Electrical Resistivity Based Non-Destructive Testing Method for Determination of Soil’s Strength Properties

Precise determination of engineering properties of soil is essential for proper design and successful construction of any structure. The conventional methods for determination of engineering properties are invasive, costly and time-consuming. Electrical resistivity survey is an attractive tool for delineating subsurface properties without soil disturbance. Reliable correlations between electrical resistivity and other soil properties will enable us to characterize the subsurface soil without borehole sampling. This paper presents the preliminary results of an ongoing research on correlations of electrical resistivity with strength properties of soil. Soil investigations, field electrical resistivity survey (VES) and laboratory electrical resistivity measurements were conducted. From the data analysis, significant correlations have been obtained between resistivity and moisture content and angle of internal friction. Weaker correlations have been observed for cohesion and unit weight of soil.

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Determination of Leak Zone of Reservoir Embankment by Electrical Resistivity Survey and Drilling Survey

Journal of the Korean Society for Environmental Technology ◽

10.26511/jkset.20.3.9 ◽

2019 ◽

Vol 20 (3) ◽

pp. 204-212

Author(s):

Woong-Won Jeong ◽

Min-Hwan Kim

Keyword(s):

Electrical Resistivity ◽

Electrical Resistivity Survey ◽

Resistivity Survey

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APPLICATION OF ELECTRICAL RESISTIVITY TOMOGRAPHY (ERT) FOR SLOPE FAILURE INVESTIGATION: A CASE STUDY FROM KUALA LUMPUR

Jurnal Teknologi ◽

10.11113/jt.v80.11624 ◽

2018 ◽

Vol 80 (5) ◽

Author(s):

Nurul Iffah Ismail ◽

Wan Zuhairi Wan Yaacob

Keyword(s):

Electrical Resistivity ◽

Electrical Resistivity Tomography ◽

Slope Failure ◽

Engineering Properties ◽

Kuala Lumpur ◽

Resistivity Tomography ◽

Electrical Resistivity Survey ◽

Resistivity Survey ◽

Soil Hardness ◽

Geophysical Surveys

Electrical Resistivity Tomography (ERT) is a commonly used tool in near surface geophysical surveys to investigate numerous geological, environmental, and engineering problems including landslides. In this study, an electrical resistivity survey was conducted at a landslide area, located in Bukit Setiawangsa, Kuala Lumpur, Malaysia. On 29th December 2012, a luxury hilltop bungalow was split into two when a 43m retaining wall was collapsed after a continuous heavy downpour. 2-D electrical resistivity survey have been acquired along two (2) profiles on the adjacent slope in an effort to mitigate the risks of instability, especially during the rectification work of the failed slope using a Schlumberger Array. It produced useful information about the geometry and characteristics of the study area. In addition, the 2-D resistivity method was performed to determine the behaviour of electrical resistivity underlying the slope areas and estimate the location of the failure surface. Four (4) boreholes were also drilled to obtain engineering properties of the study area such as soil classification, moisture content, soil hardness and SPT N-value. In order to develop the relationship between resistivity and engineering properties, a comparison between soil hardness and the resistivity value was made. Results from the ERT indicated the presence of zones with low resistivity values identified as percolated water in permeable loose soil, which was believed to be the potential slip surface. The findings of this study also showed that the electrical resistivity imaging coupled with borehole drillings were useful tools for the characterisation of slope failure via subsurface profiles and engineering properties of soil.

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Geological and engineering analysis of residual soil for forewarning landslide from highland area in northern Thailand

Open Geosciences ◽

10.1515/geo-2015-0059 ◽

2015 ◽

Vol 7 (1) ◽

Cited By ~ 1

Author(s):

Thanakrit Thongkhao ◽

Sumet Phantuwongraj ◽

Montri Choowong ◽

Thanop Thitimakorn ◽

Punya Charusiri

Keyword(s):

Electrical Resistivity ◽

Shear Strength ◽

Moisture Content ◽

Engineering Properties ◽

Main Stream ◽

Residual Soil ◽

Northern Thailand ◽

Electrical Resistivity Survey ◽

Resistivity Survey ◽

Landslide Event

AbstractOne devastating landslide event in northern Thailand occurred in 2006 at Ban Nong Pla village, Chiang Klang highland of Nan province after, a massive amount of residual soil moved from upstream to downstream, via creek tributaries, into a main stream after five days of unusual heavy rainfall. In this paper, the geological and engineering properties of residual soil derived fromsedimentary rocks were analyzed and integrated. Geological mapping, electrical resistivity survey and test pits were carried out along three transect lines together with systematic collection of undisturbed and disturbed residual soil samples. As a result, the average moisture content in soil is 24.83% with average specific gravity of 2.68,whereas the liquid limit is 44.93%, plastic limit is 29.35% and plastic index is 15.58%. The cohesion of soil ranges between 0.096– 1.196 ksc and the angle of internal friction is between 11.51 and 35.78 degrees. This suggests that the toughness properties of soil change when moisture content increases. Results from electrical resistivity survey reveal that soil thicknesses above the bedrock along three transects range from 2 to 9 m. The soil shear strength reach the rate of high decreases in the range of 72 to 95.6% for residual soil from shale, siltstone and sandstone, respectively. Strength of soil decreaseswhen the moisture content in soil increases. Shear strength also decreases when the moisture content changes. Therefore, the natural soil slope in the study area will be stable when the moisture content in soil level is equal to one, but when the moisture content between soil particle increases, strength of soil will decrease resulting in soil strength decreasing.

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