This article explores the system of helical piles and its behavior in compression. Three calculation methods have been examined: Latvian building code LBN 214-03 “Geotechnics. Pile foundations and footings” (СНиП 2.02-03-85), the calculation method proposed by the company “A.B.CHANCE”, and the large load-bearing capacity screw piles calculation methods developed by Canadian building engineers, which are used for the determination of helical pile load-bearing capacity. The construction methods of screw pile foundations have been compared and the advantages and disadvantages have been described. The article analyzes helical screw piles in compression with a different number of capacitive plates in four different soils – fine sand, floating loam, sandy loam and hard loam. The capacity of screw pile was obtained using the method developed by the American company “A.B.CHANCE”. Factors causing incapability have been determined. As none of the methods mentioned above describes the deformation of screw piles and does not provide any calculation or evaluation principles, the finite element calculation model by computer soft-ware “Lira 9.2” was used for the simulation. The deformation of a screw pile with one or two capacitive plates was examined in four different soils. The model also showed the interaction between the screw pile and the soils. The stresses in the soil massif have been calculated. Further research should be directed towards the development of the calculation method for deformation, as well as towards the verification of the calculation model of finite elements, and the modification to take into account the soils plasticity.