Abstract
When determining the stability of slopes, engineers use the parameters required by the calculation model. The most important properties of soil are its friction angle, density and cohesion. If a steep slope is covered with vegetation or even a century-old forest on an embankment, the values of these properties will change, due to the climate, relief and many organisms associated with the vegetation. It is these factors that make soils as described in soil science, which examines the processes of soil formation and describes many parameters other than its physical properties. Soil’s physical properties mainly apply to fine soil, with a particle size of less than 2 mm. Larger components are referred to as skeleton. In geotechnics, fractions smaller than 2 mm are described as sand, silt or clay, whereas larger components are called gravel. The differences between them mainly have to do with their quantitative characterisation: soil scientists use volume-based percentages and geotechnicians mass-based percentages. These two values cannot be compared directly, but also depend on the soil’s porosity and density as well as on the density of its solid substance. This article provides practical examples of the relationships between the various parameters and highlights the major differences between results obtained from a soil science point of view and from a geotechnical perspective. The physical properties of the forest soils presented here mainly relate to their density, porosity, water content and particle size distribution in the Swiss Prealps.
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References
Bezzola G.R., Hegg C. (Ed.): Ereignisanalyse Hochwasser 2005, Teil 1—Prozesse, Schaeden und erste Einordnung. Swiss Federal Office for the Environment (BAFU), Federal Institute for Forest, Snow and Landscape Research (WSL), Environmental knowledge, no. 0707, 215 pages 2007
Bezzola, G.R., Hegg, C. (Ed.): Ereignisanalyse Hochwasser 2005 Teil 2—Analyse von Prozessen, Massnahmen und Gefahrengrundlagen. Swiss Federal Office for the Environment (BAFU), Federal Institute for Forest, Snow and Landscape Research (WSL), Environmental knowledge no. 0825, 429 pages (2008)
Rickli C. (Red.): Vegetationswirkungen und Rutschungen—Untersuchungen zum Einfluss der Vegetation auf oberflaechennache Rutschprozelle anhand der Unwetterereignisse in Sachseln OW am 15. August 1997. Birmensdorf, Bern; Federal Institute for Forest, Snow and Landscape Research (WSL), Swiss Agency for the Environment, Forests and Landscape (SAEFL), 97 pages (2001)
Rickli, C., Bucher, H.: Oberflaechennahe Rutschungen im Napfgebiet und im Gebiet Appenzell. Project report submitted to the Swiss Federal Office for Water and Geology (BWG), 96 pages (2003)
Rickli, C., Kamm, S., Bucher, H.: Ereignisanalyse Hochwasser 2005 Teilprojekt Flachgruendige Rutschungen. Project report submitted to the Swiss Federal Office for the Environment (BAFU), Hazard Prevention Division; 114 pages (2008)
VSS 2011: Geotechnische Erkundung und Untersuchung—Geotechnische Kenngroessen. Swiss standard SN 670 010. Swiss Association of Road and Traffic experts (VSS), 19 pages
VSS: Identifikation der Lockergesteine—Labormethoden mit Klassifikation nach USCS. Swiss standard SN 670 008a. Swiss Association of Road and Traffic experts (VSS), 16 pages (1997)
Walthert, L., Zimmermann, S., Blaser, P., Luster, J.L., Luescher P.: Waldboeden der Schweiz. Band 1. Grundlagen und Region Jura. Birmensdorf, Federal Institute for Forest, Snow and Landscape Research (WSL). Bern, Hep Verlag, 768 pages (2004)
Zimmermann, S., Luster, J., Blaser, P., Walthert, L. Luescher, P.: Waldboeden der Schweiz. Band 3. Regionen Mittelland und Voralpen. Birmensdorf, Federal Institute for Forest, Snow and Landscape Research (WSL), Bern, Hep Verlag, 848 pages (2006)
Acknowledgements
The Author thanks the Project “REVENUES” for supporting and funding this research: Marie Curie Actions of the European Union’s Seventh Framework Programme FP7-PEOPLE-2012-IAPP (grant agreement n° 324466).
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Gerber, W. (2019). Combination of Decisive Properties of Soil in Science and Geotechnics. In: Wu, W. (eds) Recent Advances in Geotechnical Research. Springer Series in Geomechanics and Geoengineering. Springer, Cham. https://doi.org/10.1007/978-3-319-89671-7_5
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DOI: https://doi.org/10.1007/978-3-319-89671-7_5
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