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Natural thermal strains close to surface of rock slopes. Measurement and modeling of the "Rochers de Valabres" case

Abstract : Natural temperature variations are often are thought to play a role in slope instabilities. For several years, in situ thermo-mechanical measurements have monitored the "Rochers de Valabres" (Alpes-Maritimes, France) site to examine thermomechanical surface phenomena based on in situ measurements. First, a description of the experimental site is presented in this paper. Eight CSIRO cells grouped in three stations were installed at different depths varying from 0 to 50 cm. To understand CSIRO cell strains under temperature variations, analytical solutions and modelling of the problem of a boreholesitu data were analysed based on these computations. If the order of magnitude of the strain measurements is quite similar to those computed, confirming the computed phenomena, an accurate analysis of the data is difficult due to several instrumental problems: drift, the influence of the temperature on the CSIRO cell itself, and the variation in the time of the gauge behaviour. The influence of the CSIRO cell deformability on the measurements was modelled and confirmed through laboratory tests and modelling.
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  • HAL Id : ineris-00973603, version 1
  • INERIS : EN-2010-416

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Véronique Merrien-Soukatchoff, Yann Gunzburger, Cécile Clement. Natural thermal strains close to surface of rock slopes. Measurement and modeling of the "Rochers de Valabres" case. Stabilité des versants rocheux. Rock Slope Stability (RSS 2010), Nov 2010, Paris, France. pp.18. ⟨ineris-00973603⟩

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