Investigation of a slope endangered by rainfall-induced landslides using 3D resistivity tomography and geotechnical testing

Friedel, S.; Thielen, A.; Springman, Sarah M.

doi:10.1016/j.jappgeo.2006.01.001

Cited by 135 publications

(76 citation statements)

References 15 publications

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“…Intense rainfall and rapid infiltration is widely accepted as one of the principal landslide triggers as slope materials tend to reduce in shear strength as they reach saturation (Friedel et al, 2006;Cruden & Varnes, 1996;Bell., 2007;Dijkstra and Dixon, 2010;Dijkstra et al, 2014), with a major contributing factor in clay slope instability being the reduction in pore suction associated with elevated moisture content (Toll et al, 2011;Lourenco et al, 2009). …”

mentioning

confidence: 99%

Measurement and modelling of moisture—electrical resistivity relationship of fine-grained unsaturated soils and electrical anisotropy

Merritt

Chambers

Wilkinson

et al. 2016

Journal of Applied Geophysics

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A methodology for developing resistivity-moisture content relationships of materials associated with a clayey landslide is presented. Key elements of the methodology include sample selection and preparation, laboratory measurement of resistivity with changing moisture content, and the derivation of models describing the relationship between resistivity and moisture content.Laboratory resistivity measurements show that the techniques utilised (samples and square array) have considerable potential as a means of electropetrophysical calibration of engineering soils and weak rock.Experimental electrical resistivity results show a hierarchy of values dependent on sample lithology, with silty clay exhibiting the lowest resistivities, followed by siltstones and sands, which return the highest resistivities. In addition, finer grained samples show a greater degree of anisotropy between measurement orientations than coarser grained samples.However, suitability of results in light of issues such as sample cracking and electrical conduction must be identified and accounted for if the results are to be accurately up-scaled to inverted model resistivity results.The existence of directional anisotropy makes model calibration curve selection more difficult due to variability in the range of measured laboratory resistances.The use of larger measurement array size means that experimental data will be more representative of bulk lithological properties. In addition, use of electrodes with a relatively high surface area (wide diameter) help maintain low contact resistances and repeat measurement error, relative to narrow electrodes.Variation exists between the fit of experimental data and petrophysical models. Model fit is best for claydominated samples but fits less well for sand-dominated samples. Waxman-Smits equation is appropriately applied in this investigation as all samples have considerable clay mineral content, as is shown in nonnegligible CEC results. The incorporation of pressure plate suction measurements on samples, allows suction dissipation to be quantified and evaluated alongside moisture content and electrical resistivity.

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mentioning

confidence: 99%

Measurement and modelling of moisture—electrical resistivity relationship of fine-grained unsaturated soils and electrical anisotropy

Merritt

Chambers

Wilkinson

et al. 2016

Journal of Applied Geophysics

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“…Furthermore, the decrement of ERV was resulted from an increment of metal ions or inorganic elements in geomaterials (Jung & Ha 2000). According to Friedel et al (2006), soil parameters determined in grain size analysis could replicate the variety of resistivity obtained on the site very well. Hence, this study is able to explain and predict various values of ERV due to the variation of selected soil physical state.…”

Section: Electrical Resistivity Value (Erv)mentioning

confidence: 87%

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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“…Diversos autores (FRIEDEL et al, 2006;AMATO et al, 2009;BECEGATO et al, 2009;SÉGER et al, 2009;SUDHA et al, 2009;HADZICK et al, 2011;USTRA et al, 2012) utilizam a tomografia elé-trica em diferentes estudos, por se tratar de um método rápido, não invasivo e com respostas confiáveis. DOI: 10.1590 Passivos ambientais -como os lixões, os cemitérios horizontais e a contaminação por hidrocarbonetos em solos e lençol freático -podem ser estudados e monitorados com a utilização de métodos geofísicos, entre os quais a tomografia elétrica (ATEKWANA et al, 2000;BERNSTONE et al, 2000;DE LA VEGA et al, 2003;BRAGA & CARDINALI, 2005;MENEZES et al, 2011;BERTOLLA et al, 2014).…”

Section: Introductionunclassified

Tomografia elétrica 2D e gravimetria para detecção de sítio contaminado por derivados de petróleo em área de passivo ambiental

Becegato

Ferreira

Stevanato

et al. 2016

Eng. Sanit. Ambient.

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Investigation of a slope endangered by rainfall-induced landslides using 3D resistivity tomography and geotechnical testing

Cited by 135 publications

References 15 publications

Measurement and modelling of moisture—electrical resistivity relationship of fine-grained unsaturated soils and electrical anisotropy

Measurement and modelling of moisture—electrical resistivity relationship of fine-grained unsaturated soils and electrical anisotropy

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

Tomografia elétrica 2D e gravimetria para detecção de sítio contaminado por derivados de petróleo em área de passivo ambiental

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