Asphalt granulate coating for roadsides

Rustem Sakhapov,Regina Nikolaeva,Muhammat Gatiatullin,Marat Makhmutov,A Borodinecs,V Sergeev,N Vatin

doi:10.1051/matecconf/201824503014

Rustem Sakhapov, Regina Nikolaeva + Show 5 more

Open Access

https://doi.org/10.1051/matecconf/201824503014

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Abstract

The safety of road trains and other vehicles, the cost of maintenance and repair of roads largely depend on how well designed and calculated the design of the pavement. The research of many scientists and engineers is devoted to the design of pavement. Quantitative and qualitative changes in traffic flows cannot but affect the actual condition of road pavement and coatings, as well as the requirements for their operational condition. Road clothing is a structure that includes several layers of different materials, the base of which is the ground of the roadbed. The idea of deformability of the soil mass as a continuous homogeneous half-space has been developed for a long time and now continues to improve. Different technologies for the restoration of structural layers of the road surface were considered. On the basis of this work, it is possible to analyze the study of the state of roadsides and can be given suggestions for improving the calculation of the structures of their strengthening. As a result of the study, the reduction coefficients for the calculated vehicle were calculated with a different combination of longitudinal and transverse slopes of the roadway, a proportional increase in which will allow obtaining the reduction coefficients for all vehicles available in the flow, taking into account the slopes of the roadway.

Highlights

The method of calculating non-rigid elements of the road was firstly developed in 1870 by engineer E.S
Knowing the value of the pressure distribution angle, which is assumed an average of 45 ° for soils, it is possible to determine the area perceiving the load at any depth z, and with a known load p, set the specific pressure σz in any section of the road pavement σz = р/ωz
The method is based on the use of perennial spring observations of the open field soil moisture obtained at agrometeorological stations (AMS) of the region according to the standard methodology of the Hydrometeorological Service of the Russian Federation

Summary

Introduction

The method of calculating non-rigid elements of the road was firstly developed in 1870 by engineer E.S. The method of calculation he proposed was based on the assumption of an even distribution of pressure from the wheel of the vehicle into the clothing at an angle of the repose of the soil. Under this assumption, the area to which pressure is transmitted will increase as the pavement deepens into the thickness, which means that pressure distribution is a truncated cone, expanding deep into the road structure. The method is based on the use of perennial spring observations of the open field soil moisture obtained at agrometeorological stations (AMS) of the region according to the standard methodology of the Hydrometeorological Service of the Russian Federation. Based on the dependence of the soil moisture on the soil moisture of the open field, for the assumed reliability design moisture of the road pavement Wp is calculated

Methodology

Calculation results and discussion

Findings

Conclusions