Proje lojistiği alanında faaliyet gösteren aşırı yüklü/aşırı büyük araçların karayolu üstyapısına etkisi ve kendinden tahrikli modüler taşıyıcı (SPMT) örneği

Highway flexible pavement design; is based on the determination of the thickness of the layers according to characteristics of material to be used in the current traffic loads and environmental conditions in a way to resist the stresses that will occur during the design life. In recent years, increasing the importance of Special Project Transport, which is one of the special tools used in this sector SPMT (Self-Propelled Modular Transporter) is given information about. These vehicles, which are used to carry loads above the usual loads of size and weight, have been increasing in recent years. These vehicles can be combined in different ways to carry loads of any size and weight. For example, a port crane, a gigantic ship or plane, or even a building with tons of weight can be transported from one point to another on the highway. In order to avoid damage to the highway superstructure during transportation, the design of the highway superstructure should be designed to withstand the stresses that may occur. An exemplary study on the transfer of an important building from one point to another is carried out, then the weight per axle of SMPT which is capable of carrying the size and weight of the important building is calculated. Then the SPMT's Equivalent Axle Load Factor (EALF); It has been calculated by using the damage formulas of AASHTO 1993 design method which is still the most widely used pavement design method in our country and in the world. Since the Mechanistic-Empirical Design Method has become an increasingly powerful method in pavement design compared to the empirical methods in recent years, on the road where SPMT passes, changes in factors related to the vehicle such as the axle load, wheel distance and tire pressure of the vehicle; changes in factors related to the road such as layer thickness, elastic modulus and poisson ratio of hot asphalt layer, granular base layer thickness and the modulus of elasticity of the subgrade impact on the fatigue damage, rutting and permanent deformation was made by comparing the mechanistic analysis. In case of all other conditions were kept constant; changing of axle load, wheel spacing, tire pressure, hot asphalt layer properties, granular base layer thickness and the modulus of elasticity of the subgrade is investigated for how impact of pavement damage.