Modelling free gas overpressure in peat layers

Stefano Muraro*, Cristina Jommi

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

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Abstract

The paper assesses fully coupled hydro-mechanical numerical approaches developed for unsaturated soils to model the effect of free gas overpressure on the response of peat layers. A simple linear model is used for the soil skeleton, however, the global response is non-linear due to changes over time of the compressibility of the solid skeleton over the compressibility of the fluid, and solubility of gas in water. The overpressure generated in foundation peat layers by barometric pressure oscillations is modelled, and the results are compared to literature data. The development of pore overpressure upon unloading is analysed as a function of the soil skeleton compressibility, and the consequences on the average stress acting on the soil skeleton are discussed.

Original languageEnglish
Article number02027
Pages (from-to)1-6
Number of pages6
JournalE3S Web of Conferences
Volume195
DOIs
Publication statusPublished - 2020
Event4th European Conference on Unsaturated Soils, E-UNSAT 2020 - Lisboa, Portugal
Duration: 19 Oct 202021 Oct 2020

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