TY JOUR TI The Application of Mathematical Modelling in the Survey of an Existing Excavation Pit KW Piles KW reconstruction KW sheet piling KW excavation retaining wall KW mathematical modelling KW excavation survey JO Proceedings of Petersburg Transport University AU Kravchenko, P.A. AU Podunin, V.M. AU Makarov, A.N. PY 2025 IS 22 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"