%0 Journal Article %T Frost Heave and Its Influence on Spacer System of Enclosing Constructions of Deep Ditches %A Metelkin, S.V. %A Paramonov, V.N. %K frost heave, ditch fencing, spacer system, nature experiment, numerical modelling %J Proceedings of Petersburg Transport University %D 2022 %N 19 %P 9 %I FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"