Aniskin A. Lateral pressure of granular anisotropic medium on closely spaced walls considering technological factors

The Object of Research - homogeneous and anisotropic by shear strength granular medium; Goal - the development of experimental and theoretical methods of lateral pressure exerted by granular anisotropic by shear strength medium, taking into account technological factors in closely spaced parallel retaining walls; Methods - Laboratory methods for determination of the physical properties and strength properties of soil shear strength in accordance with the British BS 1377 standard: 1990 Clause 4, methods of lateral pressure measurements using the single point load cells, methods of mathematical statistics for processing the results of experiments, numerical and analytical methods for theoretical modeling; Results - experimental data on the anisotropy of the shear strength properties of filling depending on orientation of the particles was obtained, allowing qualitatively assess the properties of soils with different preferred orientation of the particles contained; Experimental data on the effect of the percentage of the flat particles in the filling on the anisotropy of its shear strength properties was obtained, that allow to assess the percentage of flat particles, in which case the properties of granular material shear strength should be equal to the flat particles properties; the model construction with closely spaced walls and the lateral pressure measurement method with different orientation of the particles in the filling was developed; experimental data on the effect of the composition and condition of the backfill in the closely spaced vertical rigid wall was obtained; the influence of the filling shear strength anisotropy on the pressure transmitted to the closely spaced walls was justified experimentally; calculation method of filling lateral pressure taking in account the anisotropic shear strength characteristics that depend on the method of packing was developed; Implemented - in the educational process during the lectures and practical classes in the Croatian University North in Varazdin, on the Faculty of Civil Engineering for students of II. and III. year in courses of "Strength of Materials", "Applied Geomechanics" and "Earthquake Engineering".