In order to accurately investigate the actual behavior of tunnels under loads in various environmental conditions, we need to build real-scale samples. However, considering that building and applying forces on a large scale requires high costs, and on the other hand, in some situations, laboratory facilities are not available to prepare loading conditions on this scale, laboratory models are used for construction and loading to reduce costs and allow for various loadings. The construction of laboratory samples on a small scale should be such that they resemble real conditions to an acceptable extent. Usually, small test samples up to a scale of approximately 1.40 of the actual size are used to investigate the behavior of tunnels. In this study, laboratory-scale tunnels with a diameter of 15 cm were built and the samples were subjected to radial loading using a special set-up built at Sahand University of Technology. The tunnel sections tested were modeled in the Abaqus finite element software and the results of the experimental tunnel sections, including the radial strain generated against the applied load, were compared with numerical models such as. Analysis of the results shows that the radial strain generated in the tunnel sections increases with the increase in ductile elements. Creating small strains in the tunnel sections can greatly reduce the load and stresses applied to the sections, and on the other hand, by estimating the radial strain of the rock environment and the perimeter of the tunnels, it is possible to use the appropriate arrangement of concrete elements with high ductility.