The effects of boring a new tunnel under an existing masonry tunnel

Geotechnical Aspects of Underground Construction in Soft Ground 2026 Book chapter

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Authors: H Samuel, RJ Mair, YC Lu, Ilj Chudleigh, P Readings, T. I . Addenbrooke
DOI: 10.1201/9781003761952-45
Cited by: 2
References: 2

Abstract

A 3 metre diameter tunnel bored in London Clay passed under a cut and cover, brick arch tunnel constructed in 1863. The existing tunnel carries the Metropolitan Line railway under the heavily trafficked Euston Road and has an 8.7m span. The new tunnel was formed using a TBM, but some deformation of the surrounding soil was inevitable. Investigations and analysis showed that deformation would not prejudice the safety of the existing tunnel. Real-time instrumentation and surveys measured movements in close approximation to the predicted behaviour.

Fields of Study & Subjects

Geotechnical Engineering and Analysis Tunneling and Rock Mechanics Grouting Rheology and Soil Mechanics

Publication details

Journal / source
Geotechnical Aspects of Underground Construction in Soft Ground
Publisher
CRC Press
Pages
293–298
Publication date
24 February 2026
Language
EN
Document type
Book chapter