Оценка влияния точности определения прочностных свойств грунта на результаты проектных расчетов

To ensure the stability of buildings and structures during construction and throughout their service life, it is crucial to maintain the bearing capacity of the soil foundations. The calculation of soil resistance to loads is based on the indicators of adhesion and the angle of internal friction. These indicators, as per clause 5.3.9 of SP 22.13330.2016, should be determined according to GOST 12248-2020. The authors of this article have previously identified the shortcomings of soil strength testing methods according to GOST listed above. These shortcomings lead to significant errors in measuring of adhesion and the angle of internal friction. In this article, a quantitative assessment of the effect of the measurement error of specific adhesion by 1 kPa and the angle of internal friction by 1 degree on the calculation of the ground resistance of the base R, as well as on the calculation of the vertical component of the limiting resistance , is carried out. The calculation of the ground resistance of the base is determined by the method of calculating the bases for deformations. The calculation of the vertical component of the limiting resistance force is determined by the method of calculating the bearing capacity of the bases. The evaluation results showed the following. Errors in determining the specific adhesion by 1 kPa leads to deviations in soil resistance values of the bases up to 3 %. An error in measuring the angle of internal friction by 1 degree increases the error in calculating resistance to 10 %. Thus, an accurate assessment of the strength of the soil when determining the bearing capacity of the foundations of buildings and structures is critically important.