METHOD OF DETERMINATION OF SOIL MECHANICAL PERFORMANCES, PEAT AND FROZEN BEDDINGS Russian patent published in 2009 - IPC G01N33/24 

FIELD: physics, measuring.

SUBSTANCE: invention concerns building, namely to determination of mechanical performances of the soil, peat and frozen beddings at designing of the bases and embankments of constructions. Method of determination of mechanical performances of the soil, peat and frozen beddings includes their loading effort P of the rigid sphere in diameter D with gauging flowing precipitates S_t till the moment of its stabilisation in time t, and also includes sphere relief, its definition contact precipitates S₀ and by results of trials: the long-term coupling C_long of supposed limiting pressure on the frozen warrant [R] and the module of blanket strain E₀ of the bedding. The sphere is coated with easily erased material, for example, a soot before the next trial of the bedding. Effort to sphere at bedding trial transmit through a dynamometer elastic device with the constant performance of rigidity k=const its drawing of squeezing - of a tension l=kP. Sphere in a ground or warrant peat immerse forcedly not less than three times on the given depths S_t1 <S_t2 <S_tk which quantity support a stationary value till time moment t stabilisations of corresponding efforts P_1, P₂, P_k. Then yield relief of sphere with gauging of circles of the coat which have remained on sphere in diameter d_K, count the contact precipitates of sphere corresponding to medial contact pressures and build the diagramme of dependence S = (S_t-S₀) =f (p_av) and the tangential straight lines to the points of the diagramme corresponding to efforts P₁, P₂, P_k before cross with an abscissa axis, radiuses p, equal to an odds of values p_cp and intersection points of tangents corresponding to them with an abscissa axis. Build circles of voltages Mopa of peakly limiting state of the warrant at a tension and draw to their a blanket tangential straight line before cross with abscissa axes and ordinates, from the diagramme remove a critical angle θ° of internal friction of ground and measure the instantaneous coupling c_e. Count an angle of interior friction and specific coupling. In radius R from the beginning of co-ordinates of the diagramme spend a semicircle adjoining to it and cutting on an abscissa axis a point, corresponding to the limiting voltage on tension to which value under a drawing there corresponds the long-term coupling. Count the module of blanket strain of the warrant and further through sphere to the warrant put constantly increasing effort P_c> P_k till the moment of stabilisation of its limiting quantity P_c=const at recording corresponding to it blanket precipitates S_c of the warrant.

EFFECT: increase of accuracy of determination of mechanical performances of soil bedding.

4 dwg, 2 ex