TY CONF TI IMPROVING THE RELIABILITY OF THE SLEEPER BASE KW railway track KW superstructure KW sleepers KW intermediate rail fastening KW heavy traffic JO INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "MANAGEMENT OF OPERATIONAL WORK IN TRANSPORT" (UERT-2022) AU Sokolovskiy, I.K. AU Hasenov, S.S. AU Poluhin, I.B. PY 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"