Обґрунтування конструкції станції метрополітену пілонного типу в скельних породах при варіюванні ширини пілонної частини

K. Ye. Fedorov

doi:10.15802/stp2026/351391

Authors

K. Ye. Fedorov Ukrainian State University of Science and Technologies, SEI DIIT, Ukraine https://orcid.org/0000-0002-3010-0489

DOI:

https://doi.org/10.15802/stp2026/351391

Keywords:

metro, pylon-type station, rock formations, stress-strain state, finite element method, New Austrian tunneling method

Abstract

Purpose. The author aims to conduct a numerical analysis using the finite element method of the structure of a pylon-type station, which is being built in rock formations using the New Austrian tunneling method (NATM), and to conduct its substantiation when varying the width of the pylon part, determining the dependences of the components of the stress-strain state. Methodology. It was determined that the pylon-type metro station under study is a structure that has obvious structural heterogeneity. A detailed analysis of the structural solution of the «pylon – passage» system of a pylon-type metro station constructed by NATM was conducted. It was substantiated that the reflection of the heterogeneous structure of a pylon-type metro station with the reproduction of the «pylon – passage» system is a task of mathematical modeling based on the finite element method. Using the professional calculation complex Structure CAD, finite element models of a pylon-type station with varying the width of the pylon part were developed. Findings. The results of the stress-strain state of the combined lining of a pylon-type metro station were obtained using finite element models with varying the pylon width. It is proven that for a pylon-type metro station with varying the pylon width b_pyl, the deformed state remains homogeneous. Qualitative analysis of the six components of the stress-strain state with variation in the pylon width proves that the effect of the pylon width is local and decays in the vicinity of 1.0 … 1.2 m. The analyzed dependencies are linear or polynomial, respectively, for different components of the stress and strain state and allow us to justify the width of the pylon, which ensures the strength of the station structure. Originality is characterized by the first-ever obtained dependences of the stress-strain state of the combined lining of the pylon-type metro station with variations in the width b_pyl. Practical value lies in carrying out a series of calculations during mathematical modeling by the finite element method with the analysis of the strength of the station structure and the provision of recommendations for the selection of its dimensions.

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