Options
On the potential of gassy marine soils triggering submarine slope instabilities
Citation Link: https://doi.org/10.15480/882.3257
Publikationstyp
Conference Paper
Date Issued
2020-11-18
Sprache
English
Author(s)
Herausgeber*innen
Institut
TORE-DOI
TORE-URI
First published in
Number in series
205
Article Number
12006
Citation
E3S Web of Conferences (205): 12006 (2020-11-18)
Contribution to Conference
Publisher DOI
Scopus ID
The development of debris flows and turbidity currents in the course of a submarine slope failure event can cause major damage in offshore infrastructure. Additionally, the tsunamogenic potential of large slope failures at continental margins poses a direct threat to coastal communities. Therefore, the trigger mechanisms of submarine slope failures have been thoroughly investigated in the past. However, the influence of free gas in the sediment, which has been observed close to several slide events, remains unexplained. In order to evaluate the potential of gassy marine soils to precondition or trigger slope failure the mechanical behaviour of gassy soils is assessed based on an extensive literature review. It is found that gas-induced excess pore pressures can lead to liquefaction failure in sands, while cohesive, gassy soils show a less conclusive response. Hence, fine-grained soils and approaches to implement the gas impact into relevant existing constitutive soil models are assessed in greater detail. Concludingly, based on the predominant boundary conditions in failure prone regions at the continental margins, free gas occurrence can be defined as a preconditioning factor rather than as a definite trigger mechanism.
DDC Class
550: Geowissenschaften
600: Technik
Publication version
publishedVersion
Loading...
Name
e3sconf_icegt2020_12006.pdf
Size
4.08 MB
Format
Adobe PDF