Mapping of quick clay formations using geotechnical and geophysical methods

Lundström, Karin; Larsson, Rolf; Dahlin, Torleif

doi:10.1007/s10346-009-0144-9

Cited by 72 publications

(28 citation statements)

References 14 publications

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“…Donohue et al (2011) and Pffaffhuber et al (2010) detail integrated geophysical work with similar objectives for a site at Smørgrav in Southern Norway and Sauvin et al (2011) outline comparable work at an adjacent site at Vålen. Similar work in Sweden has been published by Dahlin et al (2005), Lundström et al (2009) and Löfroth et al (2011).…”

Section: Introductionsupporting

confidence: 84%

Relationship between electrical resistivity and basic geotechnical parameters for marine clays

Long

Donohue

L’HeureuxJean-Sebastien

et al. 2012

Can. Geotech. J.

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Section: Introductionsupporting

confidence: 84%

Relationship between electrical resistivity and basic geotechnical parameters for marine clays

Long

Donohue

L’HeureuxJean-Sebastien

et al. 2012

Can. Geotech. J.

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“…However, stepping down to transmission of lower currents negatively affects the signal-to-noise ratio (S/N), with implications for data quality. Several authors have argued that high grounding resistances reduced the quality of measurements (Dabas et al, 2000;Baines et al, 2002;Lundström et al, 2009;Hilbich et al, 2011;Rosset et al, 2013) using it as an indicator of data quality in some cases (Branco et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effect of electrode shape on grounding resistances — Part 2: Experimental results and cryospheric monitoring

et al. 2016

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Although electric resistivity tomography (ERT) is now regarded as a standard tool in permafrost monitoring, high grounding resistances continue to limit the acquisition of time series over complete freeze-thaw cycles. In an attempt to alleviate the grounding resistance problem, we have tested three electrode designs featuring increasing sizes and surface area, in the laboratory and at three different field sites in Greenland. Grounding resistance measurements showed that changing the electrode shape (using plates instead of rods) reduced the grounding resistances at all sites by 28%–69% during unfrozen and frozen ground conditions. Using meshes instead of plates (the same rectangular shape and a larger effective surface area) further improved the grounding resistances by 29%–37% in winter. Replacement of rod electrodes of one entire permanent permafrost monitoring array by meshes resulted in an immediate reduction of the average grounding resistance by 73% from [Formula: see text] to [Formula: see text] (unfrozen conditions); in addition, the length of the acquisition period during the winter season was markedly prolonged. Grounding resistance time series from the three ERT monitoring stations in Greenland showed that the electrodes were rarely perfectly grounded and that grounding resistances exceeding [Formula: see text] may occur in severe cases. We concluded that the temperature, electrode shape, and lithology at the sites have a marked impact on electrode performance. Choosing an optimized electrode design may be the deciding factor for successful data acquisition, and should therefore be considered when planning a long-term monitoring project.

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“…These areas have been affected by isostatic uplift, leaving the clay deposits located above sea level and subjected to salt leaching. This process generated quick clays that have been involved in numerous large clay slides (Lundström et al, 2009). Also, glaciolacustrine environments are famous for creating irregular clay deposits and favorable conditions for landslides in previously glaciated areas such as the Alps (Giraud et al, 1991;Jongmans et al, 2009) or the Baltic Sea (Kohv et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Paleotopographic control of landslides in lacustrine deposits (Trièves plateau, French western Alps)

et al. 2011

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International audiencePaleotopography in Quaternary sedimentary environments can be an important factor that controls landslide movement. This study investigates the relation between paleotopography and landslide activity in two adjacent landslides in glaciolacustrine sediments located in the Trièves area (French western Alps). Although both are in slopes underlain by the same lacustrine deposits, the Avignonet and Harmalière landslides exhibit major differences in morphology and displacement rates. Through a combination of geological mapping, airborne light detection and ranging (LiDAR) data, aerial photographs, global positioning system (GPS), and seismic noise measurements, a three-dimensional impression was made of both landslides. The analysis reveals that the difference in kinematics between the two mass movements can be traced back to at least 50 years ago. The results show that the Harmalière slide, which failed catastrophically in 1981, is still much more active than the Avignonet landslide. The fear was that the Avignonet landslide might develop in a similar catastrophic manner, threatening a number of houses constructed on the landslide. A geophysical survey based on ambient noise measurements allowed us to map the base of the lacustrine clays, and the results indicate the presence of a N-S ridge of hard sediments (Jurassic bedrock and/or compact alluvial layers) on the eastern side of the Avignonet landslide. This ridge disappears when approaching the Harmalière landslide and makes a place to what can be interpreted as a NW-SE oriented paleovalley of the river Drac. We proposed that the ridge acts as a buttress that could mechanically prevent the Avignonet landslide from evolving as fast as the Harmalière. Furthermore, the NW-SE paleovalley located under the Harmalière landslide corresponds to the motion direction of the slide. Therefore, the different behaviour of the two landslides is partly controlled by the paleotopographic setting of Lake Trièves during the last Glacial Maximum extension. These results suggest a major influence of the bedrock paleotopography on the kinematics of the landslides

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Mapping of quick clay formations using geotechnical and geophysical methods

Cited by 72 publications

References 14 publications

Relationship between electrical resistivity and basic geotechnical parameters for marine clays

Relationship between electrical resistivity and basic geotechnical parameters for marine clays

Effect of electrode shape on grounding resistances — Part 2: Experimental results and cryospheric monitoring

Paleotopographic control of landslides in lacustrine deposits (Trièves plateau, French western Alps)

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