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Pore pressure response in the upper open aquifer - Field investigations and modelling
Swedish Geotechnical Institute.
2016 (English)In: Proceedings of the 17th Nordic Geotechnical Meeting, NGM 2016, Reykjavik, Iceland, 25-28 May, 2016, Reykjavik: Icelandic Geotechnical society , 2016, p. 1173-1182Conference paper, Published paper (Refereed)
Abstract [en]

For many slopes in clay where the stability is unsatisfactory, high pore pressures is one of the main potential factors triggering a shallow landslide. During rainfall water infiltrates into the soil, which cause a decrease in soil strength, which can be crucial and decisive for whether the slope fails or not. The pore pressure distribution in the slope is part of the data needed for modelling the stability. A question of great importance, and where there is a lack of knowledge today, is regarding the variation of the pressure in the upper 10 meters of the soil profile during different rainfall scenarios, in the short as well as during the long term. The pore pressure in this zone is often crucial for the stability, as the pore pressure to a great extent governs the strength of the soil at these shallow depths. The pore pressure must not be underestimated as the prediction then would be on the unsafe side indicating a fictitiously high factor of safety. When a detailed slope stability analysis is made, including expected climate change, reliable pore pressure predictions are important from an economical point of view. Pore pressure, rainfall and water levels in the nearby rivers have been measured for a long period in two test sites in south-western Sweden. This paper presents an analysis of the measurements and seepage modelling using a commercial seepage modeling software. A better and more reliable prediction of the pore pressure in the entire soil profile, and thereby improving the validity of the stability analysis, can be obtained by using the results presented in this paper together with earlier research.

Place, publisher, year, edition, pages
Reykjavik: Icelandic Geotechnical society , 2016. p. 1173-1182
Keywords [en]
Clay, Slope, Stability, Rainfall, Precipitation, Aquifer, Pore pressure, Depth factor, Model, Conference, Reykjavik, 2016, English
National Category
Geotechnical Engineering
Identifiers
URN: urn:nbn:se:swedgeo:diva-813Local ID: 000084249OAI: oai:DiVA.org:swedgeo-813DiVA, id: diva2:1359450
Conference
17th Nordic Geotechnical Meeting, NGM 2016, Reykjavik, Iceland, 25-28 May, 2016
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-10-09

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
  • text
  • asciidoc
  • rtf