NDLI: Natural and man-made causes for the “Elísio de Moura” earth flow in Coimbra, Portugal

Content Provider	Springer Nature Link
Author	Quinta Ferreira, Mário
Copyright Year	2006
Abstract	The paper reports the 27 December 2000 landslide, which occurred in the city of Coimbra, central Portugal, affecting loose fill soils and slope debris derived from the red sandstone of Triassic age. With urban spread, the base of the hill slope on which farming had taken place over many centuries was terraced to provide residential properties; the excavated material was end-tipped at the top of the slope, modifying the slope gradient from the original 18° to 38°. The loose fill was placed without engineering precautions, directly on to the debris slope material. Following a small slip in 1998, remedial works were undertaken involving large diameter piles anchored into the bedrock. This engineering construction formed the back slope and restricted the extent of the December 2000 landslide, which occurred during a period of unusually heavy rainfall.L’article présente le glissement du 27 décembre 2000 qui s’est produit dans la ville de Coimbra, au Portugal, affectant des remblais meubles et des formations de pente dérivées des grès rouges d’âge triasique. Dans le cadre d’une opération d’urbanisme, la base d’une colline, où des exploitations agricoles ont existé depuis des siècles, a fait l’objet de terrassements en vue d’un aménagement résidentiel. Les matériaux excavés furent déversés au sommet de la pente, modifiant l’angle de pente d’une valeur originale de 18° à 38°. Le remblai meuble fut mis en place sans précaution particulière, directement sur les formations de pente. A la suite d’un petit glissement en 1998, des travaux de confortement furent entrepris, comportant des pieux de grand diamètre ancrés dans le substratum. Ces travaux d’ingénierie permirent de limiter l’extension du glissement de décembre 2000, qui se déclencha pendant une période de pluies intenses inhabituelles.
Starting Page	35
Ending Page	43
Page Count	9
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	66
Issue Number	1
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-06-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Risques naturels Précipitations Glissement de terrain Coulée boueuse Coimbra Nature Conservation Geoecology/Natural Processes Structural Foundations, Hydraulic Engineering Applied Geosciences
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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