Combined Analysis of Electrical Resistivity and Geotechnical SPT Blow Counts for the Safety Assessment of Fill Dam

Oh, Se‐Young; Suh, Baek-Soo; Lee, H.

doi:10.3997/2214-4609.201401811

Cited by 13 publications

(14 citation statements)

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“…In the fully saturated case, the water level may be approximately delineated with an inverted result, showing a drastic change in the resistivity pattern around a depth of 10-15 m (similar to the true value at 10 m). In accordance with previous electrical surveys of embankments (Oh and Sun 2008), the saturated cases seem to be more realistic and show low resistivity values around the lower portions of a resistivity section. However, it is very difficult to predict the resistivity values of the upstream materials.…”

Section: Effects Of Reservoir Statussupporting

confidence: 87%

Electrical resistivity response due to variation in embankment shape and reservoir levels

2011

Environ Earth Sci

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The safety of the center-core type of fill dam structure was assessed by examining the effects of the distortion of electrical response verified in terms of twodimensional (2D) apparent resistivity and its inverted sections from three-dimensional (3D) modeling for the embankment. The distortion effect is due to 2D interpretation of the 3D structure of the embankment. From the analysis, it was found that water level was correctly described by the resistivity section around the middle part rather than each side at the end of the embankment. This is due to the 3D terrain effect when the material of the embankment is assumed to be horizontally uniform. In addition, when the slope of the outer rock-fill section is set as uniform, the resistivity section is more similar for sharper center-core slopes. On the other hand, when the rock-fill slope is steep, the resistivity section shows the water level at a lower position than the real one, and the 3D distortion effect at the end of the embankment is enhanced.

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Section: Effects Of Reservoir Statussupporting

confidence: 87%

Electrical resistivity response due to variation in embankment shape and reservoir levels

2011

Environ Earth Sci

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“…If there is any weak zone in the core of the embankment material as a result of piping or internal erosion, such zones will have a higher resistivity [23]. The resistivity variation within an embankment can be compared with the values reported here, and thus this study can help to address any safety concern in the embankment.…”

Section: Correction To Experimental Valuesmentioning

confidence: 86%

Electrical resistivity of iron ore mine tailings produced in Western Australia

Kuranchie

Shukla

Habibi

2014

International Journal of Mining, Reclamation and Environment

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This paper presents the details of an experimental study on the electrical resistivity of iron ore mine tailings produced in Western Australia. In the study, an experimental set-up is developed based on the Wenner Array, and has been used for determining the electrical resistivity of the tailings at different relative densities in dry and fully saturated conditions. The apparent electrical resistivity of the iron ore mine tailings ranged from 11 kΩm for a very dense state to 19 kΩm for a very loose state in dry condition; while for the fully saturated condition, the resistivity ranged from 20 to 31 Ωm for very dense state to very loose state, respectively. The results are discussed for their practical applications such as identifying weak zones in tailing embankments, extent of corrosion in buried steel pipelines, and extent of degree of compaction in structural fills

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“…Therefore, this study used only V S determined by crosshole and downhole tests of the weathered layer in Hongseong to determine the correlations between V S and N values. For blow counts above 50 (e.g., 50/25 or 50/6) in the layers of weathered soil and weathered rock, N values were extrapolated linearly to a penetration depth of 30 cm to analyze the regression between V S and N values (Oh and Sun 2008;Sun et al 2013). The absolute meaning of N values measured in the field may differ between tests owing to differences such as the type of hammer, the method of using the hammer, borehole diameter, ground conditions, rod length, difference in working capability, and effective overburden pressure (Aggour and Radding 2001).…”

Section: Relationship Between Shear Wave Velocity and N Value In The mentioning

confidence: 99%

Geotechnical comparison of weathering degree and shear wave velocity in the decomposed granite layer in Hongseong, South Korea

et al. 2015

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As part of a fundamental characterization of a subsurface layer in South Korea, the weathering degree and shear wave velocity (V S ) were evaluated in a decomposed granite in Hongseong, using X-ray fluorescence analyses and site investigations, including borehole drilling with standard penetration test (SPT) and in situ seismic tests. The subsurface layer was composed of a weathered layer 10-40 m thick at most sites. Weathering degree analyses indicated that three chemical weathering indices, the modified weathering potential index (MWPI), Vogt ratio (VR), and weathering index of Parker (WIP), generally increased with decreasing depth. In situ seismic tests revealed that V S ranged between 200 and 500 m/s in the weathered layer. Using the V S and N values from the SPT at borehole seismic testing sites, correlations between V S and N values were established for the weathered layer. Furthermore, examination of the relationships of the V S and N values with the MWPI, WIP, and 100/VR indices showed that the index values increased linearly with increasing V S and exponentially with increasing N values.

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Combined Analysis of Electrical Resistivity and Geotechnical SPT Blow Counts for the Safety Assessment of Fill Dam

Cited by 13 publications

References 0 publications

Electrical resistivity response due to variation in embankment shape and reservoir levels

Electrical resistivity response due to variation in embankment shape and reservoir levels

Electrical resistivity of iron ore mine tailings produced in Western Australia

Geotechnical comparison of weathering degree and shear wave velocity in the decomposed granite layer in Hongseong, South Korea

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