Displacements ahead of an advancing NATM tunnel in the London clay
Displacements ahead of an advancing NATM tunnel in the London clay
This paper reports the results of monitoring carried out to study the patterns of ground displacement that develop ahead of an advancing sprayed concrete lined tunnel in soft ground. Extensive instrumentation was installed and monitored during the construction of the Heathrow Express platform tunnels forming part of the underground station at London Heathrow's Terminal 4. The construction of the concourse tunnel, built between the two completed platform tunnels, provided the opportunity to install additional instrumentation ahead of the tunnel drive, and to measure ground movements as the tunnel approached the instrumented sections. The paper describes the ground conditions at Heathrow, and the method of construction used for the concourse tunnel. The performance of the instrumentation and the pattern of ground displacements measured are reported. Finally, a synthesis of ground displacements measured is given, and the results are compared with the volume loss recorded during the concourse tunnel construction.
tunnels, monitoring, field instrumentation, ground movements, case history
767-784
van der Berg, J.P.
40051846-d050-4a78-a348-9a093ae93720
Clayton, C.R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
Powell, D.B.
78ad1aa4-32e5-4f0f-b3e4-06b6fd319be7
November 2003
van der Berg, J.P.
40051846-d050-4a78-a348-9a093ae93720
Clayton, C.R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
Powell, D.B.
78ad1aa4-32e5-4f0f-b3e4-06b6fd319be7
van der Berg, J.P., Clayton, C.R.I. and Powell, D.B.
(2003)
Displacements ahead of an advancing NATM tunnel in the London clay.
Géotechnique, 53 (9), .
(doi:10.1680/geot.53.9.767.37422).
Abstract
This paper reports the results of monitoring carried out to study the patterns of ground displacement that develop ahead of an advancing sprayed concrete lined tunnel in soft ground. Extensive instrumentation was installed and monitored during the construction of the Heathrow Express platform tunnels forming part of the underground station at London Heathrow's Terminal 4. The construction of the concourse tunnel, built between the two completed platform tunnels, provided the opportunity to install additional instrumentation ahead of the tunnel drive, and to measure ground movements as the tunnel approached the instrumented sections. The paper describes the ground conditions at Heathrow, and the method of construction used for the concourse tunnel. The performance of the instrumentation and the pattern of ground displacements measured are reported. Finally, a synthesis of ground displacements measured is given, and the results are compared with the volume loss recorded during the concourse tunnel construction.
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Published date: November 2003
Keywords:
tunnels, monitoring, field instrumentation, ground movements, case history
Organisations:
Civil Engineering & the Environment
Identifiers
Local EPrints ID: 39407
URI: http://eprints.soton.ac.uk/id/eprint/39407
ISSN: 0016-8505
PURE UUID: 439fe383-d387-4fe0-bed4-13ab003bafa4
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Date deposited: 28 Jun 2006
Last modified: 16 Mar 2024 03:12
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Author:
J.P. van der Berg
Author:
D.B. Powell
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