Subgrade Strengthening on the Sections for Cars Interchanging with Axle Load of 25 T and More

The article deals with the problem of strengthening of the subgrade located on the sections that have the interchange of cars with the axle load of 25 tons and more. The issues of the subgrade behaviour were studied on the example of the Eastern test site with regard to geotechnical and permafrost conditions for the construction and maintenance of subgrade. The main directions to the subgrade strengthening are referred to the following: 1) Strengthening of the top of subgrade; 2) Providing the stability of the sloping parts of subgrade; 3) Providing the carrying capacity of the weak, including thawing, roadbeds.