№2(10) 2018

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https://eir.nuos.edu.ua/handle/123456789/3326

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Перегляд №2(10) 2018 за Ключові слова "composite floating dock"

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  • Ескіз
    Документ
    Methods of improvement of the design and construction technology of composite docks
    (2018) Kyrychenko, K. V.; Yahlytskyi, Yu. K.; Shchedrolosiev, O. V.; Кириченко, К. В.; Яглицкий, Ю. К.; Щедролосев, А. В.
    The article renders the research based on the use of criteria for choosing the optimal design of a composite floating dock taking into account current standard requirements, which enable developing recommendations for the design and construction technology of the dock. There is substantiated the choice of the main parameters that make it possible to draw a generalized criterion for choosing the optimal designs of floating composite docks with account for the best practices of their construction and operation, as well as the results of experiments in the most difficult docking conditions. The system of criteria is used for controlling the mass and strength of dock structures, a set of technical and economic issues, reliability and ease of operation. A design of a composite floating dock with a reduced number of pontoon frames is proposed. There, the reinforcement aiding local strength is installed on the outside in the direction of the smallest span, and the reinforcement aiding general strength is installed inside the element. Special features of installing the frames in the top deck of the dock are described, and their absence in the concrete towers of the ribs of floor plates and beams is substantiated. The structural and technological diagrams of the constructive midship frame of a floating dock and the slipway for dock construction are presented. Their application allows reducing the material capacity and labour intensity of dock construction. The technological recommendations for reinforcement of bottom plates of the pontoon of a composite floating dock are rendered. The diagram of reinforcement of pontoon bottom plates in the area of maximum hydrostatic pressure is presented. It is shown that a protective layer of concrete on the working reinforcement provides for the joint operation of reinforcement with concrete at all stages of operation of the facility, as well as protection against aggressive external effects. Special features of the selection of a shipbuilding concrete targeted at the extreme conditions of operation of marine reinforced concrete facilities are listed. The influence of air-entraining and plasticizing agents in the concrete mixture is considered. They are used for the improvement of strength, impermeability, frost and corrosion resistance of concrete, reduction of water consumption, enhancement of workability and reduction of consumption of cement.