METHOD OF SOILS MECHANICAL PROPERTIES DETERMINING Russian patent published in 2016 - IPC G01N3/12 

FIELD: construction.

SUBSTANCE: invention relates to construction, soil mechanics, engineering geology, mining, in particular, to soils laboratory tests for determination of their physical and mechanical properties. Summary: soil sample preparation is performed, sample installation into instrument clip, creation of axial pressure on sample and measuring parameters characterizing soil sample condition. For determining of soil strength characteristics in process of axial active σ_1,i pressure growth side jet σ_3,i pressure is also measured during soil sample compression, for detection of axial pressure values exceeding structural strength, controlled change of m_i ratio increments between side Δσ_zi and axial Δσ_1i and with of axial pressure σ_1,i arbitrary value, when ratio of m_(i)-2= m_i-1= m_i= m = const, testing is stopped with determination of internal friction angle: soil structural strength: and adhesion: where σ_1,i, σ_{3, i} - current values of pressures, and σ_1,i>σ_str; m is soil lateral pressure factor; at limit state by Coulomb-Mohr with σ_1,i>σ_str.

EFFECT: technical result is possibility to considerably reduce laboratory tests production costs to determine mechanical properties of soils, reduce labor costs, as well as increase reliability of soil strength characteristics determining.

3 cl, 3 dwg