Jones, Benoît. (2011) Underpassing of Angel Underground by London ring main extension tunnel. International Journal of Geoengineering Case Histories, Vol.2 (No.2). pp. 105-126. ISSN 1790-2045

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Abstract

This paper presents the predictions of movements, monitoring methods and measured movements of the Angel Station Upper Escalator and the Northern Line London Underground tunnels during tunnelling for the Thames Water Ring Main Extension Stoke Newington to New River Head (TWRM) tunnel. The earth pressure balance tunnel boring machine was driven from a launch shaft in Stoke Newington in an approximately southerly direction to a reception shaft in Islington, at depths of between 40 and 60 m. Along its route, the TWRM passed near to the Upper Escalator of Angel London Underground station, the longest escalator in western Europe, and soon after passed underneath two operational and one disused Northern Line tunnels. No discernible tunnel-induced movements of the escalator were observed. The measured movements of the tunnels were within the conservative expected value predictions of volume loss, but the trough widths were consistently narrower than expected.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Water-supply engineering -- England -- London, Tunneling -- England -- London, Surveying -- England -- London
Journal or Publication Title:	International Journal of Geoengineering Case Histories
Publisher:	Elxis sa
ISSN:	1790-2045
Date:	24 March 2011
Volume:	Vol.2
Number:	No.2
Number of Pages:	22
Page Range:	pp. 105-126
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access
References:	Jones, B.D. (2010). “Low volume loss tunnelling for the Thames Water Ring Main Extension”. Proc. Instn. Civ. Engrs Geotechnical Engrg 163(GE3), 167-185. Mair, R.J., Taylor, R.N., and Bracegirdle, A. (1993). “Subsurface settlement profiles above tunnels in clay”. Géotechnique 43(2), 315-320. Moss, N.A., and Bowers, K.H. (2006). “The effect of new tunnel construction under existing metro tunnels”. Proc. Geotechnical Aspects of Underground Construction in Soft Ground, 151-157. London: Taylor & Francis Group. Newman, T.G., Yuan, L.F.V., and O’Keeffe, L.C. (2010). “Using tunnel boring data to augment the geological model”. Proc. Instn. Civ. Engrs Geotechnical Engrg 163(GE3), 157-166. O’Reilly, M.P., and New, B.M. (1982). “Settlements above tunnels in the United Kingdom – their magnitude and prediction”. Proc. Tunnelling ’82, IMM, London, 173-181. London: IMM. Peck, R.B. (1969). “Deep excavations and tunnelling in soft ground”. Proc. 7th ICSMFE, Mexico, 1969, State of the art volume, pp.225-290. Mexico: Sociedad Mexicana de Mecánica de Suelos.
URI:	http://wrap.warwick.ac.uk/id/eprint/40529

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