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Strength Reduction Method in the Stability Assessment of Vegetated Slopes Cover

Strength Reduction Method in the Stability Assessment of Vegetated Slopes

Architecture, Civil Engineering, Environment
Volume 16 (2023): Issue 2 (June 2023)
By:
Open Access
|Jul 2023

Figures & Tables

Figure 1.

Changes in peak strength with variable initial void ratio according to critical state soil mechanics, after Atkinson [19]. Top plot: effective stress versus shear stress, bottom plot: effective stress versus void ratio
Changes in peak strength with variable initial void ratio according to critical state soil mechanics, after Atkinson [19]. Top plot: effective stress versus shear stress, bottom plot: effective stress versus void ratio

Figure 2.

Geometry, finite element discretization and boundary conditions of the modelled vegetated slope
Geometry, finite element discretization and boundary conditions of the modelled vegetated slope

Figure 3.

Values of the factor of safety calculated for different durations of the rainfall application. Results obtained for the bare reference slope and the vegetated slope
Values of the factor of safety calculated for different durations of the rainfall application. Results obtained for the bare reference slope and the vegetated slope

Figure 4.

Contour of the square root of the second invariant of the deviator strain at the end of the strength reduction step for the rainfall duration of 45000 s (12.5 h) for the reference slope, presented on a deformed mesh
Contour of the square root of the second invariant of the deviator strain at the end of the strength reduction step for the rainfall duration of 45000 s (12.5 h) for the reference slope, presented on a deformed mesh

Figure 5.

Contour of the square root of the second invariant of the deviator strain at the end of the strength reduction step for the rainfall duration of 45000 s (12.5 h) for the reference vegetated slope, presented on a deformed mesh
Contour of the square root of the second invariant of the deviator strain at the end of the strength reduction step for the rainfall duration of 45000 s (12.5 h) for the reference vegetated slope, presented on a deformed mesh

Values of the factor of safety for different combinations of root parameters

Rp mrini {\boldsymbol {m}_{\boldsymbol {r}}^{\boldsymbol {ini}}} FOS
1.00.51.474
2.00.51.477
3.00.51.481
3.01.01.481
3.01.51.487
4.01.51.494

List of soil parameters

ParameterSymbolValueUnit
Dry unit weightγd12.95kN/m3
Poisson's ratioν0.3-
Plastic compressibilityλ0.145-
Elastic compressibilityκ0.0097-
Slope of the critical state lineM1.0-
Saturated permeabilityks5.00E-06m/s
Initial void ratioeo0.8-
Van Genuchten’ sparamters:
a0.7kPa
n2.16
DOI: https://doi.org/10.2478/acee-2023-0024 | Journal eISSN: 2720-6947 | Journal ISSN: 1899-0142
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Language: English
Page range: 151 - 159
Submitted on: Jan 13, 2023
Accepted on: Mar 14, 2023
Published on: Jul 20, 2023
Published by: Silesian University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year
Keywords:
Finite element method,
Rainfall,
Root-reinforcement,
Slope stability,
Strength reduction
Related subjects:
Architecture and design,
Architecture,
Architects, buildings

© 2023 Barbara Świtała, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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