Investigation of the Influence of Dynamic Loads of Industrial Equipment on the Occurrence of Prolonged Yielding of their Foundation Soils

Abstract

The parameters of oscillations of the foundations and structures of the dynamic equipment of the new production workshop located in the Kharkiv region were experimentally investigated. For this purpose, appropriate measurements of the amplitude of oscillations in the vertical and orthogonal horizontal directions were performed. To compare the parameters of the amplitudes of forced oscillations and determine the damping properties of the applied rubber spacers placed between the frame and the slides, as well as the quenching effect of the foundation massif, several measurements of oscillation parameters were performed at the locations mentioned above. The amplitude of oscillations of the vertical component of the vibration load on different sides of the rubber dampers was reduced by 2-3 times, the horizontal component was completely attenuated. It was also established that there was no transmission of vibrations to the foundations of the production workshop. The safety of the measured parameters of oscillations from the point of view of long significant unstabilized subsidence of the foundations, both equipment and building, was determined. Recommendations for monitoring are given from the point of view of the possible deterioration of the properties of the used rubber dampers over time.

Investigation of the Behavior of Sand Under Repeated Dynamic Loads Using a Large-Scale Model of Soil Base

“…The research of the development of additional subsidence of the sandy base of the rigid stamp in time from the action of dynamic loads was carried out with the help of the software and hardware complex [15]. The soil under study is medium coarse sand, water-saturated, of density ρ=1,96t/m3; skeletal density ρ d =1,62 t/m3; humidity w=0,21; porosity coefficient e=0,64; internal friction angle φ=33°; specific adhesion с=3 kPa; deformation modulus Е=38 MPa (hereinafter referred to as Soil 1).…”