Organizational and technological solutions for strengthening the earth roadbed in the permafrost zone

The transport facilities construction in the Arctic zone regions of the Russian Federation is a complex engineering task. This complexity is caused not only by a competent choice of structural and technological solutions for improving the foundation soils but also by rational organizational and technological solutions, which in turn affect the timing of the transport facility construction, its cost, and construction efficiency in the regions of the Far North of the Russian Federation. During construction in the permafrost zone, building materials often require delivery to the construction site using rail, road, and water transport. Construction in difficult climatic conditions implies the use of new work execution technologies using modern equipment to ensure the reliability and durability of structures under construction. Competent work organization and modern technologies minimize the construction time, but at the same time increase construction costs. To reduce the work time, the article presents the soil basement strengthening technology with the vertical shaft of gravel chippings. The authors present the work scope on the soil basement strengthening with vertical shafts of gravel chippings during the construction of the embankment according to the II design principle (with the allowance of thawing) and the technological sequence of its implementation. A work execution plan has been developed for the implementation of a double-beam organizational chart for strengthening the soil basement with vertical shafts of gravel chippings at the Obskaya-Salekhard section, picket 01+50-picket 06+50 of the new railway line «Northern latitudinal way». The needs for machines and mechanisms used in the implementation of the proposed technology are shown. Recommendations are given on the most favorable period for the work execution.