METHOD FOR CONDUCTING ENGINEERING-GEOLOGICAL AND GEOTECHNICAL SURVEYS Russian patent published in 2021 - IPC E02D1/00 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction and is intended for engineering-geological and geotechnical studies carried out during the design of the foundations of capital construction objects. A method for conducting engineering-geological and geotechnical studies using a measuring and computing complex containing a drilling machine, a computer, a force stress mechanism, devices for field testing of soils, software for processing measurement data and controlling the force stress mechanism, correlation dependencies between test parameters and soil characteristics is provided. A number of initial parameters for the calculation are entered into the program of the measuring and computational complex, such as the geometric dimensions of the studied soil mass with the foundation plan, the sites of reference digging, the foundation depth and the foundation loading. The drilling machine is installed at the site of the first working, the power mechanism of the drilling machine is started at the command of the computer and the sounding device is immersed in the ground on the reference digging, the sounding parameters are measured and the characteristics of the soils are determined using the corresponding correlation equations. The works are repeated at other reference digging sites. An engineering-geological model is formed in the form of a three-dimensional soil body with geometric dimensions and a set of characteristics for various soil models according to the defining equations, using the program, a three-dimensional soil body is divided into finite elements with the coordinates of their centers X, Y, Z, using interpolation functions and characteristic values of soils in reference digging sites, the characteristics of soils are found for each center of the finite element. A soil model and a corresponding set of characteristics are selected and local stiffness matrices are formed, a global stiffness matrix, an external load vector are formed, a system of differential equations is solved, and displacements, deformations, and stresses are found.

EFFECT: invention is aimed at ensuring a reduction in the design time for capital construction objects by calculating the stress-strain state of foundations in the process of geotechnical and geotechnical studies, increasing the accuracy of studies of soil properties and calculating the stress-strain state of the foundations of buildings and structures.

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