Use of a precast segmented concrete lining for a tunnel in soft clay

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Pages587598; # of pages: 12
Subjecttunnelling; tunnel linings; clay soils; precast concrete; mining equipment
AbstractA tunnelling procedure using a full-face tunnel boring machine together with a precast segmented concrete tunnel lining has been developed in Canada and has been used successfully for a 2.16 m diameter tunnel in soft to firm clay at a depth of 10 to 12 m. The lining consists of rings composed of four trapezoidal sections of unreinforced concrete, 1 m in length and 11 cm thick. Each ring was assembled within the protection of the tailpiece of the tunnelling machine, to serve both as a primary support and the final tunnel lining. The annular space left between the segmental lining and the soil as the machine advances was pressure grouted during each advance. The tunnelling machine, lining segments and the procedure of erection and grouting of the lining is described, together with an indication of progress rates and performance.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number16360
NPARC number20373939
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Record identifierbfd3f6cd-f75d-4f9e-ad99-37bef5425d23
Record created2012-07-23
Record modified2016-05-09
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