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Impact of temperature cyclic variations on bearing capacities of a sensitive soil

Abstract : The incorporation of heat exchangers in geostructures produces a cyclic variation of the temperature in the adjacent soil. Therefore, there are important questions about the effect of temperature variations on hydro-mechanical soil parameters. In this study, the mini-pressuremeter tests were conducted in laboratory on a homogeneous material submitted to different thermal loading (1 to 40 °C). The tested material, an illitic soil, is compacted in a thermo-regulated container at optimal water content (31.3 %) and 90% of maximal dry density (1.29 Mg/m 3). Only six tests are performed in each container to prevent edge effects and the influence between the tests. The impact of temperature variation on creep pressure (pf), limit pressure (pl) and pressuremeter modulus (Ep) were determined. A decrease in creep pressure and limit pressure with increasing temperature was observed, while the variation of pressuremeter modulus was less pronounced. The first cycle induced more important parameter variations than the subsequent cycles.
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https://hal.archives-ouvertes.fr/hal-01817504
Contributor : Sandrine Rosin-Paumier <>
Submitted on : Monday, June 18, 2018 - 9:43:40 AM
Last modification on : Monday, March 29, 2021 - 4:03:10 PM
Long-term archiving on: : Wednesday, September 26, 2018 - 6:04:55 PM

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  • HAL Id : hal-01817504, version 1

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H. Eslami, S. Rosin-Paumier, A. Abdallah, F. Masrouri. Impact of temperature cyclic variations on bearing capacities of a sensitive soil. 3rd European Conference on Unsaturated Soils, Sep 2016, Paris, France. ⟨hal-01817504⟩

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