Abstract
Apart from the assessment of stability, the determination of settlements at the surface is very important in tunnelling. However, in geotechnical engineering, deformations can be forecast with less accuracy than stability. This is mainly because the ground has a nonlinear stress-strain-relationship, so that one hardly knows the distribution of the stiffnesses. We consider here some rough estimations of the settlement of the ground surface due to the excavation of a tunnel. One should be aware of their limited accuracy.
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References
It also follows from more complicated computations for a linear-elastic material, see A. Verruijt and J.R. Booker: Surface settlements due to deformation of a tunnel in an elastic half space. Géotechnique 46, No. 4 (1996), 753–756
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This section is based mainly on the book “Building Response to Tunnelling. Case Studies from Construction of the Jubilee Line Extension, London”, Vol. 1, edited by J. B. Burland et al, Telford, London, 2001
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(2008). Settlement of the surface. In: Tunnelling and Tunnel Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-28500-8_19
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DOI: https://doi.org/10.1007/3-540-28500-8_19
Publisher Name: Springer, Berlin, Heidelberg
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