Application of 2D electrical and seismic tomography techniques for investigating landslide sites

Jongmans, Denis; Demanet, D.; Havenith, Hans-Balder; Hemroulle, P.

doi:10.3997/2214-4609.201406464

Cited by 20 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Four main different situations can occur. In the first case, geophysical contrasts are due to the lithological changes (layering, tectonic contact or pre-slide weathering) and the failure surface mainly coincides with a geological interface or layer [Batayneh and al Diabat, 2002;Glade et al, 2005;Jongmans et al, 2000;Agnesi et al, 2005;Havenith et al, 2000;Wisen et al, 2003]. In the second case, geophysical contrasts are also controlled by lithological variations but the failure surface cuts the structure in a more complex way and may be or not deduced from the geophysical image [Bichler et al, 2004;Ferrucci et al, 2000;Mauritsch et al, 2000;Demoulin et al, 2003], depending on the landslide velocity, the heterogeneity of the material and the resolution of the technique.…”

Section: Geophysical Methods: An Overviewmentioning

confidence: 99%

“…Compared to classical seismic refraction, the technique requires much more travel-time data and field effort, but allows lateral P-wave velocity variations to be determined. For landslide investigation, the technique was used in rock conditions Jongmans et al, 2000] and showed a significant decrease of P-wave velocity values (division by at least a factor 2) in the slide-prone or unstable mass. performed a 300 m long seismic profile across the western limit of the large "Séchilienne " landslide (French Alps) affecting micaschists.…”

Section: Seismic Tomographymentioning

confidence: 99%

See 1 more Smart Citation

Geophysical investigation of landslides : a review

Jongmans

Garambois

2007

Bulletin De La Société Géologique De France

323

176

View full text Add to dashboard Cite

Abstract. -In the last two decades, shallow geophysics has considerably evolved with the emergence of 2D spatial imaging, then 3D spatial imaging and now 4D time and space imaging. These techniques allow the study of the spatial and temporal variations of geological structures. This paper aims at presenting a current state-of-the-art on the application of surface geophysical methods to landslide characterization and focuses on recent papers (after 1990) published in peer-reviewed International Journals. Until recently, geophysical techniques have been relatively little used for the reconnaissance of landslides for at least two main reasons. The first one is that geophysical methods provide images in terms of physical parameters which are not directly linked to the geological and mechanical properties required by geologists and engineers. The second reason shown through this study probably comes from a tendency among a part of the geophysicists to overestimate the quality and reliability of the results. This paper gave the opportunity to review recent applications of the main geophysical techniques to landslide characterisation, showing both their interest and their limits. We also emphasized the geophysical image characteristics (resolution, penetration depth) which have to be provided for assessing their reliability, as well as the absolute requirements to combine geophysical methods and to calibrate them with existing geological and geotechnical data. We hope that this paper will contribute to fill the gaps between communities and to strength of using appropriate geophysical methods for landslide investigation. Reconnaissance géophysique des glissements de terrain : Etat de l'artMots clés. -Glissements de terrain, Investigations géophysiques, Etat de l'art Résumé. -Depuis 20 ans, la prospection géophysique à faible profondeur a considérablement évolué avec l'apparition de techniques d'imagerie 2D (x,z), puis 3D (x,y,z) et maintenant 4D (x,y,z,t), qui permettent de considérer les variations spatiales et temporelles des objets géologiques étudiés. A partir de la littérature internationale, nous tentons de faire une synthèse sur l'application des méthodes géophysiques à l'étude et au suivi des mouvements de terrain qui sont des structures complexes et évolutives. Paradoxalement, il apparaît que l'utilisation des techniques géophysiques pour la reconnaissance des mouvements de terrain est restée jusque récemment relativement limitée pour deux raisons principales. La première vient de la réticence d'une partie des ingénieurs et des géologues d'appliquer des techniques complexes qui ne fournissent pas des données géologiques, hydrogéologiques ou mécaniques directement utilisables. La seconde raison, apparue lors de cette étude, résulte de la tendance d'une partie de la communauté géophysique de surestimer la qualité et la fiabilité des résultats obtenus. A travers cette synthèse des publications, nous passons en revue les applications récentes des principales méthodes géophysiques aux mouvements de terrain en illust...

show abstract

Section: Geophysical Methods: An Overviewmentioning

confidence: 99%

Section: Seismic Tomographymentioning

confidence: 99%

Geophysical investigation of landslides : a review

Jongmans

Garambois

2007

Bulletin De La Société Géologique De France

323

176

View full text Add to dashboard Cite

show abstract

“…Since these approaches only provide limited information on the depth distribution of geological structures, a variety of surface-based geophysical techniques have recently been employed in landslide and rockfall studies (McCann and Forster, 1990;Hack, 2000). Various combinations of ground-penetrating radar (georadar), seismic reflection, seismic refraction, electrical resistivity, self-potential and electromagnetic methods have been used to determine the geometries of failure planes and volumes of unstable rock (Bruno and Marillier, 2000;Cummings, 2000;Havenith et al, 2000;Jongmans et al, 2000;Schmutz et al, 2000;DussaugePeisser et al, 2003). In areas of crystalline rock distinguished by ubiquitous fractures and faults, the high-resolution capabilities of surface-based georadar methods have proven to be particularly useful.…”

mentioning

confidence: 98%

Characterization of an unstable rock mass based on borehole logs and diverse borehole radar data

Spillmann¹,

Maurer²,

Willenberg

et al. 2007

Journal of Applied Geophysics

View full text Add to dashboard Cite

“…Indeed, seismic and GPR tomography have been widely used to investigate rock masses (e.g. Ivanson, 1987;Hollender, 1999;Demanet, 2000;Jongmans et al, 2000). Although crosshole transmission tomography is the most widespread method (Ivanson, 1987;Bois et al, 1972;Corin et al, 1997), surface tomography (all sources and receivers located at the ground surface) is increasingly used, to avoid expensive drilling costs or destructive investigations (Liu et al, 1998;Lanz et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Multiconfiguration GPR measurements for geometric fracture characterization in limestone cliffs (Alps)

et al. 2006

View full text Add to dashboard Cite

Until now, geophysical methods have been rarely used to investigate vertical limestone cliffs, mainly due to the extreme conditions for data acquisition. Nevertheless, these techniques are the only available methods which could provide information on the internal state or a rock mass in terms of discontinuities, which play a major role in rock-fall hazards. In this case study, detailed GPR measurements were carried out on a test site with different acquisition configurations deployed on vertical cliff faces. Conventional 2D profiles, common midpoints (CMP) and transmission data were acquired to evaluate the potential of radar waves to improve the characterization of the geometry and properties of the main discontinuities (fractures) within the massif. The results show that the 3D geometry of fractures, which is a crucial parameter for stability assessment, can be retrieved by combining vertical and horizontal profiles performed along the cliff. CMP profiles acquired along the cliff allow a velocity profile to be obtained as a function of depth. Finally, transmission experiments, which generate complex radargrams, have provided valuable and quantitative information on the rock mass, through the modelling of the waves generated. On the other hand, a velocity tomography obtained from the first arrivals travelling through the rock mass from the transmitters to the receivers, shows an image of the investigated zone with a poor resolution

show abstract

Application of 2D electrical and seismic tomography techniques for investigating landslide sites

Cited by 20 publications

References 0 publications

Geophysical investigation of landslides : a review

Geophysical investigation of landslides : a review

Characterization of an unstable rock mass based on borehole logs and diverse borehole radar data

Multiconfiguration GPR measurements for geometric fracture characterization in limestone cliffs (Alps)

Contact Info

Product

Resources

About