Application of shotcrete constitutive model to the time dependent behavior of TBM tunnel lining

 
 
 
  • Abstract
  • Keywords
  • References
  • PDF
  • Abstract


    Shotcrete is ordinary concrete applied to the surface under high pressure. It demonstrates a highly time-dependent behaviour after few hours of application. Traditional approaches assume a simple linear elastic behaviour using a hypothetical young modulus to investigate the time-dependency and creep effects. In this paper, a new constitutive model of shotcrete is applied to evaluate the time-dependent behaviour of a TBM tunnel lining and investigate the parameters that can influence this behaviour. The Shotcrete model is based on the framework of Elasto-plasticity and designed to model shotcrete linings more realistically. The basic data of Pahang-Selangor Raw Water Transfer Project is used for the analysis study. An attempt is made to investigate the influence of some input parameters of the shotcrete model on the time-dependent behaviour of the shotcrete lining. These parameters include the time-dependent stiffness/strength parameters, creep and shrinkage parameters and steel fibre parameters. The variation in shotcrete strength classes causes a noticeable influence on the development of shotcrete compressive strength with time, particularly during the first days of application. The creep and shrinkage strain cause a considerable reduction in the development of the shotcrete stress with time. The impact of steel fibre content is determined, and the result indicated that the development of plain shotcrete stresses with time is lower than that of the reinforced shotcrete. In addition, a comparison study is performed to analyse the tunnel lining behaviour using both shotcrete model and an elastic analysis. Significant differences in shotcrete lining stresses are achieved when using the elastic analysis while the shotcrete model results in a reasonable result that can be used for the design requirements.

     


  • Keywords


    Creep and Shrinkage; Shotcrete Model; Shotcrete Stress; Steel Fiber; Time-Dependent Behavior.

  • References


      [1] M. Vandewalle, The use of steel fiber reinforced shotcrete for the support of mine Openings, South African Institute of Mining and Metallurgy, 98, 3 (1998) 113-120.

      [2] R. Zollo, Fiber-reinforced concrete: An overview after 30 years of development, Cement and Concrete Composites 19, 2 (1997)107-122.

      [3] J. Sustersic, A. Zajc, R. Ercegovič, V. Jovicić, Early age behaviour of Fibre Reinforced Shotcrete, Proceeding of International Conference on Sustainable construction materials and technologies, Coventry, UK, 2007.

      [4] E. Saurer, T. Marcher, B. Schaedlich, and H. Schweiger, Validation of a novel constitutive model for shotcrete using data from an executed tunnel, Geomechanics and Tunnelling, 7 (2014) 353–361. https://doi.org/10.1002/geot.201400023.

      [5] R. Schütz, D. Potts, and L. Zdravkovic, Advanced Constitutive Modelling of Shotcrete: Model Formulation and Calibration, Computers and Geotechnics, 38 (2011) 834–845. https://doi.org/10.1016/j.compgeo.2011.05.006.

      [6] R. Schütz, Numerical Modelling of Shotcrete for Tunnelling. PHD thesis, Imperial College London, London, (2010)

      [7] A. Thomas, Sprayed concrete lined tunnels. CRC Press, UK. 2009

      [8] R. Brinkgreve, E. Engin E, and W. Swolfs, Finite element code for soil and rock analyses, Plaxis 2D Manual, http://www.academia.edu/8233451/PLAXIS_-Finite_Element_Code_for_Soil_and_Rock_Analyses. 2012.

      [9] H. Schweiger, T. Marcher, and B. Schädlich, Application of a new shotcrete constitutive model to numerical analysis of tunnel excavation, Proceedings of the Geo-Shanghai 2014 International Conference, China, 2014. https://doi.org/10.1061/9780784413449.088.

      [10] B. Schaedlich, and H. Schweiger, A new constitutive model for shotcrete, proceeding of the eighth European conference on Numerical Method in Geotechnical Engineering, Netherlands, 2014. https://doi.org/10.1201/b17017-20.

      [11] B. Schaedlich, H. Schweiger, T. Marcher, and E. Saurer, (2014) Application of a novel constitutive shotcrete model to tunnelling. Rock Engineering and Rock Mechanics: Structures in and on Rock Masses, (2014) 799-804.

      [12] CEB-FIP model code 1990. Design code – comite Euro-international du Beton. London. Thomas Telford. https://www.icevirtuallibrary.com/isbn/9780727739445.

      [13] EN 14487 2006. Sprayed concrete. European Committee for Standardization. http://www.phd.eng.br/wp-content/uploads/2015/12/en.1992.1.1.2004.pdf.

      [14] F. Oluokun, E. Burdette, and J. Deatherage, Splitting tensile strength and compressive strength relationship at early ages. Materials Journal.88 (1991)115-121.

      [15] EN 1992-1-1. Eurocode 2: Design of concrete structures. European Committee for Standardization, 2004.

      [16] ACI 209R-92. Prediction of creep, shrinkage and temperature effects in concrete structures. American Concrete Institute, Committee 209, 1992

      [17] B. Schädlich, and H. Schweiger, Internal report shotcrete model: Implementation validation and application of the shotcrete model. Delft: Plaxis, 2014.

      [18] T. Kawata, Y. Nakano, T. Matsumoto, A. Mito, F. Pittard, and A. Azman, The Relationship between TBM Data and Rockburst in Long-Distance Tunnel, Pahang-Selangor Raw Water Transfer Tunnel, Malaysia, 8th Asian Rock Mechanics Symposium, Sapporo, Japan, 2014.

      [19] R. Azit, and M. Ismail, Modeling Stress-Induced Failure for Deep Tunnel Excavation of Pahang-Selangor Raw Water Transfer Project, 9thAsian Rock Mechanics Symposium, Bali, Indonesia, 2016.

      [20] S. Lee, M. Ismail, and M. Ng, The Evaluation of Tunnel Behaviours under High Rock Stress Using Numerical Analysis Method. Electronic Journal of Geotechnical Engineering, 17 (2012) 3605-3626.

      [21] J. Barros, and J. Figueiras, Flexural behaviour of SFRC: testing and modelling. Journal of Materials in Civil Engineering, 11(1999) 331-339. https://doi.org/10.1061/(ASCE)0899-1561(1999)11:4(331).

      [22] A. Al-Ameeri, The effect of steel fiber on some mechanical properties of self-compacting concrete, American Journal of Civil Engineering 1 (2013) 102-110. https://doi.org/10.11648/j.ajce.20130103.14.


 

View

Download

Article ID: 11293
 
DOI: 10.14419/ijet.v7i3.11293




Copyright © 2012-2015 Science Publishing Corporation Inc. All rights reserved.