TY JOUR TI A Comparative Analysis of the Elastic Modulus of the Ballast Prism When Using Volumetric Compaction Technologies and Traditional Methods of Track Straightening in Medium-Scale Railway Track Repair Conditions KW Modulus of elasticity KW crushed stone KW track renewal machines/trains KW ballast prism KW sleeper box JO Bulletin of scientific research results AU Somov, D.N. AU Petryaev, A.V. AU Parahnenko, I.L. AU Teniryadko, N.I. PY 2025 IS 2025 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"