Abstract
Potassium chloride was added to low saline Norwegian post glacial clays to study its effect on strength parameters. The laboratory study was carried out on undisturbed sensitive clay samples from two locations in mid-Norway. The mechanical behaviour of sensitive clays is greatly influenced by their pore water ionic content. Adding salt changes the geotechnical properties of quick clay to such an extent that it appears as a total different clay. Salt migration is a time consuming process strongly dependent on diffusion through the soil. Deriving the effective diffusion coefficient from water content of 30–50 %, the clay will be de-sensitized over a length of 50 and 56 cm respectively after 1 year. Ground improvement with salt is done by installing salt wells. This study is part of a design project for such installations. The consumption of time depends on the distance between the wells, diffusion coefficient and maintenance of high concentration in the salt well.
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References
Appelo C, Postma D (2005) Geochemistry, groundwater and pollution, 2nd edn. Balkema, Leiden
Bjerrum L (1955) Norske marine leirers geotekniske egenskaper, NGI publication no. 7. Norwegian Geotechnical Institute, Oslo
Bryhn O (1981) Stabilization of Norwegian quick clay with potassium chloride and lime. NGI report no. 52752–1. Norwegian Geotechnical Institute, Oslo
Eggestad A, Sem H (1976) Stability of excavations improved by salt diffusion from deep wells. Sechste Europaeische Konferenz Fuer Bodenmechanik Und Grundbau, vol 1
Kornbrekke H (2012) Skråningsstabilitet ved Rein kloster med utgangspunkt i resultater fra blokkprøver. Master thesis. Norwegian University of Science and Technology, Trondheim
Løken T (1968) Kvikkleiredannelse og kjemisk forvitring i norske leirer, NGI publication no. 75. Norwegian Geotechnical Institute, Oslo
Løken T (1970) Recent research at the Norwegian Geotechnical Institute concerning the influence of chemical additions on quick clay. Geologiska Föreningen i Stockholm Förhandlingar 92(2):133–147
Mitchell JK, Soga K (2005) Fundamentals of soil behavior, 3rd edn. Wiley, New York
Moum J, Heiberg S (1973) An experimental determination of the diffusion constant for high in situ salt concentrations in Norwegian marine clays. NGI internal report no. 50703–2. Norwegian Geotechnical Institute, Oslo
Moum J, Sopp OI, Løken T (1968) Stabilization of undisturbed quick clay by salt wells, NGI publication no. 81. Norwegian Geotechnical Institute, Oslo
Quigley RM (1980) Geology, mineralogy and geochemistry of Canadian soft soils: a geotechnical perspective. Can Geotech J 9:261–285
Rankka K, Andersson-Sköld Y, Hultén C, Larsson R, Leroux V, Dahlin T (2004) Quick clay in Sweden. SGI report no. 65. Swedish Geotechnical Institute, Linköping
Rosenqvist IT (1946) Om leirers kvikkaktighet. Medd.f. Vegdirektoren 4: 29–36
Rosenqvist IT (1953) Consideration on the sensitivity of Norwegian quick-clays. Geotechnique 3:195–200
Rosenqvist IT (1955) Investigations in the clay-electrolyte-water system, NGI publication no. 9. Norwegian Geotechnical Institute, Oslo
Rosenqvist IT (1975) Origin and mineralogy glacial and interglacial clays of Southern Norway. Clay Clay Miner 23:153–159
Talme O, Pajuste M, Wenner C-G (1966) Secondary changes in the strength of clay layers and the origin of sensitive clay. Rapport – Byggforskningsrådet, vol 46
Torrance JK (1983) Towards a general model of quick clay development. Sedimentology 30:547–555
Torrance JK (2012) Landslides in quick clay. In: Clague JJ, Stead D (eds) Landslides – types, mechanisms and modeling. Cambridge University Press, Cambridge
Acknowledgments
The authors would like to thank the Norwegian Geotechnical Society and the research program “Natural Hazards”: Infrastructure for floods and slides (NIFS) initiated by the Norwegian Public Roads Administration, Norwegian Water Resources and Energy Directorate and Norwegian National Railways Administration for funding this project. Prof. Yudhbir is thanked for his valuable comments on the manuscript. We would also like to thank Elisabeth Gundersen, Vikas Thakur, Frode Oset, Tor Løken, Odd Gregersen, Eirik Traae and Steinar Nordal for good discussions, in addition to the great effort carried out by the field- and laboratory staff at NTNU Geotechnical Research Group Jan Jønland and Gunnar Winther.
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Helle, T.E., Gjengedal, I., Emdal, A., Aagaard, P., Høydal, Ø. (2014). Potassium Chloride as Ground Improvement in Quick Clay Areas – A Preliminary Study. In: L'Heureux, JS., Locat, A., Leroueil, S., Demers, D., Locat, J. (eds) Landslides in Sensitive Clays. Advances in Natural and Technological Hazards Research, vol 36. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-7079-9_6
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DOI: https://doi.org/10.1007/978-94-007-7079-9_6
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