Journal Title
Title of Journal: Bull Eng Geol Environ
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Abbravation: Bulletin of Engineering Geology and the Environment
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Publisher
Springer-Verlag
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Authors: Marcel Arnould
Publish Date: 2006/08/01
Volume: 65, Issue: 4, Pages: 413-
Abstract
Although usually masked by a veneer of weathered products a discontinuity network has been observed in mudstones dated from the Lower Cambrian to the Miocene principally in pits and quarries Its origin is attributed to an early hydraulic fracturing of the initial muds with their drainage and progressive compaction In contrast no natural discontinuities have been observed in the galleries of underground nuclear waste laboratories in Boom Clays at Mol Belgium and in Opalinus Clays at Mont Terri Switzerland or in deep reconnaissance borings However the observations were made immediately after the works At depth natural discontinuities are closed by the stress field As there is no cement and with the temperatures of diagenesis being too low to allow any recrystallization they are sealed but not healed They could reopen with the release of stress and/or desiccationBien qu’usuellement masquées par une couverture de produits d’altération des discontinuités de type diaclases ont été observées dans des mudstones argilessilts marnes marines du Cambrien inférieur au Miocène principalement dans des carrières On les attribue à la fracturation hydraulique précoce des vases originelles avec drainage et compaction progressive En contraste aucune discontinuité naturelle n’est signalée dans les galeries des laboratoires souterrains pour étude du stockage de déchets nucléaires dans les Boom Clays à Mol Belgique et les Opalinus Clays au Mont Terri Suisse ni dans les sondages de reconnaissance Les observations ayant été faites aussitôt après les travaux les discontinuités naturelles restent probablement fermées par le champ de contraintes En l’absence de ciment et avec des températures de diagénèse trop faibles pour permettre une recristallisation elles demeurent susceptibles de se rouvrir en cas de relâchement prolongé des contraintes et/ou dessication
Keywords:
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Other Papers In This Journal:
- Comparison of the geotechnical properties of crushed shales from Southeastern Nigeria
- GIS-based landslide susceptibility mapping with logistic regression, analytical hierarchy process, and combined fuzzy and support vector machine methods: a case study from Wolong Giant Panda Natural Reserve, China
- Interactions of overburden failure zones due to multiple-seam mining using longwall caving
- Comparison of undrained shear strength by pressuremeter and other tests, and numerical assessment of the effect of finite probe length in pressuremeter tests
- Predicting mechanical properties of mudrock from index parameters
- Assessment of the adhesion potential of kaolinite and montmorillonite using a pull-out test device
- The unique relationship between swell percent and swell pressure of compacted clays
- Influence of rock cradle block geometry on rebound hardness
- BHE logging and cement hydration heat analyses for the determination of thermo-physical parameters
- Landslide investigations in the northwest section of the lesser Khingan range in China using combined HDR and GPR methods
- Evaluation of surface settlements in the Istanbul metro in terms of analytical, numerical and direct measurements
- The geological strength index: applications and limitations
- Vulnerability assessment for reinforced concrete buildings exposed to landslides
- “Plagioclase solution degree index”: a new index to evaluate the weathering degree of granite
- Evaluation of waste embankment slope stability: Valea Manastirii, Gorj, Romania
- Evaluation of subsurface spatial variability in site characterization based on RCPTU data
- Assessment of the earthquake potential of the west Aegean region of Turkey based on seismicity, tectonics, crustal deformation and geo-archaeological evidence and its geotechnical aspects
- The effect of frost weathering at the dinosaur tracksite in Seoyu-ri, Hwasun, Korea
- Stabilisation of old lignite pit dumps in Eastern Germany
- Significance of outward dipping strata in argillaceous limestones in the area of the Three Gorges reservoir, China
- Slope stability problems of the weak rocks in the Asarsuyu pass of the Anatolian motorway
- Landslide susceptibility zonation study using remote sensing and GIS technology in the Ken-Betwa River Link area, India
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