A stress-strain state analysis of the road transport works foundations on seasonally freezing soils

Abstract

This article discusses the road transport works foundations when they are located in the seasonally freezing soils zone. Some culvert aqueduct utilized structures were considered and analyzed as an example, in the scope of most common structures on the road network and that also has an insignificant weight. Some constructive solutions disadvantages of these pipes were pointed out. It is noted that the operational characteristics of nonfrost-susceptible soil decrease in the watercourse filtering process and settling small particles and reported the dependence of the relative soil frost boil on the fine aggregate percentage. As an example of the frost boil forces influence, a typical culvert aqueduct design is considered. The calculation of axial and tangential heaving forces that affect the crown of tube is performed, assuming that the bedding soil is contaminated. Based on the calculation, rise calculated value dependence graphs of the unstressed base on the soil dampness and the heaving soil thickness, and the heaving pressure on the soil dampness are presented here. Due to the insufficient value of the forces holding back against lifting, possible negative consequences of the frost boil impact forces are presented, this affects not only the culvert aqueduct operational characteristics but also the roadbed smoothness and traffic safety. Thus, the need for additional measures to prevent soil swelling under the pipe head is justified. Recommended measures to prevent excessive deformations during frost boil, as well as modern aspects of the development of such technologies, are considered. Conclusions are made about their applicability and feasibility in relation to small artificial structures of transport infrastructure.