The study of sandy soils density in the subgrade of road embankment when compacted by explosions of elongated charges

Objective: To create a solid subgrade for highways and railways fulfillment. Methods: Drilling and blasting technology with vertical sand drains formation and explosion energy use was applied. The method in question assumes acceleration of weak organic soils consolidation and loose sands ompaction in the subgrade of the road embankment. Results: Research work was carried out to reduce deformations in the road embankment during the high-speed road construction. Based on the research data, the porosity coefficient and the density index of the sand layer, being the subgrade of the road embankment, were obtained. The article presents a comparison between the results calculated before and after the work. Practical importance: When comparing the results of cone penetration test in soil, obtained at different stages of work, the conclusion was made that the sands in the subgrade of the road embankment were compacted. This fact implies that the application of drilling and blasting technology at sand drains formation results both in weak soils stabilization and also in loose sands compaction. The range of conducted works provides durability and stability in the subgrade of the road embankment.