Case History: Failure of a Clay Slope Involving Time Effects View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2015

AUTHORS

Håkon Heyerdahl , Hans Petter Jostad , Trond Vernang , Bjørn G. Kalsnes

ABSTRACT

This paper discusses the sudden failure of a clay slope, ca. 3 years after excavation of a ca. 20 m high cut. The landslide had a volume of ca. 15,000 m3 and involved very sensitive clay. A warehouse at the foot of the slope was partly filled with soil, and later collapsed when hit by after-slides from the landslide scarp. Almost miraculously, no humans were present in the building at the time of the landslide. The failure is considered a direct result of the excavation of a cut in the previously stable slope, increasing the slope gradient considerably. The reverse consolidation process initiated by unloading offers an explanation for the time delay of a drained failure. Gradual reduction of effective stress has also resulted in gradual reduction of undrained shear strength due to soil swelling. Another factor possibly contributing to failure is the increased shear stress at the foot of the slope resulting from increased slope gradient. Having verified that very sensitive clay is present close to the foot of the slope, creeping to failure at high levels of mobilization may be a relevant mechanism, possibly contributing to the slope failure. More... »

PAGES

1823-1827

References to SciGraph publications

Book

TITLE

Engineering Geology for Society and Territory - Volume 2

ISBN

978-3-319-09056-6
978-3-319-09057-3

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-319-09057-3_323

DOI

http://dx.doi.org/10.1007/978-3-319-09057-3_323

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005497520


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