A review of shear strength analysis methods for ground bases reinforced with geosynthetics is given in the article. An angle of stress dispersion has been found to be the parameter of soils and discrete materials which were calculated according to the experimental data. The analysis of mathematical models that connect the angle of stress dispersion with other soil parameters which are ascertained in the laboratory was performed. This analysis shows the absence of direct experimental methods for investigation of distribution capacity. For this reason indirect measurements are used to calculate the angle of stress dispersion. The direct method for measuring distribution capacity has been developed on the basis of a colour strip analysis. There are two variants. The first way deals with photo interpretation, the second one uses full-scale models for direct measurements. Statistical analysis shows that reinforcement of ground bases increases distribution capacity of the soil under the geosynthetics.