Оценка анизотропии физико-механических характеристик грунта

Abstract

The paper raises the problem of soil sampling and determination of physical and mechanical characteristics during the performance of a screw reinforced concrete pile. Anisotropy of physical and mechanical characteristics has a significant effect on the performance of structures. This raises the question of the correct application of soil characteristics sampled by the standard method. The standard method of soil sampling using a cutting ring involves vertical cutting of the sample according to its natural occurrence. The subsequent physical and mechanical characteristics obtained do not reflect the anisotropy of the tested soil. At the same time, construction norms and regulations regulate to take into account the anisotropy of materials and soils when taking into account the nonlinearity of soil models, as well as the calculation of the "structure-foundation" system. For this purpose, a number of tests were carried out in which soil sampling differed from the classical method. Soil sampling was carried out using standard cutting rings at 90º and 45º angles from the vertical according to the natural soil occurrence. Physical and mechanical characteristics of the obtained samples were compared with control samples selected by the standard method. During the tests, the identified differences were subjected to analysis and determination of patterns for subsequent formation of conclusions and the ability of applications and extrapolation of physical and mechanical characteristics for future tests and calculations.