Abstract
To date sea, river and railroad terminals with metallic vertical cylindrical silos as technological equipment are used to transfer cereal and oil crops. Designs of reinforced concrete buried foundations with underground galleries and foundations with overground under-silo storey that are arranged for cylindrical metallic silos of high capacity have been investigated. The main criterion that requires strict observance is not to exceed the allowable value of settlement of metallic silos. Also, because the construction of silo is sensitive to nonuniformity of deformations, the criterion of uniformity of settlements within the boundaries of foundation shall be observed. Analysis of factors of silo accidents has shown that their considerable number occur as the result of destruction of metallic construction of silos by nonuniform operational loads caused by asymmetric actions during emptying silo. Nonuniform above-the-norm deformations of foundations also quite frequently cause silo accidents. Foundations of metallic silos of transfer terminals cause considerable loads on the base. Natural soil base is not always capable of taking stress under the foot of foundation. This is being solved by strengthening foundation bases: by making soil cushion, reinforcing the base with the more strong and rigid elements, injecting mineral or polymeric binders. Pile foundations are quite common during building silos. But their use is not always economically reasonable and justified in particular geological conditions of the building site. Rigidity parameters of the base essentially influence stressed-deformed state of foundations of metallic silos of increased diameters and distribution of contact stresses under the foot of foundations. Deformation parameters of the base and the construction of foundation create the possibility to regulate settlements and deflections of foundation. This makes it possible to control distribution of contact stresses. The value and character of settlement of round slab foundation of silo depend on the values of operating loads, dimensions and depth of foundation laying, distributional properties of its design, geological conditions of the base, influence of loads from the neighboring structures. Application of numerical methods of simulation of combined operation of base-foundation-structure to assess stressed-deformed state of silo foundations proves that prospective trend of improvement of design solutions of silo foundations is application of their prestressing. This causes increase in foundation rigidity and positively influences its stressed-deformed state.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Collected scientific works of Ukrainian State University of Railway Transport
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
