CONSTRUCTIVE SOLUTIONS INFLUENCE STUDY OF THE METAL SILO PILE-SLAB FOUNDATION ON THE FOUNDATION SLAB DEFORMATION FEATURES

Abstract

walled metal silos. Their construction mostly is carried out in territories with unfavorable engineering and geological conditions. Types of foundations for metal silos of large volume are considered. Metal silos are important building structures. Accidents of metal silos and their causes are analyzed. It was established that a significant part of the complications and emergency situations during the operation of silos can be caused by uneven deformations of the soil, which are transmitted to the thin-walled shells of the silos, causing additional efforts not foreseen by the project. The study of the stress-strain state of the foundations for large metal silos was carried out using the finite element method. The study was conducted for a pile-slab foundation, taking into account the structural features of the underground conveyor gallery and the thickness of the foundation slab. It is shown that the slab thickness has almost no effect on the settlement of the pile-slab foundation. The stiffness characteristics of the underground gallery have a significant influence on the uneven settlement of the foundation slab: in the longitudinal direction, the gallery is a foundation of finite stiffness, and in the transverse direction (perpendicular to the gallery), its influence is insignificant. Coefficients of non-uniformity of settlement of the foundation slab were obtained during the joint operation of pile-slab foundation structures, taking into account the operation of gallery stiffness piles and changes in dimensions (thickness) of the slab. It has been demonstrated that the application of the finite element method allows for the assessment of foundation settlement and the unevenness of these settlement, which allows for the design of reliable foundations for metal silos.