References of "Bautista, Miguel"
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See detailLandslides in urban areas of Luxembourg, caused by weak Rheatian Clay
Van Baars, Stefan UL; Bautista, Miguel; Becker, Rolf

in Lollino; Manconi; Guzzetti (Eds.) et al Engineering Geology for Society and Territory Volume 5 (2014, September)

Luxembourg is geologically divided into two parts: Oesling in the North and Gut-land in the Middle and South. Oesling is part of the Ardennes plateau. Gutland was formed in the Triassic and Jurassic ages ... [more ▼]

Luxembourg is geologically divided into two parts: Oesling in the North and Gut-land in the Middle and South. Oesling is part of the Ardennes plateau. Gutland was formed in the Triassic and Jurassic ages and is much younger than Oesling. It consists mainly of sedimentary rocks. Luxembourg has a variety of interesting, weak or problematic soils, such as the swelling gypsum layers, the layered schists of Wiltz and especially the weak Keu-per-Rhaetian-clay. The Rhaetian clay layer is mostly rather thin and is found at a relatively constant altitude and the band where it comes to the surface is identified by the varying erosion erratically found throughout Gutland. Approximately two third of all landslides are found along this line. Hence it was decided to investigate the Rhaetian clay in the geotechnical laboratory of the University of Luxembourg. Samples were taken from a pit at Rue de Mühlenbach on the north side of the city of Luxembourg and from a sliding slope of a building pit in Schutrange. The friction angle was found to be 8° at Mühlenbach and 3° at Schuttrange, which are both record low friction angles, which explains the high number of landslides in Luxembourg. [less ▲]

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See detailDe Luxemburgse bodem en de zwakke Rhät klei
Van Baars, Stefan UL; Becker, Rolf; Bautista, Miguel

in Geotechniek (2013)

Luxemburg kent zeer interessante, zwakke en problematische bodemsoorten zoals de zwellende gips, de gelaagde schist van Wiltz en vooral de zwakke Keuper-Rhät-klei. Die laatste komt als een dun laagje in ... [more ▼]

Luxemburg kent zeer interessante, zwakke en problematische bodemsoorten zoals de zwellende gips, de gelaagde schist van Wiltz en vooral de zwakke Keuper-Rhät-klei. Die laatste komt als een dun laagje in een groot deel van het land aan de oppervlakte. Ongeveer 2/3de deel van alle grondafschuivingen spelen zich hier af. Vandaar dat besloten is om de Rhät-klei te onderzoeken. Uit triaxiaalproeven die in het geotechnisch laboratorium van de Universiteit van Luxemburg gedaan zijn, blijkt dat deze klei een zeer kleine hoek van inwendige wrijving heeft en daardoor tot de zwakste kleien ter wereld gerekend mag worden. [less ▲]

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