TY JOUR TI Optimizing the sand cushion KW the solution to Boussinesq KW stress KW soil strata KW foundation KW metal pipe KW sand bags KW loads KW bending moment JO Construction and Architecture AU Glukhov, V.S. AU Hryanina, O.V. AU Glukhova, S.V. AU Pugina, A.P. PY 2019 IS 7 PB Publishing Center RIOR