%0 Journal Article %T Prospective Technologies for Strengthening the Main Trackbed with a Sub-Ballast Protective Layer Using High-Performance Complexes of Russian Production %A Akulinin, S.V. %A Vorob'ev, V.B. %A Ul'yanov, V.A. %K Railway track, sub-ballast protective layer, technological process, track repair, multifunctional track machinery %J Bulletin of scientific research results %D 2023 %N 2023 %P 9 %I FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"