Method for calculating the limit rut depth for safe traffic
https://doi.org/10.52170/1815-9265_2022_60_104
Abstract
Rutting of flexible road pavements including the improved asphalt-concrete ones is a problem that is being solved all over the world. For this purpose, research is being carried out in the direction of developing materials and technologies that make it possible to build layers of pavement that are resistant to shear and plastic deformation. They create calculation methods that allow predicting the increase in the rut depth during the operation of the road. Experimental and theoretical studies are carried out to determine the maximum rut depth, based on the conditions for maintaining the transport and operational indicators of the road at an acceptable level. The combination of such studies allows to calculate the required thickness of the pavement from the condition of limiting the depth of the rut by a limit value. In these calculations, the rut depth resulting from pavement wear and residual deformations of the structural layers is compared with a limit value. Limit values are assigned in accordance with the requirements of norms and standards. Analysis of the limit values of the rut depth recommended by different authors and used in the practice of various road agencies showed that these values differ by a factor of 1,5–2,5.
The article presents a method for calculating the limiting depth of a rut, which makes it possible to limit its values depending on the required values of the coefficient of adhesion of the tire to the surface, the speed of movement along the road section, the depth of the water layer in the rut and the parameters of the roughness of the surface. The basis for calculating the limit rut depth is the criterion according to which the actual value of the coefficient of adhesion of the tire to the surface cannot exceed the limit value. The formulas for calculating the limit rut depth and the calculation results for various conditions of the pavement are given.
About the Authors
A. S. Aleksandrov
Siberian State Automobile and Highway University
Russian Federation
Russian Federation
Anatoly S. Aleksandrov – Candidate of Engineering, Associate Professor of the Construction and Operation of Roads Department
Omsk
T. V. Semenova
Siberian State Automobile and Highway University
Russian Federation
Russian Federation
Tatyana V. Semenova – Candidate of Engineering, Associate Professor of the Construction and Operation of Roads Department
Omsk
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Review
For citations:
Aleksandrov A.S., Semenova T.V. Method for calculating the limit rut depth for safe traffic. Bulletin of Siberian State University of Transport. 2022;(1):104-116. (In Russ.) https://doi.org/10.52170/1815-9265_2022_60_104
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