Determination of slope failure using 2-D resistivity method

Muztaza, Nordiana Mohd; Saad, Rosli; Ismail, Nur Azwin; Bery, Andy Anderson

doi:10.1063/1.4990894

Cited by 1 publication

(4 citation statements)

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“…According to Muztaza et al. (2018), boulders and floaters, which sit conformable on the saturated zones, may collapse during prolonged heavy rainfall due to changes in soil saturation and ground shaking from few magnitudes of earthquakes, resulting in slope instability that can initiate movement of materials downslope. Porres‐Benito et al.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have shown that the subsidence was caused by the loss of water in the saturated zone due to differential settlement of the boulders and floater weights resting conformable on the saturated zone, which creates instability within the residual soil (Hashemi, 2013). According to Muztaza et al (2018), boulders and floaters, which sit conformable on the saturated zones, may collapse during prolonged heavy rainfall due to changes in soil saturation and ground shaking from few magnitudes of earthquakes, resulting in slope instability that can initiate movement of materials downslope. Porres-Benito et al ( 2016) also discussed fractures' location by ERT as the high resistivity contrasts suggesting that ERT model results in Figures 4 and 5 were highly fractured/faulted terrain.…”

Section: Ert Model Interpretationmentioning

confidence: 99%

“…Also, subsurface imaging of the soil water distribution will help to provide valuable information about the landslide body, orientation, and depth (Hen‐Jones et al., 2017; Hojat et al., 2019; Pasierb et al., 2019). Previously published works available on slope instabilities have shown that landslides were triggered by heavy rainfall due to the presence of clay (Azman, 2018; Jamalludin et al., 2014; Muztaza et al., 2018; Pasierb et al., 2019). However, research work on changes in soil saturation in gravelly sand soil within the unsaturated zone of the residual soil for slope instability monitoring is rare.…”

Section: Introductionmentioning

confidence: 99%

“…Electrical Resistivity Tomography has been proven useful in subsurface imaging of soil to monitor moisture of embarkments; delineate landslide body, geometry, slip surfaces and depth; and map unstable areas of instabilities in the slope (Muztaza et al., 2018; Olabode et al., 2020; Pasierb et al., 2019; Rezaei et al., 2019). Electrical Resistivity Tomography has the advantages of noninvasive and nondestructive nature of probing the subsurface and it is relatively cheap with rapid results that are compatible with subsurface earth materials, waste pollutant, and anthropogenic materials (Lech et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

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Geophysical and Geotechnical Evaluation of Landslide Slip Surface in a Residual Soil for Monitoring of Slope Instability

Olabode

San

Ramli

2022

Earth and Space Science

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Electrical Resistivity Tomography (ERT) technique has been widely used conventionally to monitor slope instability; however, a detailed study to validate ERT models with geotechnical properties for monitoring of slope instability is still rare. The objective of this work was to evaluate soil water conditions in gravelly sand soil that influences slope instability. The ERT investigation was conducted on a 60 m survey length with 1.5 m electrodes space to obtain subsurface geological structures and geotechnical laboratory tests, and experiments were carried out to obtain soil engineering properties for validation of the ERT model results. Our results revealed three geological zones namely: saturated, weathered granite, boulders and floaters, and resistivity values of 1–800 Ωm, 1,200–4,000 Ωm, and >4,000 Ωm, respectively. The saturated zones were characterized by subsidence during dry season and possible collapsed structures of boulders and floaters during prolonged heavy rainfall. The analyzed ERT models revealed that the slip surface of a potential landslide may occur at the boundary between the saturated and weathered granite zones within 3.0 m depth. The analyzed geotechnical properties also confirmed the ERT result because the potential landslide sliding surface was delineated within 3.0 m depth at the boundary between gravelly sand with a lowest angle of internal friction of 30° and a cohesion of 8 KPa, which was easier to destroy, and silty sand with a high angle of internal friction of 33.8° and a cohesion of 12.7 KPa, which was more difficult to destroy. These findings are very fundamental in shaping the earth's surface, especially in the formation of landscapes.

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Section: Discussionmentioning

confidence: 99%

Section: Ert Model Interpretationmentioning

confidence: 99%