Geophysical investigations of large landslides in the Carnic Region of southern Austria

Mauritsch, Hermann Johann; Seiberl, Wolfgang; Arndt, Ranier; Römer, A.; Schneiderbauer, Klaus; Sendlhofer, Gernot P

doi:10.1016/s0013-7952(99)00120-9

Cited by 92 publications

(61 citation statements)

References 7 publications

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“…The geophysical contrast is then related to the cumulated or individual effects of the mechanical dislocation, the alteration and/or the increase of water content. Geophysical surveys applied to ground movements can be used to estimate the lateral extent of the landslide, the depth to the failure surface [7,8]; and also to detect water in the active mass [9].…”

Section: Introductionmentioning

confidence: 99%

Geophysical and Geotechnical Investigations of a Landslide in Kekem Area, Western Cameroon

Epada¹,

Ganno²,

Tabod³

2012

IJG

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Geophysical and geotechnical surveys were conducted in the Western Cameroon (Kekem area) following a landslide on argillaceous material in order to understand the triggering processes and mechanisms of this landslide and to assess the stability of the slope. The geophysical soundings consisting of vertical electrical soundings with the Schlumberger electrode array configuration were carried out to monitor the behaviour of electrical resistivity in the landslide. Geoelectrical data showed a zone of low resistivity values identified as a clayey sand-filled aquifer. This aquifer played an important role in the triggering process of the landslide. Geotechnical soundings showed that the aquifer had a thickness of 7.0 m. The depth from the landslide crest level to the failure surface reached 3.0 m and 20.6 m. Laboratory tests were then carried out in order to evaluate the cohesion of the soil and the angle of internal friction, and to calculate the safety factor in view of making a stability analysis. The laboratory results exhibited a soil with low consistency, almost doughy. The mean value of the safety factor (1.4) been lower than the slope stability coefficient (1.5), revealed that the slope is unstable, likely to know at any moment a reactivation of the slide. This study showed that electrical soundings coupled with geotechnical surveys are useful tools for the characterization of landslides.

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Section: Introductionmentioning

confidence: 99%

Geophysical and Geotechnical Investigations of a Landslide in Kekem Area, Western Cameroon

Epada¹,

Ganno²,

Tabod³

2012

IJG

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“…However, the successful performance of geophysical method may relative to fundamental physical constraint (e.g. penetration, resolution, and signal to-noise ratio) [1][2].Geophysical method used the physics concept to characterize the subsurface profile. Common, physics properties used including resistivity, wave, density, magnetic susceptibility, etc.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Unknown Tube Well Depth Using Electrical Resistivity Method

et al. 2017

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Abstract. Electrical resistivity method has increasingly adopted in engineering, environmental, mining and archaeological studies. Systematic and proper studies of unknown civil engineering structure evaluation particularly on tube well depth was rarely being established. Conventionally, camera test or string with weight approach has been used to evaluate unknown tube well depth thus exposed to several restriction due to its expensive and time consuming. Hence, this study focused on evaluation of unknown tube well depth using indirect test with particular reference to electrical resistivity method (ERM).A single spread line of electrical resistivity survey was performed using ABEM SAS 4000 equipment set based on Wenner and Pole-dipole array in line with the tube well position. Electrical resistivity raw data was processed using RES2DINV software producing electrical resistivity tomography (ERT) of the subsurface profile studied. Then, electrical resistivity value (ERV) obtained from RES2DINV analyses (ERT) was extracted and analysed using plotted graph (depth versus ERV) specifically at tube well position based on electrical resistivity spread line performed. It was found that both array have shown some good similarity results in term of tube well depth (20 m) thus able to verify the result interpreted. Both array have shown some good similarity of ERV representing groundwater (ERV = 10 -100 Ωm) and soil with water (ERV > 100 Ωm) at depth of 0 -20 m and >20 m respectively. All those interpretation have shown good agreement based on verification thru established ERV of earth materials references, geological map and nearest available boreholes data. Hence, this study has shown that the application of ERM was applicable in evaluation of unknown tube well depth which efficient in term of cost, time and environmental sustainable.

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“…However in certain cases (large scale project), this traditional drilling method experienced several difficulties and limitations related to low efficiency of the project cost, time and data coverage. Moreover, the information obtained was a localized single point data thus promoting to the increment of uncertainties degree of subsurface profile investigated thru interpolation between large borehole data (Godio et al 2006;Mauritsch et al 2000). As a result, the solutions to these challenges will require multidisciplinary research across the social and physical sciences and engineering (Fragaszy et al 2011).…”

Section: Introductionmentioning

confidence: 99%

The Influences of Basic Physical Properties of Clayey Silt and Silty Sand on Its Laboratory Electrical Resistivity Value in Loose and Dense Conditions

Abidin¹,

Saad²,

Wijeyesekera³

et al. 2017

JSM

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Non-destructive test which refers to electrical resistivity method is recently popular in engineering Ujian tak musnah yang merujuk kepada kaedah kerintangan elektrik semakin banyak digunakan dalam kajian kejuruteraan, alam sekitar, arkeologi dan perlombongan. Berdasarkan kajian terdahulu, interpretasi keputusan kerintangan elektrik sering diperdebatkan disebabkan kekurangan bukti kajian dalam perspektif kuantitatif. Kebiasaannya interpretasi keputusan kerintangan elektrik banyak bergantung kepada perspektif kualitatif justeru berkemungkinan besar berisiko tinggi untuk menghasilkan keputusan yang salah. Maka, kajian ini telah menjalankan uji kaji makmal kerintangan elektrik tanah disokong oleh uji kaji sifat asas fizikal tanah seperti uji kaji taburan saiz zarah (d), kandungan lembapan (w), ketumpatan (ρ bulk ) dan had Atterberg (LL, PL dan PI). Uji kaji dijalankan untuk menghasilkan satu siri nilai kerintangan elektrik (ERV) berdasarkan kuantiti air yang berbeza terhadap lempung berkelodak dan kelodak berpasir dalam keadaan longgar dan juga mampat. Hasil keputusan menunjukkan nilai kerintangan tanah adalah berbeza dalam keadaan longgar (L) dan mampat (C) serta variasi kandungan air dan juga ketumpatan (pasir berkelodak = ERV = 638.8ρ -0.418 , w (D) = 1397.1ρ -0.574

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Geophysical investigations of large landslides in the Carnic Region of southern Austria

Cited by 92 publications

References 7 publications

Geophysical and Geotechnical Investigations of a Landslide in Kekem Area, Western Cameroon

Geophysical and Geotechnical Investigations of a Landslide in Kekem Area, Western Cameroon

Evaluation of Unknown Tube Well Depth Using Electrical Resistivity Method

The Influences of Basic Physical Properties of Clayey Silt and Silty Sand on Its Laboratory Electrical Resistivity Value in Loose and Dense Conditions

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