Improving the resistance of road pavements to rutting

Abstract

The aim of the article is to analyze the types of ruts formed on the surface of coatings, to study the causes of their appearance and develop construction of pavements with increased resistance to rutting. A technique is described for an experimental study of the distribution of tire passes over the width of a lane. During the experiment on existing roads, accounting points of the distribution of tire passes were organized. At each registration point, numbered strips are applied to the roadway, separating numbered sections 30 cm wide. Based on the results of an experimental study, empirical distributions of tire passes along the width of the roadway are established. The empirical data made it possible to establish discrete distributions of tire passes in width, with the help of which a correction factor was introduced into the calculation of the total number of repeated design loads. This coefficient allows calculating the number of passes in longitudinal sections located at different distances from you to the edge of the roadway or the axis of the road. As a result, central and edge parts that perceive the largest number of passages of the twin tires of the rear axles of the cars are highlighted on the tracks. To increase the resistance of pavements to rutting, constructions with unequal strength in width are proposed. The greatest strength and resistance to rutting belong to longitudinal sections on which the largest number of tires of the rear axles pass. In longitudinal sections between the ruts, the pavement is less strong. The increased strength of sections prone to rutting is achieved by creating hidden (secret) elements. Such elements are arranged in sump hole of either a subgrade or a base of granular material. Drawings of pavement construction are given.