Method of Calculating the Limiting Depth of Ruts on the Pavement of Automobile Roads

Abstract

Proposed the criterion for design pavement, limiting the rut depth RD by limiting value RD lim, which depends on the required values of transport and exploitation characteristics. The solution to the problem is based on the classical dependence of the dynamic coefficient on speed at the point of impact of bodies. In this fundamental dependence, the collision speed of the tire with coated is determined by the speed of the wheel and the depth of the irregularities. From this fundamental formula, the functional dependence of the irregularities depth on the speed of movement, the deformation characteristics of the pavement, the power parameters of the moving load (dynamic coefficient), the distance of entry and exit of the wheel from the rut when overtaking another car is obtained. The analysis of the work of specialists of the road industry, which allowed to establish the limit values of all the factors under consideration for coatings, the state of which is characterized by different assessments (excellent, good and satisfactory). For different conditions of coverage, the limiting values of the rut depth RD lim are given.