TY CONF TI ENSURING THE STRENGTH OF COHESIVE CLAY SOILS RAILWAY EMBANKMENT KW railway embankment KW clay soils KW strength KW shear characteristics JO INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "MANAGEMENT OF OPERATIONAL WORK IN TRANSPORT" (UERT-2022) AU Bondar', I.S. AU Kvashnin, M.Y. AU Kosenko, S.A. AU Akimov, S.S. PY 2022 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"