TY JOUR TI Mathematical Modelling of the “Water — Ground Mass — Immersed Section” System KW Underwater tunnel KW immersed sections KW mathematical modelling KW finite element method (FEM) KW Metrogiprotrans method KW HRM JO Proceedings of Petersburg Transport University AU Sokornov, A.A. AU Mel'nik, Y.V. AU Ledyaev, A.P. AU Pinchuk, A.V. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"