×

Analysis of a full scale in situ test simulating repository conditions. (English) Zbl 0967.74557

Summary: Coupled thermo-hydro-mechanical (THM) analyses have been used to examine the interacting phenomena associated with the simultaneous heating and hydration of an engineered bentonite barrier placed in a drift excavated in granite. The specific problem studied is an in situ test being carried out in the underground laboratory at Grimsel (Switzerland). After describing the test and the theoretical formulation, the results of a coupled THM analysis using the best parameter estimation currently available are presented and discussed. The effect of various features of analysis are explored by means of additional analyses in which each of those features are varied, one at the time. Finally, sensitivity analyses have been carried out to examine some critical aspects of the in situ test design. Performance of coupled THM analyses has led to a better understanding of the various inter-related phenomena occurring during heating and hydration of the engineered clay barrier.

MSC:

74L10 Soil and rock mechanics
74-05 Experimental work for problems pertaining to mechanics of deformable solids
PDF BibTeX XML Cite
Full Text: DOI

References:

[1] Olivella, Transport in Porous Media 15 pp 271– (1994)
[2] Gawin, Int. J. Numer. Meth. Fluids 20 pp 969– (1995) · Zbl 0854.76052
[3] Thomas, Gétechnique 45 pp 677– (1995)
[4] , , , Grimsel Test Site. Geology, Technical Report 87-14E, Nagra, Baden, Switzerland, 1989.
[5] Panday, Transport in Porous Media 4 pp 369– (1989)
[6] in: Liquids and Solids, Student Physics Series, King’s College, University of London. and , (eds.) 1985.
[7] Edlefson, Hilgardia 15 pp 31– (1943)
[8] Lovell, Q. J. Engng. Geology 18 pp 437– (1985)
[9] van Genuchten, Soil Sci. Soc. Am. J. 49 pp 892– (1980)
[10] Pollock, Water Resources Res. 22 pp 765– (1986)
[11] and , ’State surfaces for partially saturated soils’, Proc. 11th ICSMFE, San Francisco, Vol. 2, 1985, 557-562.
[12] Alonso, Géotechnique 40 pp 405– (1990)
[13] Gens, Can. Geotech. J. 29 pp 1013– (1992)
[14] ’Constitutive laws’, in: Modern Issues in Non-saturated Soils, Springer, Wien, 1995, pp. 129-158.
[15] Olivella, Engng. Comput. 13 pp 87– (1996) · Zbl 0983.74536
[16] ’Modelling and validation of the thermal-hydraulic-mechanical and geochemical behaviour of the clay barrier’. Final Report 1991-1994, CIEMAT, Madrid, 1994.
[17] and , ’Investigation of hydraulic parameters in the saturated and unsaturated zone of the ventilatin drift’, Technical Report 93-10, Nagra, Baden, Switzerland, 1994.
[18] , , and , , ’Heating unsaturated clay–An experimental and numerical investigation’, Proc. 3rd. Eur. Conf. Numerical Meth. in Geomech. Manchester, 1994, pp. 181-186.
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. It attempts to reflect the references listed in the original paper as accurately as possible without claiming the completeness or perfect precision of the matching.