In this thesis, the emphasis is placed on examples of modeling of the rock in various soil models and groundwater conditions, and without it. The method of modeling a culvert using the two programs Designing a Collapse and Checking a Collapse is displayed. The programs allow calculations of the foundation depth of the supporting structure, bending moments, transverse forces and possible forces in the anchors, if defined. Also, the programs allow the dimensioning of the barrier rock. Reinforcements of reinforced concrete piles and diaphragms, or checking the bearing capacity of steel slats at the bending moment and transverse force.