Theoretical and Experimental Research Model of Junctioning Rigid and Non-Rigid Road Pavement

The junction of sections on rigid and non- rigid road pavement is a source of severe load. In course of time residual strain causes the formation of subsidence in road surface. This is not significant defect of road pavement but it has a negative impact on driving comfort. This effect reveals itself not only for road pavement damaged by overloading. The unavailability of verification and quality control during work is not considered to be a reason of the problem. It is based on the internal physical processes that occur in the junction of sections on rigid and non- rigid road pavement under wheel loading. The issue under discussion in this article is related to the problem of the formation of non-rigid road pavement subsidence in the junction of sections of rigid and non-rigid road pavement. Subsidence at the junction of the pavement most often occurs in the area of bridge approach. The subsidence of the non-rigid road pavement can later lead to the formation of pits on the road. The reason for the formation at non-rigid road pavement subsidence is irregularities in the procedure, suffusion. It is necessary to consider the degree of impact not only of the amount of load from the wheel, but also its direction.

The research subject is in the sphere of road construction and maintenance. The article analyzes the causes of the subsidence formation at approach section from non-rigid to hard road pavement. The reasons for the phenomenon of this drawdown have not been studied. There is no clear idea of the nature of appearance of mould and its structure at the boundary between the rigid and non-rigid pavement.

In the reviewed articles, a large amount of attention is paid to the comprehensive study of the transition from fracture to tension to fracture associated with soil stability problems [1,2], the creation of composite materials based on them [3,4]. When calculating pavement, the formation of subsidence is determined based on the application of loads on the surface of the coating [5,6]. The subjects of preventing the occurrence of subsidence are given a lot of attention when strengthening both base soils and coating materials so as to increase the bearing capacity [7]. Different types of impact on structures under the influence of external environmental factors, such as water-thermal [8], aggressive media [9] are also widely studied. The work of the material under various hydraulic regimes of free water in soils has been the subject of many articles [10-13], and the calculation is carried out using half-space methods [14,15,16], without taking into account the indispensable component as a load motion vector. The loads used in the calculations are static. The study of this issue is increasingly moving away from the consideration of the root causes of formation. It delves into the process of improving existing materials [17-20]. This circumstance prompted an in-depth study of the question on the causes of the appearance of mould at the pavement of rigid and non-rigid pavement.