METHOD OF CONSTRUCTING A CURVE OF SOIL DEFORMATION Russian patent published in 2020 - IPC E02D1/02 

FIELD: construction.

SUBSTANCE: invention relates to construction and is intended for real-time construction of assumed soil deformation curve and evaluation of physical and mechanical characteristics of base soils, which provide methods of calculating bases, foundations and underground structures with initial information. Method of plotting the soil deformation curve includes soil tests, which are used to graphically plot the assumed soil deformation curve. Field tests of soil samples are carried out by the method of multichannel analysis of surface waves, according to the analysis results the profile of distribution of speeds of surface waves is built, according to the profile of distribution of speeds of surface waves the specific weight of soil layers is estimated γ, initial shear modulus G₀ at small deformations, correlation coefficient k between initial shear modulus and deformation module, deformation module E for die with area of 5000 cm², further define the ratio r of modulus E deformation stamp area of 5000 cm² to elastic deformation modulus E_el, corresponding to the maximum tangent modulus of deformation for a stamp in range 0.59–0.86 area of 5000 cm² and calculating elastic modulus of deformation E_el along primary branch of loading according to reduced relationship. Longitudinal wave velocity V_p is determined during field tests or according to the given relationship. Further, specific adhesion c and internal friction angle are evaluated ϕ soil by reduced relationship. Based on the results of tests by the method of multichannel analysis of surface waves, the domestic pressure σ_dom at the required depth according to the given relationship. Further, shape of assumed deformation curve is selected: hyperbolic or exponential, maximum deviator voltage is calculated σ_dev,max by the given relationship. Graphical construction of assumed deformation curve is performed by one of formulas – for hyperbolic or exponential curve of deformation.

EFFECT: technical result consists in provision of fast and cheap evaluation of physical and mechanical characteristics of each layer of soil, construct an assumed curve of soil deformation and perform preliminary assessment of geotechnical situation of site of new construction / reconstruction by nondestructive method.

1 cl, 2 dwg