A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Mechanical Effect of Vetiver Grass Root for Stabilization of Natural and Terraced Hill Slope
https://orcid.org/0000-0001-9620-2413
Abstract This paper studies the role of vetiver grass (Vetiveria zizanoides) on the stability of hill slopes through physical and numerical modeling. Vetiver plantation in nutrient-deficient poorly graded sand with silt in a glass model, showing mean root growth of 0.42 m and increase in tillers (shoots) from 3 to 15 after six months, advocates its survival in unfavorable soil conditions. Finite element analysis shows, for the sand/silt, existing 15 m high bare natural slopes are stable up to a slope angle of 30° with a factor of safety of 1.01 and crest deformation of 37.2 mm. Covering the whole slope with vetiver yields a higher factor of safety of 1.17 and nearly 10 mm lower crest deformation as the root zone depth reaches 3.0 m. However, as this positive impact of root’s mechanical reinforcement is inhibited beyond the threshold angle of 33.3° yielding factor of safety of 1.06, terraced slopes in combination with vetiver are considered. Compared to sand/silt, vetiver performs better in sandy silt in reducing chances of shallow slope failure at the same geometry of natural slope. This study recommends vetiver as a sustainable and cost-effective approach for restoration of hill slopes along with reducing the risk of shallow slope failures and eventually landslides.
Mechanical Effect of Vetiver Grass Root for Stabilization of Natural and Terraced Hill Slope
https://orcid.org/0000-0001-9620-2413
Abstract This paper studies the role of vetiver grass (Vetiveria zizanoides) on the stability of hill slopes through physical and numerical modeling. Vetiver plantation in nutrient-deficient poorly graded sand with silt in a glass model, showing mean root growth of 0.42 m and increase in tillers (shoots) from 3 to 15 after six months, advocates its survival in unfavorable soil conditions. Finite element analysis shows, for the sand/silt, existing 15 m high bare natural slopes are stable up to a slope angle of 30° with a factor of safety of 1.01 and crest deformation of 37.2 mm. Covering the whole slope with vetiver yields a higher factor of safety of 1.17 and nearly 10 mm lower crest deformation as the root zone depth reaches 3.0 m. However, as this positive impact of root’s mechanical reinforcement is inhibited beyond the threshold angle of 33.3° yielding factor of safety of 1.06, terraced slopes in combination with vetiver are considered. Compared to sand/silt, vetiver performs better in sandy silt in reducing chances of shallow slope failure at the same geometry of natural slope. This study recommends vetiver as a sustainable and cost-effective approach for restoration of hill slopes along with reducing the risk of shallow slope failures and eventually landslides.
Mechanical Effect of Vetiver Grass Root for Stabilization of Natural and Terraced Hill Slope
https://orcid.org/0000-0001-9620-2413
Abstract This paper studies the role of vetiver grass (Vetiveria zizanoides) on the stability of hill slopes through physical and numerical modeling. Vetiver plantation in nutrient-deficient poorly graded sand with silt in a glass model, showing mean root growth of 0.42 m and increase in tillers (shoots) from 3 to 15 after six months, advocates its survival in unfavorable soil conditions. Finite element analysis shows, for the sand/silt, existing 15 m high bare natural slopes are stable up to a slope angle of 30° with a factor of safety of 1.01 and crest deformation of 37.2 mm. Covering the whole slope with vetiver yields a higher factor of safety of 1.17 and nearly 10 mm lower crest deformation as the root zone depth reaches 3.0 m. However, as this positive impact of root’s mechanical reinforcement is inhibited beyond the threshold angle of 33.3° yielding factor of safety of 1.06, terraced slopes in combination with vetiver are considered. Compared to sand/silt, vetiver performs better in sandy silt in reducing chances of shallow slope failure at the same geometry of natural slope. This study recommends vetiver as a sustainable and cost-effective approach for restoration of hill slopes along with reducing the risk of shallow slope failures and eventually landslides.
Mechanical Effect of Vetiver Grass Root for Stabilization of Natural and Terraced Hill Slope
Aziz, Shamontee (author) / Islam, Mohammad Shariful (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
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