Conference Proceedings Paper
COUPLED HYDRO-MECHANICAL BEHAVIOUR OF IN-SITU SHAFT SEALING COMPONENTS
37th Annual CNS Conference - 2017 June 04-07
C.S. Kim (Canadian Nuclear Laboratories)
M.C. Alfaro (University of Manitoba)
J.A. Blatz (University of Manitoba)
D.A. Dixon (Golder Associates Ltd.)
Decommissioning and closure of Canada’s Underground Research Laboratory (URL) involved the installation of a full-scale 5-m diameter by 12-m long shaft seal. This installation spans a major water-bearing fracture zone located at a depth of 275 m and is intended to isolate two hydrogechemcial regimes. Coupled hydro-mechanical (H-M) numerical modelling was conducted using the finite element method to examine the performance of this shaft seal and the numerical results were compared with the measured values. Overall predictions of changes in degree of saturation in the clay seal component show good agreements with the measured data. Both numerical results and measured data indicate gradual increase in the total pressure in the clay seal due to swelling of clay during hydration. Performance of coupled H-M analyses has provided a better understanding of various inter-related phenomena occurring during hydration of the shaft seal components.
Individual Conference-Paper Copies (Electronic Where Available):
- For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
- For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
- Contact the CNS office to order reprints.