Aleksandrovych V. Vibrostability of sand soil bases of machines with dynamic loads, subjected to the harmonic law

The subject is a phenomenon of the vibrocreep bases, composed of fine and medium water-saturated sand, caused by harmonic dynamic loads on foundations; the aim is to improve the method of determining the vibrocreep settlement of the bases, composed of fine and medium water-saturated sand, machine foundations with harmonic dynamic loads, with the frequency of forced vibrations less than 50 Hz; methods - the proven methods of the theory of multifactor experiment planning; standard laboratory and field methods of determining the phisico-mechanical and dynamic characteristics of the soil; methods of soil mechanics, soil hereditary creep theory and mathematical statistics; novelty - new experimental combinations depending on the influence of the static pressure under vibrostamp were installed, the amplitude and frequency of its harmonic vibrations on the emergence and development vibrocreep settlement of bases, composed of fine and medium water-saturated sands; the application the hereditary creep theory of Boltzmann kernel to describe the process of vibrocreep saturated sandy foundation bases of machines with rotating parts was grounded for the first time; the method of calculating the residue of water-saturated sand of foundations under dynamic loads machines subjected to the harmonic law was improved, with forced vibration frequency of 50 Hz; results - the condition of foundation machines mechanism with specified harmonic loads at a frequency of forced vibrations up to 50 Hz was defined, which compliance eliminates the possibility of uneven settlements of bases while operating the machines; the engineering approach to predict the conduct of water-saturated sand deposits of foundations machines with rotating parts for the required time period was developed; the software-hardware system to study the conduct of soils under dynamic loads subjected to the harmonic laws was created; the brunch - construction