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Tunnelling close beneath an existing tunnel in clay – perpendicular undercrossing

Author(s): ORCID





Medium: journal article
Language(s): English
Published in: Géotechnique, , n. 9, v. 67
Page(s): 795-807
DOI: 10.1680/jgeot.sip17.p.117
Abstract:

A series of centrifuge model tests in clay was carried out to investigate the response of an existing tunnel at different clear distances to new tunnelling. A three-dimensional (3D) staged tunnelling model was adopted to simulate a wide range of tail void volume losses for the new tunnel construction while monitoring detailed 3D soil surface settlements and tunnelling-induced strains in the existing tunnel lining. This paper also presents a detailed case study of a similar scenario in the London Underground redevelopment of Bond Street station; various state-of-the-art instrumentation methods, including fibre optic Brillouin optical time domain reflectometry, instrumented tunnel bolts and photogrammetry, were deployed to monitor the response of the existing Royal Mail tunnel due to the new tunnelling works close beneath. The combination of field and centrifuge modelling data provides important new insights into the deformation mechanisms encountered in such complex tunnelling scenarios.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1680/jgeot.sip17.p.117.
  • About this
    data sheet
  • Reference-ID
    10674074
  • Published on:
    12/06/2022
  • Last updated on:
    12/06/2022
 
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