Application of a new shotcrete constitutive model to the numerical analysis of a tunnel excavation

H. F. Schweiger, T. Marcher, B. Schädlich

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Numerical analyses are performed on a routine basis in practical geotechnical engineering to assess the deformation behaviour of tunnels - in particular, for near-surface tunnels - in soils where the influence on existing infrastructure (such as buildings, deep foundations and adjacent tunnels) has to be evaluated. In addition, it becomes increasingly common to use results from numerical analysis as basis for designing the support measures for the tunnel. When doing so, the strongly nonlinear material behaviour of shotcrete - namely, the increase of stiffness and strength with time - should be taken into account, in particular when the excavated cross-section is subdivided into several construction stages involving temporary shotcrete structures with high stress concentrations near corners. In this paper, a new constitutive model for shotcrete is applied in the numerical analysis of a complex underground railway station. It could be shown that significant differences in lining stresses are obtained when employing the newly developed constitutive model for shotcrete. However, the overall deformation behaviour is not significantly influenced by the shotcrete model.

Original languageEnglish
Title of host publicationTunneling and Underground Construction - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress
PublisherAmerican Society of Civil Engineers (ASCE)
Pages890-899
Number of pages10
Edition242 GSP
ISBN (Print)9780784413449
DOIs
Publication statusPublished - 1 Jan 2014
Event2014 GeoShanghai International Congress: Tunneling and Underground Construction - Shanghai, China
Duration: 26 May 201428 May 2014

Conference

Conference2014 GeoShanghai International Congress: Tunneling and Underground Construction
CountryChina
CityShanghai
Period26/05/1428/05/14

ASJC Scopus subject areas

  • Architecture
  • Civil and Structural Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Schweiger, H. F., Marcher, T., & Schädlich, B. (2014). Application of a new shotcrete constitutive model to the numerical analysis of a tunnel excavation. In Tunneling and Underground Construction - Selected Papers from the Proceedings of the 2014 GeoShanghai International Congress (242 GSP ed., pp. 890-899). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784413449.088