David Y. Reduction efforts in underwater pipelines of large diameters in the construction of the deep issues.

The object of research: underwater pipelines of large diameter swivel inserts and to determine their stress-strain state of immersion; Research goal: the goal of the thesis is theoretical and experimental study of the proposed engineering solutions to ensure feasibility of laying the deep issues of sewage into the sea from the large-diameter steel pipe for environmentally sound depth; methods - theoretical, based on the hypothesis of rigid filaments as a design model and the experimental conditions in the laboratory simulation with fixing the stresses and strains in the cross sections calculated by immersing the passage; Results: theoretically substantiated and developed a method for calculating the stress-strain state of large-diameter pipelines srsharnirnimi inserts in their immersion in bolshietglubiny within the calculated spans.The areas of rational application of the proposed engineering solutions for the design and construction of deepwater sewage releases by numerical calculations on a computer on a specially prepared program; novelty: the first theoretical and experimental analysis of the work has undergone a deep release of large diameter hinge insertions in the dive to great depths;found a significant effect of introducing hinge inserts to reduce the internal forces in large-diameter pipes at their dive to great depths;experimentally substantiated the correctness of the basic assumptions made in developing the method of calculation by comparing the experimental and calculated values of the parameters characterizing the stress-strain state of the submerged pipe with swivel inserts; the introduction: in the learning process, the data transferred to the thesis of SE PI "Odessakomunproekt" for the introduction of offshore releases of treated wastewater treatment plant "Severnaya" in Odessa.