Modeling the operation of road pavement during the thawing of soil in the subgrade of highways

Aleksandr Isakov,Denis Razuvaev,Michael Chakhlov,Irina Gudkova

doi:10.1051/matecconf/201823905008

Abstract

The solution for modeling the operation of road pavement during the thawing of soil in the subgrade of highways is proposed in this work. A model for layer-by-layer thawing of soil in the subgrade of highways was developed and illustrated, including the stage of modeling the change in the strength of the road structure during the thawing of soil, determining the dependence of the structural strength on the depth of soil thawing, thermophysical modeling of the process of freezing/thawing of soil in the subgrade using a software complex “Freeze-1” developed by the SSTU with determination of the dependence of the structural strength on time.

Highlights

Like any construction structure, is designed taking into account the worst combination of environmental factors and the impact of adverse natural and climatic conditions that must be taken into account when assessing the strength of road pavement
The most unfavorable period for the operation of the road pavement is the period of spring thawing and consolidation of soil
The proposed model is based on the consideration of the change in the strength of a road structure in the spring, which occurs due to changes in the physical and mechanical characteristics of the thawing soil

Summary

Introduction

Like any construction structure, is designed taking into account the worst combination of environmental factors and the impact of adverse natural and climatic conditions that must be taken into account when assessing the strength of road pavement. When designing the road pavement on clay soil in the cold regions, an analysis of the change in its strength, depending on the seasonal change in the characteristics of the soil base, is needed In such climatic conditions, the most unfavorable period for the operation of the road pavement is the period of spring thawing and consolidation of soil. The task of the designer is to predict the possible change in the strength and deformation characteristics of soil in the subgrade and to choose the design of road pavement that satisfies the worst conditions of soil To solve this problem, it is necessary to perform the modeling of operation of the road construction in the most unfavorable period of the year - during the thawing of soil in the subgrade of highways [1, 2]. - thermophysical modeling of the process of freezing/thawing of the subgrade with the help of the software complex “Freeze-1” [3, 4] developed at the Siberian State Transport University and approved on the basis of the range of the Siberian State Automobile and Highway University [5]

Model description

An example of using the model

Layer material

Conclusion