Open AccessStress-strain state of expansive soils when soaking from above
Author(s) -
Viktor Yarkin,
Nataliia Lobacheva
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/869/5/052052
Subject(s) - expansive clay , expansive , finite element method , geotechnical engineering , stress (linguistics) , soil water , geology , swelling , stress–strain curve , base (topology) , strain (injury) , soil science , structural engineering , materials science , mathematics , engineering , composite material , mathematical analysis , medicine , linguistics , philosophy , compressive strength
The article proposes a method for determining additional vertical stresses at any point in the massive of expansive soil, which arise from the weight of unmoistened soil outside the soaking area. A comparison of the results of research stress-strain state of expansive soils when soaking from above, obtained by the proposed method, the finite element method and in accordance with current regulatory documents. The proposed regularity of the distribution of additional stresses from the weight of unmoistened soil outside the soaking area in horizontal sections of the flooded zone is confirmed by the results of numerical studies by the finite element method. For a vertical line passing through the center of the flooded zone, the proposed method gives results that are almost identical to the current regulatory documents. The application of this method allows more accurate determination of the swelling surface, taking into account the unevenness of the geological structure, the shape of the flooded zone and stress fields, and determining the forced displacements of the base or equivalent loads when calculating structures interacting with expansive soil. The conditions are determined under which it is advisable to simulate the impact on the building from the side of swelling soil by equivalent loads acting from the base.