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Deformations and pore pressures in the vicinity of a precast, segmented, concrete-lined tunnel in clay

From National Research Council Canada

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  1. National Research Council of Canada
FormatText, Article
Subjecttunnels; strain; soil tests; clay soils
Abstract
During construction of a 2.16 m diameter tunnel in a soft to firm clay deposit in Thunder Bay, Ontario, an initial array of instrumentation to provide data indicating overall performance and a second array to provide detailed spatial deformation and pore-water pressure distribution were installed. The tunnel lining consisted of unbolted rings composed of four trapezoidal, unreinforced concrete sections assembled within the tailpiece of the tunnel boring machine. This paper presents and discusses detailed observations of soil deformation, pore-water pressure changes, and total pressure on the lining obtained from the second array of instrumentation. The soil stratigraphy was similar to that at the first array and the data obtained are compared with the earlier data. Monitoring of the instruments is continuing and data from the first year of observations are presented.
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  • Canadian Geotechnical Journal 17, no. 2 (May 1980): 174–184.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-895
NRC numberNRCC 18088
NRC-IRC-2294
NPARC number20375009
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Record identifier23ebccde-7d27-4527-816c-47dc2d948a3c
Record created2012-07-23
Record modified2024-03-19
Date modified: