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Jones, Benoît; Thomas, A. H. (Alun H.); Hsu, Y. S. (Yu Sheng); Hilar, M. (2008)
Publisher: ICE Publishing Ltd.
Languages: English
Types: Article
Subjects: TA
The front-shunt tunnel was the first tunnel of the Terminal 5 project at Heathrow to be constructed, and was the first section of sprayed-concrete-lined (SCL) tunnel to be constructed using the method known as LaserShell. This innovation represented a significant deviation from the methods previously used in SCL construction. Therefore it was subjected to a careful examination before and during construction using sophisticated 3D numerical modelling and monitoring during construction. The paper presents typical results from surface settlement levelling, inclinometers and extensometers, pressure cells and tunnel lining displacement measurements, and comments on the performance of the methods and instruments used. The paper then presents the methodology and typical results of the numerical modelling, and shows that the predictions of displacements and stresses compared well with the field measurements. In terms of the control of ground deformations and structural safety the tunnel performed well.
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

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    • 2. HILAR M., THOMAS A. H. and FALKNER L. The latest innovation in sprayed concrete lining: the LaserShell method. Tunel (Magazine of the Czech Tunnelling Committee and the Slovak Tunnelling Committee ITA/ AITES), 2005, 4, 11-19.
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    • 13. HIGHT D. W., GASPARRE A., NISHIMURA S., MINH N. A., JARDINE R. J. and COOP M. R. Characteristics of the London Clay from the Terminal 5 site at Heathrow Airport. Ge´otechnique, 2007, 57, No. 1, 3-18.
    • 14. BRITISH STANDARDS INSTITUTION. Structural Use of Concrete. Code of Practice for Special Circumstances. BSI, London, 1985, BS 8110 Part 2.
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