МЕТОДИКА ОПРЕДЕЛЕНИЯ МЕХАНИЧЕСКИХ ХАРАКТЕРИСТИК ВЯЗКОУПРУГИХ ГРУНТОВ

Abstract

Experimental studies of processes in soil foundations under load show that soils exhibit viscoelastic properties. The article presents the method for determining the mechanical characteristics of viscoelastic soil. One of the functions, for example, the soil creep function, is obtained from the experimental data of testing a sample for creep. Next, the soil relaxation function was determined using the numerical-analytical method of broken lines. The representation of the creep function in the form of a broken line made it possible to obtain the relaxation function (the inverse function to the creep function in Laplace - Carson images) as a solution of the viscoelasticity problem. Based on the known image of the desired original of the relaxation function in the form of a broken line, a transition from the image to the original was made using the broken line method, which is reduced to a system of linear algebraic equations regarding the desired parameters of the relaxation function. To determine the relaxation function using the proposed method, there is no need to experiment with a soil sample for relaxation. This saves on laboratory experiments. The proposed algorithm is of interest when designing construction projects on weak soil foundations, taking into account the viscoelastic properties of the soil.