Safety Factor Characterization of Landslide in Riau-West of Sumatra Highway

Cahyaningsih, Catur

doi:10.21660/2019.63.69945

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…Table 6 shows that the soil on Bodor River slope has a low friction angle between 1.38 to 14.11, indicating that the soil is prone to landslides. This follows previous research in Table 7, which states that soil with a friction angle between 11° and 25° has a very loose density, so it is at risk of landslides [39]. Increasing soil water content can cause the friction angle and cohesion values to decrease significantly, indicating that the slope is unstable [14] [40].…”

Section: Friction Angle Cohesion and Landslidesupporting

confidence: 88%

Investigation and Slope Improvement of Landslides on Bodor River Slopes

Mumayyizah,

Candra,

Iskindaria

et al. 2023

U Karst

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The Bodor River is an important source of rice irrigation because most of the population works in the agricultural sector. The slopes of the Bodor River have experienced landslides, causing a major negative impact on the community. Many studies state that soil type, consistency, and friction angle influence slope failure. However, the relationship between soil characteristics and landslides on slopes, especially on the Bodor River, has not been studied. This research aims to identify soil characteristics and their influence on landslides on the slopes of the Bodor River, along with recommendations for improvement. The soil was taken after a landslide occurred at a depth of 80 cm for a sieve gradation test, Atterberg limit test, direct shear test, and slope stability analysis using the Cullman method. The research results show that the SW-SM soil type on the slopes of the Bodor River is highly vulnerable to landslides. A steep slope of 50° and a low soil friction angle between 1.38 and 14.11 have less than one safety factor. Changes in soil conditions, such as increased water content, contribute to a higher risk of landslides. Therefore, strengthening the slope is necessary, with the recommendation to increase the slope to 34.5° so that the slope safety factor increases by 73%. The results of this research provide an overview of the relationship between geotechnical soil parameters that influence slope failure in river areas and recommendations for slope improvement to prevent future collapse.

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Section: Friction Angle Cohesion and Landslidesupporting

confidence: 88%

Investigation and Slope Improvement of Landslides on Bodor River Slopes

Mumayyizah,

Candra,

Iskindaria

et al. 2023

U Karst

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“…A factor of safety (FS) larger than 1 theoretically represents a stable slope. For landslides, values between 0.7 and 1.25 are considered a critical slope, and over 1.25 refers to a stable slope [18].…”

Section: Factor Of Safety (Fs) =mentioning

confidence: 99%

“…The factor of safety (FS) has been used by many authors to describe landslide stability conditions and is basically the ratio between the resisting forces of a soil mass tending to slide down and its driving forces. There are numerous approaches for the factor of safety estimation, including limit equilibrium methods, which work on quantitatively identifying the slope stability based on momentum and forces analysis [18][19][20]. This paper's major scope is to improve a three-dimensional geological model of a well-known landslide in the Spanish Pyrenees (Vallcebre landslide).…”

Section: Introductionmentioning

confidence: 99%

Application of Resistivity and Seismic Refraction Tomography for Landslide Stability Assessment in Vallcebre, Spanish Pyrenees

et al. 2022

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Geophysical surveys are a noninvasive reliable tool to improve geological models without requiring extensive in situ borehole campaigns. The usage of seismic refraction tomography (SRT), electrical resistivity tomography (ERT) and borehole data for calibrating is very appropriate to define landslide body geometries; however, it is still only used occasionally. We present here the case of a Spanish Pyrenees slow-moving landslide, where ERT, SRT and lithological log data were integrated to obtain a geological three-dimensional model. The high contrasts of P-wave velocity and electrical resistivity values of the upper materials (colluvial debris and clayey siltstone) provided accurate information on the geometry of the materials involved in the landslide body, as well as the sliding surface. Geophysical prospecting allowed us to identify the critical sliding surface over a large area and at a reduced cost and, therefore, gives the geophysical method an advantage over borehole data. The three-dimensional model was used to carry out stability analyses of a landslide in 2D and 3D, which, coherently with previous studies, reveal that the lower part is more unstable than the upper units.

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“…And in cases such as this, where the flow water is salinized, this allows discrimination at the top of the basal layer [19]. However, this method is used less in landslide studies [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Using Electrical Resistivity Tomography Method to Determine the Inner 3D Geometry and the Main Runoff Directions of the Large Active Landslide of Pie de Cuesta in the Vítor Valley (Peru)

Huayllazo,

Infa,

Soto

et al. 2023

Geosciences

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Pie de Cuesta is a large landslide with a planar area of 1 km2 located in the Vítor district, in the Arequipa department (Peru), and constitutes an active phenomenon. It belongs to the rotational/translational type, which concerns cases that are very susceptible to reactivation because any change in the water content or removal of the lower part can lead to a new instability. In this context, a previous geological study has been decisive in recognizing the lithologies present and understanding their behavior when they are saturated. But it is also necessary to know the inner “landslide geometry” in order to gusset a geotechnical diagnosis. The present study shows how the deep electrical profiles (ERT, electrical resistivity tomography method), supported by two Vp seismic refraction tomography lines (SVP), have been used to create a 3D cognitive model that would allow the identification of the inner landslide structure: the 3D rupture surface, the volume of the sliding mass infiltration sectors or fractures, and the preferred runoff directions. Moreover, on large landsides, placing the geophysical profiles is a crucial aspect because it greatly depends on the accessibility of the area and the availability of the physical space required. In our case, we need to extend profiles up to 1100 m long in order to obtain data at greater depths since this landslide is approximately 200 m tall. Based on the geophysical results and geologic information, the 3D final model of the inner structure of this landslide is presented. Additionally, the main runoff water directions and the volume of 90.5 Hm3 of the sliding mass are also estimated.

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Safety Factor Characterization of Landslide in Riau-West of Sumatra Highway

Cited by 5 publications

References 14 publications

Investigation and Slope Improvement of Landslides on Bodor River Slopes

Investigation and Slope Improvement of Landslides on Bodor River Slopes

Application of Resistivity and Seismic Refraction Tomography for Landslide Stability Assessment in Vallcebre, Spanish Pyrenees

Using Electrical Resistivity Tomography Method to Determine the Inner 3D Geometry and the Main Runoff Directions of the Large Active Landslide of Pie de Cuesta in the Vítor Valley (Peru)

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