Skip to Main content Skip to Navigation
Journal articles

Suction effects in deep Boom clay block samples

Abstract : Extensive investigations have been and are being carried out on a stiff clay from an underground research laboratory located at Mol (Belgium) called Boom clay, in the context of research into deep nuclear waste disposal. Suction effects in deep Boom clay block samples were investigated through the characterisation of the water retention and of the swelling properties of the clay. The data obtained allowed an estimation of the sample initial suction that was reasonably compatible with the in-situ state of stress at a depth of 223 m. The relationship between suction and stress changes during loading and unloading sequences were also examined by running oedometer tests with suction measurements. A rather wide range of the ratio s/σ'v (being s the suction and σ'v the effective vertical stress) was obtained (0.61 - 1), different from that proposed by Bishop et al; (1974). Finally, the effect of suction release under an isotropic stress close to the estimated sample suction was investigated. A slight swelling (1.7%) was observed and further compression provided a satisfactory value of the overconsolidation ratio confirming the suggestions of taking some precautions before putting a swelling sample in contact with water as suggested by Graham et al. (1987). The various experimental data gathered in this study finally evidenced a relatively good state of conservation of the block sample used.
Complete list of metadatas

Cited literature [24 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00204528
Contributor : Yu-Jun Cui <>
Submitted on : Monday, January 14, 2008 - 4:54:35 PM
Last modification on : Monday, January 11, 2021 - 10:22:04 AM
Long-term archiving on: : Tuesday, April 13, 2010 - 5:35:28 PM

File

Geotechnique_TN_Delage_et_al.p...
Files produced by the author(s)

Identifiers

Citation

Pierre Delage, Trung Tinh Le, Anh Minh Tang, Yu-Jun Cui, Xiang-Ling Li. Suction effects in deep Boom clay block samples. Géotechnique, Thomas Telford, 2007, 57 (1), pp.239-244. ⟨10.1680/geot.2007.57.10.862⟩. ⟨hal-00204528⟩

Share

Metrics

Record views

372

Files downloads

498