TY JOUR TI HOLLOW SCREW PILE KW screw pile KW foundations on piles KW enclosing structures KW fences JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Sahnov, A.V. AU Fomenko, Y.V. PY 2018 IS 3 PB Belgorod State Technological University named after V.G. Shukhov