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Information × Registration Number 0221U103334, 0119U001140 , R & D reports Title Mathematical modeling of the temporary fastening and the surrounding massif interaction during the construction of railway tunnels popup.stage_title Head Tyutkin Oleksij L., Доктор технічних наук Registration Date 18-02-2021 Organization Dnipro National University of Railway Transport named after Academician V. Lazaryan popup.description2  The analysis of methods of temporary fastening of tunnel workings at construction of tunnels in the NATM, in particular arched fastening, anchor and shotconcrete is carried out. Analytical calculations of the specified types of temporary fastening of the railway tunnel and temporary combined fastening by the Metrogiprotrans method are carried out. It is established that the strength conditions for each of the fasteners are met, the thickness of the shotconcrete temporary fastening for a particular case can be taken from 5 cm, and the margin of safety of the combined fastening is 1.92 times. The basics of modeling the temporary fastening of the railway tunnel are specified, for which the basics of sampling for finite elements of flat deformation of soils are given and the algorithm for creating a finite element model of the railway tunnel based on LIRA and SCAD is reproduced in detail. Mathematical modeling of the temporary fastening during the construction of the tunnel by the NATM was performed, it was found that the normal forces decrease from the heel to the lock by 2.35 ... 5.35 times, depending on the construction stage. Product Description popup.authors Bielikova Sofiia I Bondarenko Nataliia K Dubinchyk Olha I Kuprii Volodymyr P Petrenko Volodymyr D popup.nrat_date 2021-02-18 Close