Combined geophysical and geotechnical approach to ground investigations and hazard zonation of a quick clay area, mid Norway

Solberg, Inger-Lise; Hansen, L.F.; Rønning, Jan Steinar; Haugen, Ellen D.; Dalsegg, Einar; Tønnesen, Jan Fredrik

doi:10.1007/s10064-011-0363-x

Cited by 72 publications

(48 citation statements)

References 10 publications

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“…The method is a cost effective and valuable complement to drilling as it can separate intact marine clay deposits (high salt content / low resistivity) from quick clay (low salt content / higher resistivity), in addition to identifying coarser material and bedrock. Typical resistivity values for various materials are summarised on Table 2, which is modified from Solberg et al (2012) …”

Section: Electrical Resistivity Tomography (Ert) Backgroundmentioning

confidence: 99%

“…In a study of synthetic data to represent marine clays, Reiser et al (2010) showed that "smooth" inversion with a vertical / horizontal filter of 0.5 resulted in the most accurate inversion models. "Smooth" inversion was generally used as standard (Solberg, Hansen et al 2012) but it was found that "robust" inversion can give better definition of sharp boundaries, e.g. between clay and bedrock (Reiser, Dahlin et al 2010).…”

Section: Data Processingmentioning

confidence: 99%

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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: Electrical Resistivity Tomography (Ert) Backgroundmentioning

confidence: 99%

Section: Data Processingmentioning

confidence: 99%

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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“…In addition, we have varied the resistivity contrast, the soil-cover thickness (0, 5, 10, 20 and 40 m), and composition. Soil-cover resistivity of 500 X m represents coarse-grained sediments (sand/gravel or moraine); 100 X m represents fine-grained sediments, water-saturated sand or silt; 50 X m represents leached sediments (e.g., quick clay), and 10 X-m represents unbleached-salt marine clay (Solberg et al 2008(Solberg et al , 2011.…”

Section: Resistivity Modellingmentioning

confidence: 99%

Resistivity mapping as a tool for identification and characterisation of weakness zones in crystalline bedrock: definition and testing of an interpretational model

Rønning

Ganerød

Dalsegg

et al. 2013

Bull Eng Geol Environ

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In recent years, the focus on feasibility studies for tunnels has increased in Norway. Traditionally, the refraction seismic method and the very low-frequency electromagnetic method (VLF-EM) have been used. The Geological Survey of Norway introduced the electrical resistivity traversing method (ERT) in feasibility studies for tunnel construction purposes. Resistivity modelling shows that the method has the potential to characterise fracture zones geometrically; i.e., the thickness, dip, and depth extent. Based on previous studies, a model for mineralogical characterisation is proposed. This model, and the possibility for geometrical characterisation, is critically tested with success on three tunnel projects. The results of the comparison study, with regards to weakness zones, show that VLF-EM is a method that is capable of locating fracture zones, while refraction seismic is capable of locating and indicating the width of the zone, and can be used to imply the thickness of the soil cover above bedrock. The 2D resistivity method is able to locate the weakness zone, indicate the width, depth extent, and the dip of the zone, and in addition, characterise the zone with respect to stability or water problems. The crystalline bedrock characterisation is divided into three groups: resistivity values above 3,000 X m indicating good rock quality, values between 3,000 and 500 X m indicating bedrock with mainly water problems, while values \500 X m indicate clay-bearing, unstable rock with fewer water problems. From our investigations, we conclude that the 2D resistivity method is a very good supplement to traditional methods for feasibility studies on tunnelling purposes in crystalline rock.

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“…For example, the properties of ERV can be found to be dissimilar even for the same particular type of geomaterials in many past references. Moreover, conventional reference tables of geomaterials used for anomaly interpretation were sometimes difficult to decipher due to wide range of variation and overlapping values (Solberg et al 2011). As a result, strong result verification is important to clarify its behaviour which was conventionally concluded according to the qualitative approach which was relative to the individual experience and expert .…”

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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Combined geophysical and geotechnical approach to ground investigations and hazard zonation of a quick clay area, mid Norway

Cited by 72 publications

References 10 publications

Relationship between electrical resistivity and basic geotechnical parameters for marine clays

Relationship between electrical resistivity and basic geotechnical parameters for marine clays

Resistivity mapping as a tool for identification and characterisation of weakness zones in crystalline bedrock: definition and testing of an interpretational model

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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