Design and Evaluation of a Subterranean Work Lining from Layers of Shotcrete and Steel Arch

Abstract:

A steel concrete lining is today the common ground massive retaining structure implemented shortly after the excavation of an opening. The constituent elements of the steel concrete lining are layers of shotcrete and steel arch frames. This simple structure has many unique features which set it apart from the conventional reinforced concrete constructions. Without simplification these features doesn’t allow to carry out design and evaluation of steel concrete lining by relevant design and evaluation methods convenient to the conventional reinforced concrete constructions. The main differences are construction process, yielding curve of structure and determination of external load. In the case of a steel concrete lining its external load is product of mutual work of both the ground massive and the lining. The value of load depends on the yielding curves of the lining and the ground massive. The yielding curve of a ground massive is objective and conditioned on strength strain properties of ground massive and primary stress state. The yielding curve of a steel concrete lining relates lining design specification. The process of construction affects the value of load too. The article analyzes the steel concrete lining focusing the influence of lining design parameters on its yielding curve. It looks for a way to control the ground massive behavior and as well as to engage it more in an effort with lining to stabilize subterranean work. The themes of the analysis are: static and deformation parameters of the cross-section of the steel concrete lining with regard to the construction stage and dependency of hardening shotcrete; interaction between of steel concrete lining and ground massive based on yielding curves; assessment of a stress state across the steel concrete lining section in the steel concrete lining constituent elements. The analysis is carried out on mathematical models that combine analytical and numerical methods.

• Periodical: Advanced Materials Research (Volume 1020)
• Pages: 347-350
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1020.347
• Online since: October 2014
• Authors: Karel Vojtasik*, Eva Hrubesova, Marek Mohyla, Lukáš Duris
• Keywords: Cross-Section, Lining, Shotcrete, Steel, Tunnel

References

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DOI: 10.2478/v10160-010-0006-3

[3] K. Vojtasík, E. Hrubešová, M. Mohyla, J. Staňková, Dependency of Elastic Modulus and Stress Redistribution Coefficients on a Layout of Steel Reinforcement in Steel-Concrete Cross Section, Transactions of the VŠB – Technical University of Ostrava Civil Engineering Series, Vol. XI, Issue 1, 109–115 (2011).

DOI: 10.2478/v10160-011-0015-x