Liquefaction, landslide and slope stability analyses of soils: a case study of 
soils from part of Kwara, Kogi and Anambra states of Nigeria

Ige, Olusegun Omoniyi; Oyeleke, Tolulope A.; Baiyegunhi, Christopher; Oloniniyi, Temitope L.; Sigabi, L.

doi:10.5194/nhess-2016-297

Cited by 13 publications

(26 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The result implies that root matric has significant effect on cohesion and this effect varies with the depth depending on root length density. It has been reported that soil strength increases with depth due to the increase in interaction between root and soil particles [30,40,67,68]. In the present study, plants roots has greatest effect at shallow depth of slope than deeper, where the root length density is generally the highest.…”

Section: Influence Of Root Penetration Depth On Factor Of Safetysupporting

confidence: 46%

“…The safety factor of the vegetated slope increases with decreasing vegetation spacing. Plants vegetated on entire slope surface with smaller vegetation spacing increase root density and enhanced interlink of thin roots for soil reinforcement as depicted by [2,12,33,40,69]. The result from the analysis shows that as the spacing of vegetation increases, enhancement of soil shear strength of the slope decrease and the slope is prone to failure.…”

Section: Effect Of Vegetation Spacing To Safety Factor Of Slopementioning

confidence: 98%

“…Additionally, vegetation can reduce soil moisture by means of transpiration, which increase the matrix suction of the soil, resulting in an increase in the soil shear strength [7,14,37]. In terms of mechanical aspects, vegetation increases the soil shear strength by transferring the shear stress developed in the soil to the roots fibers, through the tensile strength mobilized in the roots [39][40][41][42]. This study focused on the mechanical effect of plant roots on slope stabilization along mountainous transportation corridors by considering the effect of soil moisture variation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stability Analysis of Plant-Root-Reinforced Shallow Slopes along Mountainous Road Corridors Based on Numerical Modeling

2019

View full text Add to dashboard Cite

Engineering methods such as soil nails, geosynthetic reinforcement, retaining structures, gabions, and shotcrete are implemented to stabilize road cut slopes along mountainous areas. However, these structures are not environmentally friendly and, particularly in Ethiopia, it is impossible to address all road problems due to financial limitations. Nowadays, soil reinforcement with plant roots is recognized as an environmentally sustainable alternative to improve shallow slope failure along mountainous transportation corridors. The aims of this study was, therefore, to conduct slope stability analysis along a road corridor by incorporating the effect of plant roots. Five plant species were selected for the analysis based on their mechanical characteristics. Namely, Eucalyptus globules (tree), Psidium guajava (shrub), Salix subserrata (shrub), Chrysopogon zizanioides, and Pennisetum macrourum (grasses). The roots' tensile strength and soil parameters were determined through tensile strength testing and triaxial compression tests, respectively. The factor of safety of the slope was calculated by the PLAXIS-2D software. The study showed that when the slope was reinforced with plant roots, the factor of safety (FOS) improved from 22-34%. The decreasing effect of vegetation on slope stability was observed when soil moisture increased. The sensitivity analysis also indicated that: (1) as the spacing between plants decreased, the effect of vegetation on the slope increased. (2) Slope angle modification with a combination of plant roots had a significant impact on slope stabilization. Of the five-selected plant species, Salix subserrata was the promising plant species for slope stabilization as it exhibited better root mechanical properties among selected plant species.

show abstract

Section: Influence Of Root Penetration Depth On Factor Of Safetysupporting

confidence: 46%

Section: Effect Of Vegetation Spacing To Safety Factor Of Slopementioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability Analysis of Plant-Root-Reinforced Shallow Slopes along Mountainous Road Corridors Based on Numerical Modeling

2019

View full text Add to dashboard Cite

show abstract

“…Globally, natural disasters have become a great challenge to humans. These disasters ranged from the failures of embankments, natural slopes, earth structures and foundations; and they have been attributed to the liquefaction of sands, landslides and slope instability (Ige et al, 2016). However, these natural disasters are a result of seismic effects and only occur in a geographical area with distinct characteristics.…”

Section: Introductionmentioning

confidence: 99%

Seismic Waves Response Characteristics of Niger Delta Soils

Okovido

Kennedy

2021

Nig. J. Env. Sci. & Tech.

View full text Add to dashboard Cite

The study investigated the dynamic soil properties of States in Niger Delta region of Nigeria as a function of seismic activities. The down-hole seismic test was used to determine the response of the soils. The results of soil samples collected up to 30m depth, showed that the average young modulus increases with increase in depth, which ranged from 115.77±1.74 to 3231.17±1.01 kPa across the States. Also, shear wave velocity generally increases with increase in depth. The average shear wave velocity across the States ranged from 126.00±1.86 to 288.00±2.63m/s. Also, the average P-wave velocity increases with depth, with values across the States ranging from 310.60±3.51 to 656.00±3.69m/s. On the other hand, the void ratio was observed to be constant at certain range of depth, and in most with values across the States ranging from 0.651±.093 to 0.860±.067. Unlike void ratio, Poisson’s ratio fluctuates with depth, with values across the States ranging from 0.23±2.27 to 0.36±1.18. Based on the results, the Niger Delta region may be resistant to earthquake, but as an oil hub of Nigeria, it is also susceptible to earthquake that could be triggered by stress due to heavy load and seismic activities.

show abstract

“…This may cause huge decrease in the cohesion and angle of internal friction which can lead to slope instability [4]. A group of researchers added that the liquefaction rate for soil mainly composed of sand and silt are higher compared to that with clay [5]. The liquefaction is also greatly influenced by the low plasticity soil.…”

Section: Introductionmentioning

confidence: 99%

Engineering Properties of Debris Flow Material at Bundu Tuhan, Ranau, Sabah, Malaysia

Joe¹,

Tongkul²,

Roslee³

2018

Pak. j. geol.

View full text Add to dashboard Cite

Recurring events of debris flow especially during heavy rainfall have caused cutoff at one of the main road in Bundu Tuhan, Ranau namely Jalan Tamparuli-Ranau KM 83.90. In several incidents, the road was closed to public for hours due to deposition of thick sediment on the road, causing interruption to their daily activities. However, study on the properties of the debris flow material and their relationship with debris flow characteristics is quite limited. Thus, the objective of this study is to comprehend the debris flow trait based on the material property. The study of the material property pertains to the grain size distribution, Atterberg limit, and lastly the moisture content. They are interpreted based on the results in site investigation report where the soil samples were taken from nine numbers of trial pits which were excavated around the runout and deposition zones. This study found that the granular type debris flow displays high kinetic energy, shorter transportation distance towards deposition, large velocity, and more sediment flow towards deposition. Meanwhile, the low plasticity index of the soil causes a high occurrence of liquefaction process. Higher moisture content has also assisted in the mobilization of material.

show abstract

Liquefaction, landslide and slope stability analyses of soils: a case study of soils from part of Kwara, Kogi and Anambra states of Nigeria

Abstract: 11Landslide is one of the most ravaging natural disaster in the world and recent occurrences in Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2016Discuss., doi:10.5194/nhess- -297, 2016 Manuscript under review for journal Nat.

Cited by 13 publications

References 1 publication

Stability Analysis of Plant-Root-Reinforced Shallow Slopes along Mountainous Road Corridors Based on Numerical Modeling

Stability Analysis of Plant-Root-Reinforced Shallow Slopes along Mountainous Road Corridors Based on Numerical Modeling

Seismic Waves Response Characteristics of Niger Delta Soils

Engineering Properties of Debris Flow Material at Bundu Tuhan, Ranau, Sabah, Malaysia

Contact Info

Product

Resources

About