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sciencedirect.com
article
https://www.sciencedirect.com/science/article/pii/S2772883825000731
Global warming has intensified erratic climatic events, such as increased rainfall, flooding, and rapid drawdown, often triggering slope failures. This study investigates the influence of primary and secondary geotextile reinforcements on the stability of unsaturated soil slopes under rapid and transient drawdown conditions. Seepage forces were analyzed using the effective stress B-bar method and finite element method (FEM), while slope stability was assessed using the limit equilibrium method [...] equilibrium method (LEM) integrated with the unsaturated soil mechanics concepts. Results revealed that the combined use of the primary and secondary geotextile reinforcements significantly improves slope stability by mitigating shear stresses near the slope face, reducing shallow failure surfaces, and ensuring global stability. Drainage-enabled geotextiles were particularly effective, facilitating rapid dissipation of pore pressure, lowering the phreatic surface, and achieving a higher factor [...] a higher factor of safety (1.790) compared to non-drainage geotextiles (1.439). These findings highlight the dual role of geotextiles in providing reinforcement and drainage, confirming their potential as a sustainable solution for mitigating slope failures during rapid drawdown in the face of climate uncertainty.
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link.springer.com
article
https://link.springer.com/article/10.1007/BF00880706
A procedure for the stability analysis and design of geosynthetic reinforced soil slopes over a firm foundation is described. Firstly the unreinforced slope is analysed, and for this a circular failure method is used which allows a surcharge load to be taken into account. Any method of slip circle analysis could be used to identify the coordinates of the centre of the slip circle, its radius and the minimum factor of safety. In this study, both internal and external stability analysis of the [...] analysis of the reinforced slope is presented. Internal stability deals with the resistance to pullout failure within the reinforced soil zone resulting from the soil/reinforcement interaction. The external stability is considered by an extension of the bilinear wedge method which allows a slip plane to propagate horizontally along a reinforcing sheet. The results for total tensile force, internal and external stability are presented in the form of charts. [...] Google Scholar
Leshchinsky, D. and Reinschmidt, A.J. (1985) Stability of membrane reinforced slopes,American Society of Civil Engineers, Journal of Geotechnical Engineering,111, 1285–1279.
Google Scholar
Murray, R. (1982) Fabric reinforcement of embankments and cuttings, inProceedings of the Second International Conference on Geotextiles, Las Vegas, Nevada, USA,3, pp. 707–13.
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library.geosyntheticssociety.org
article
https://library.geosyntheticssociety.org/wp-content/uploads/resources/proceed…
2. Slope geometry, reinforcement layout and soil parameters used in the study: (a) 40°, 50°, 60° unreinforced slope; (b) 40° reinforced slope; (c) 50° reinforced slope; (d) 60° reinforced slope. 3. STABILITY ANALYSIS AND DEVELOPMENT OF DESIGN CHARTS The stability analysis of the slopes presented in Figure 2 (a-d) was carried out using the limit equilibrium method (LEM) provided in a commercial software, Slope/W. It should be noted that Slope/W has also been used by other researchers (Sun and [...] (Sun and Zhao 2013, Seward et al. 2011) to develop stability charts. The slope stability modelling was conducted by adopting the Morgenstern-Price method of analysis, auto-locate critical slip surface search technique, Mohr-Coulomb soil model and reinforcement fabric option in the software. Details on the modelling process has been discussed by Baah-Frempong and Shukla (2018) Based on the model validation carried out by Baah-Frempong and Shukla (2018) using data reported by Zonberg et al. [...] this analysis that reinforcing the slope will improve F by 47% (almost double) from unstable state (F<1) to a stable condition (F = 1.25). 5. CONCLUSIONS A parametric study has been conducted to determine the influence of soil strength parameters on the factor of safety of low-height (3 m) unreinforced and reinforced slopes with varying angles from 40° to 60°. The study was conducted using the limit equilibrium method, available in the commercial software, Slope/W. Based on the results and
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library.ctr.utexas.edu
research
https://library.ctr.utexas.edu/hostedpdfs/tsusm/0-6792-1.pdf
Analysis Figure 20. External Stability Analysis of Geosynthetic Reinforced Steep Slopes (Berg et al., 2009). The analysis performed in Step 5 should provide the factor of safety for failure surfaces behind the reinforced soil zone. However, as a check, classical rotational slope stability methods such as Bishop (1955), Morgenstern and Price (1965), Spencer (1967), or others may be used. Appropriate computer programs may also be employed. To determine local bearing failure at the toe (lateral [...] Geotextile Design Method: Static and seismic slope stability analysis. Construction Sequence: The installation of wire mesh was found to be straightforward. This ensured that the construction tolerances required for the face were easily met and the work was completed within the tight construction period. Polyamide matting was used a surface erosion control blanket at the toe of the slope and geotextile was used as a separator between the rock facing and the reinforced backfill. Cost [...] recommended the use of geogrid or a combination of geogrid and geotextile for slope reinforcement, while the others recommended independent use of geotextile. Some prefer high strength geotextiles over geogrids, as they provide a separation function and can be more cost effective in certain cases. Figure 2. Recommended Design Methods. The internal stability of a soil slope can be determined by four basic factors, including the slope angle (β), soil weight (W), cohesion (c), and internal
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onlinepubs.trb.org
article
https://onlinepubs.trb.org/Onlinepubs/trr/1985/1031/1031-002.pdf
soil walls are presented. The analytical approach is based on limiting equilibrium combined with variational extremization. Because of the generality of the analysis, the results can also be applied to a wide range of problems of similar nature (e.g., the stability of geotextile-reinforced earth slopes). The analysis results indicate that the critical slip surface is log-spiral and that on the verge of failure, each geotextile sheet is orthogonal to the radius vector defining its inter-section [...] of conventional retaining wall theories (5,6) and others are derived from simpli-fied slope- ;tabili ty analysis methods <l-!QJ . Each approach basically utilizes a postulated failure mechanism, that is, an assumed failure surface and the inclination of the geotextile relative to it. The analytical approach used in this work is founded on the limit equilibrium method combined with extremization utilizing variational calculus. It is free of unnecessury uooumptiono, natisfies all equations of [...] soil-geo-textile interaction, however, is -highly nonlinear and, therefore, a complicated constitutive relation-ship must be employed in this analysis (_!). As a consequence, the application of the f ini te-elemen t method to standard problems might be too involved and impractical at the present time. There are currently numerou5 simplified anu.lysia methods that have been developed to assess the sta-bility of geotextile-reinforced earth structures. Some are an extension of conventional
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agruamerica.com
article
https://agruamerica.com/slope-stability-analysis
The correct geosynthetic reinforcement must be determined to meet both long-term strength and soil interaction requirements. Failures commonly occur at interfaces, especially where geotextile and soil interact. Therefore, a stability analysis can evaluate the compatibility of the slope with a geosynthetic material as well as ensure the safe design of a slope. [...] Slope stability analysis accomplishes four key objectives: it determines the long-term survivability of existing and excavated slopes, evaluates the effectiveness of proposed reinforcements, calculates shear strength and designs a successful slope.
## Conducting Slope Stability Analysis [...] Slope stability analysis determines stability based on a “factor of safety.” The factor of safety is basically a ratio of material shear strength properties to applied shear stress. It can also be thought of as a ratio of the maximum load a slope can sustain to the actual load that is applied. The factor of safety can be determined using cohesive and friction interface strengths. Cohesive forces are typically ignored unless a strength-based analysis is used instead of sole reliance on friction
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ascelibrary.org
article
https://ascelibrary.org/doi/abs/10.1061/IJGNAI.GMENG-8428
Google Scholar
Bishop, A. W. 1955. “The use of the slip circle in the stability analysis of slopes.” _Geotechnique_ 5 (1): 7–17.
Google Scholar
Chen, W. F. 2007. _Limit analysis and soil plasticity_. Amsterdam, The Netherlands: Elsevier.
Google Scholar
Chen, Z., L. Zong, P. Sun, and H. Cai. 2016. “Investigation on possible failure modes of geotextile reinforced slopes and stability analysis methods based on Coulomb theory.” _China Civ. Eng. J._ 49 (6): 113–122.
Google Scholar [...] Google Scholar
Li, Z., and X. Yang. 2022. “Stability assessment of 3D reinforced soil structures under steady unsaturated infiltration.” _Geotext. Geomembr._ 50 (3): 371–382.
Google Scholar
Luo, N., R. J. Bathurst, and S. Javankhoshdel. 2016. “Probabilistic stability analysis of simple reinforced slopes by finite element method.” _Comput. Geotech._ 77: 45–55.
Google Scholar [...] effective discrete iteration method was proposed. Second, the rationality of the method proposed in the paper was verified by comparing the existing examples and calculation methods of GRSs. The results showed that the method can consider multiple potential failure modes of GRSs and accurately determine the critical slip surface and minimum safety factor. Finally, the method examined the influences of soil mechanical parameters, reinforcement distribution patterns, and
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rosap.ntl.bts.gov
official
https://rosap.ntl.bts.gov/view/dot/37897/dot_37897_DS1.pdf
166 Case Study #55: Dickey Lake Roadway Grade Improvement Location: Dickey Lake, Montana Owner: Montana Department of Transportation Purpose: Support Structure for Roadway Geosynthetic Material: Reinforcement: Geogrid (6850 lb/ft) Facing: Biaxial Geogrid Erosion Control: Welded Wire Forms & Organic Blanket Embankment Soil: Glacial Till Slope Height: 30 ft to 60 ft Slope Angle: 1.5H:1V to 0.84H:1V Design Method: Global Stability Analysis with Safety Factors Construction Specifications: Montana Department of Transportation Construction Sequence: Reconstruction of a portion of US 93 around the shore of Dickey Lake required the use of an earth retention system to maintain grade and alignment.