TY JOUR TI Engineering Survey and Calculations of the Sukharny Tunnel on Lozovo-Sevastopol Railway KW Mountain tunnels KW Crimea KW survey of underground structures KW engineering calculations KW seismic activity JO Proceedings of Petersburg Transport University AU Kavkazskiy, V.N. AU Solov'ev, D.A. AU Solov'ev, R.A. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"