METHOD TO DETERMINE GRAVITY PRESSURE OF MATERIAL MEDIUM IN MASSIF AND ITS NATURAL DENSITY Russian patent published in 2015 - IPC E02D1/02 

FIELD: measurement equipment.

SUBSTANCE: invention relates to the field of "Physics of material contact interaction" and serves to determine gravity (compression) pressure in a massif of material medium of certain density. The method to determine gravity pressure of material medium in a massif and its natural density consists in the fact that at the specified depth h (cm) of the material medium massif using field methods of engineering survey, they determine the angle φ_srt of the inner friction and specific adhesion c_srt of the medium of integral structure under conditions of gravity (compression) pressure p_c. At the same time the value of gravity pressure in the massif of elastic cohesive plastic soil medium is determined according to dependence $$p_{cG}=c_G^{str}\cos {\phi }_G^{str}(1-\sin {\phi }_G^{str})/(1+{\sin }^2{\phi }_G^{str}),$$ and density of soil medium is calculated as $${\rho }_G^{str}=\frac{c_G^{str}\sin {\phi }_G^{str}}{gh}\left(\frac{1-\sin {\phi }_G^{str}}{1+{\sin }^2{\phi }_G^{str}}\right)$$ at specific weight $${\gamma }_G^{str}=\frac{c_G^{str}\sin {\phi }_G^{str}}{h}\left(\frac{1-\sin {\phi }_G^{str}}{1+{\sin }^2{\phi }_G^{str}}\right),$$ where g - acceleration of free fall of a body under gravity conditions (cm/s). Then the value of gravity pressure in the massif of elastic resilient anisotropic peat medium is determined using dependence $$p_{cP}=\frac{c_P^{str}}{1-tg{\phi }_P^{str}},$$ and density of peat medium is calculated as $${\rho }_P^{str}=\frac{c_P^{str}}{gh(1-tg{\phi }_P^{str})}$$ at specific weight $${\gamma }_P^{str}=\frac{c_P^{str}}{h(1-tg{\phi }_P^{str})}=p_{cP}/h.$$

EFFECT: possibility to determine the value of gravity (compression) pressure in a massif of material medium by data of its strength parameters φ_str and c_str in integral condition, and also value of specific weight γ_str and density ρ_str of medium under conditions of gravity of Earth surface.

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