An overview of long-term HM measurements around HADES URF

Wim Bastiaens; Frédéric Bernier; Xiang Ling Li; Jan Verstricht

An overview of long-term HM measurements around HADES URF

Wim Bastiaens, Frédéric Bernier, Xiang Ling Li, Jan Verstricht

Research output › peer-review

Abstract

The underground research facility HADES was constructed to study the feasibility of HLW disposal. Since its operational start 25 years ago numerous instruments were placed in the lining and the surrounding host rock. Some set-ups are operational for over 20 years measuring pore pressure, total pressure or displacements. Displacement measurements enable to assess the displacement during and after excavation works; construction and lining techniques have an influence on the amount of displacement. The short-term response of the host rock put into evidence a strong HM coupling. An anisotropic response and evolution of pore water pressure was observed; this phenomenon was attributed to anisotropy of stress and hydraulic conductivity. The ground pressure on the gallery lining was recorded during several years; it increases fast during the first months after construction and a more gradual increase occurs afterwards. Hydraulic conductivity (k) was measured using several methods at different locations, times and scales. The results of in-situ and laboratory tests are consistent; k is of the order of 10-12 m/s. A hydraulic conductivity increase is observed up to some 6m into the host rock and is attributed to lower effective stress-levels experienced in this zone due to stress-redistribution following the excavation.

Original language	English
Title of host publication	Proceedings of The Internation Symposium of the International Society for rock Mechanics on Multiphysics Coupling and long Term Behaviour in Rock Mechanics
Place of Publication	London, United Kingdom
Pages	15-26
Volume	1
State	Published - 9 May 2006
Event	EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics - Belgian Rock Mechanics Society, Liège Duration: 9 May 2006 → 12 May 2006

Publication series

Name	Proceedings and Monographs in Engineering, Water and Earthe Sciences

Conference

Conference	EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics
Country/Territory	Belgium
City	Liège
Period	2006-05-09 → 2006-05-12

Cite this

Bastiaens, W., Bernier, F., Li, X. L., & Verstricht, J. (2006). An overview of long-term HM measurements around HADES URF. In Proceedings of The Internation Symposium of the International Society for rock Mechanics on Multiphysics Coupling and long Term Behaviour in Rock Mechanics (Vol. 1, pp. 15-26). (Proceedings and Monographs in Engineering, Water and Earthe Sciences)..

Bastiaens, Wim ; Bernier, Frédéric ; Li, Xiang Ling et al. / An overview of long-term HM measurements around HADES URF. Proceedings of The Internation Symposium of the International Society for rock Mechanics on Multiphysics Coupling and long Term Behaviour in Rock Mechanics. Vol. 1 London, United Kingdom, 2006. pp. 15-26 (Proceedings and Monographs in Engineering, Water and Earthe Sciences).

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abstract = "The underground research facility HADES was constructed to study the feasibility of HLW disposal. Since its operational start 25 years ago numerous instruments were placed in the lining and the surrounding host rock. Some set-ups are operational for over 20 years measuring pore pressure, total pressure or displacements. Displacement measurements enable to assess the displacement during and after excavation works; construction and lining techniques have an influence on the amount of displacement. The short-term response of the host rock put into evidence a strong HM coupling. An anisotropic response and evolution of pore water pressure was observed; this phenomenon was attributed to anisotropy of stress and hydraulic conductivity. The ground pressure on the gallery lining was recorded during several years; it increases fast during the first months after construction and a more gradual increase occurs afterwards. Hydraulic conductivity (k) was measured using several methods at different locations, times and scales. The results of in-situ and laboratory tests are consistent; k is of the order of 10-12 m/s. A hydraulic conductivity increase is observed up to some 6m into the host rock and is attributed to lower effective stress-levels experienced in this zone due to stress-redistribution following the excavation.",

keywords = "long-term measurements, geomechanics, Boom Clay, HADES, coupling",

author = "Wim Bastiaens and Fr{\'e}d{\'e}ric Bernier and Li, {Xiang Ling} and Jan Verstricht",

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Bastiaens, W, Bernier, F, Li, XL & Verstricht, J 2006, An overview of long-term HM measurements around HADES URF. in Proceedings of The Internation Symposium of the International Society for rock Mechanics on Multiphysics Coupling and long Term Behaviour in Rock Mechanics. vol. 1, Proceedings and Monographs in Engineering, Water and Earthe Sciences, London, United Kingdom, pp. 15-26, EUROCK 2006, Multiphysics coupling and long term behaviour in rock mechanics, Liège, Belgium, 2006-05-09.

An overview of long-term HM measurements around HADES URF. / Bastiaens, Wim; Bernier, Frédéric; Li, Xiang Ling et al.
Proceedings of The Internation Symposium of the International Society for rock Mechanics on Multiphysics Coupling and long Term Behaviour in Rock Mechanics. Vol. 1 London, United Kingdom, 2006. p. 15-26 (Proceedings and Monographs in Engineering, Water and Earthe Sciences).

Research output › peer-review

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AB - The underground research facility HADES was constructed to study the feasibility of HLW disposal. Since its operational start 25 years ago numerous instruments were placed in the lining and the surrounding host rock. Some set-ups are operational for over 20 years measuring pore pressure, total pressure or displacements. Displacement measurements enable to assess the displacement during and after excavation works; construction and lining techniques have an influence on the amount of displacement. The short-term response of the host rock put into evidence a strong HM coupling. An anisotropic response and evolution of pore water pressure was observed; this phenomenon was attributed to anisotropy of stress and hydraulic conductivity. The ground pressure on the gallery lining was recorded during several years; it increases fast during the first months after construction and a more gradual increase occurs afterwards. Hydraulic conductivity (k) was measured using several methods at different locations, times and scales. The results of in-situ and laboratory tests are consistent; k is of the order of 10-12 m/s. A hydraulic conductivity increase is observed up to some 6m into the host rock and is attributed to lower effective stress-levels experienced in this zone due to stress-redistribution following the excavation.

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ER -

Bastiaens W, Bernier F, Li XL , Verstricht J. An overview of long-term HM measurements around HADES URF. In Proceedings of The Internation Symposium of the International Society for rock Mechanics on Multiphysics Coupling and long Term Behaviour in Rock Mechanics. Vol. 1. London, United Kingdom. 2006. p. 15-26. (Proceedings and Monographs in Engineering, Water and Earthe Sciences).