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istasazeh-co.com
article
https://istasazeh-co.com/wp-content/uploads/2021/11/Soil-Strength-and-Slope-S…
Duncan, J. M., Low, B. K., Schaefer, V. R., and Bentler, D. J. (1998).
STABGM 2.0—A computer program for slope stability analysis of reinforced and unreinforced embankments and slopes, Depart-ment of Civil Engineering, Virginia Tech, Blacksburg, April. [...] Ausilio, E., Conte, E., and Dente, G. (2001). Stability analysis of slopes reinforced with piles, Computers and Geotechnics, 28, 591–611.
Ayres, D. J. (1959). Grouting and the civil engineer, Transaction of the Society of Engineers, 114–124.
Ayres, D. J. (1961). The treatment of unstable slopes and rail-way track formations, Journal of the Society of Engineers, 52, 111–138. [...] For reinforced slopes the reinforcement pattern assumed for the analyses should be shown on an appropriate figure (Figure 15.9). The reinforcement can either be shown on the main figure used to summarize the analysis, or if the rein-forcement is relatively complex, a separate figure may be preferable. The figure should clearly show the spacing of the reinforcement and its length. Appropriate information should also be given for the force in the reinforcement. This may consist of information
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library.geosyntheticssociety.org
article
https://library.geosyntheticssociety.org/wp-content/uploads/resources/proceed…
analysis. To reduce the annoyance of facing unknown challenges for engineers, this paper proposes that a conventional program such as ReSSA can still be used for unsaturated slope stability analyses. However, the reduced strength parameters observed using the above modified simple direct shear test must be used to account for the effect of infiltration on strength loss. For normal and earthquake conditions, drained or undrained strength parameters applied for stability analyses of fill slope [...] of wetting on stability. The sophisticated failure mechanisms and time-consuming analyses for unsaturated soils also make it difficult for most engineers to integrate theory into practice. This paper presents a case study and adopts a practical approach to the problem in which a geosynthetic reinforced slope collapsed after it was attacked by a typhoon. A modified direct simple shear test was derived to observe the strength loss of compacted fill upon wetting. Computer limit equilibrium [...] Lee, T.S.,Sharma, S. & Boyce, G.M. 2002. Slope stability and stabilization methods. 2nd. ed., John Wiley and Sons, Inc., New York, NY, USA. Cabarkapa, Z. & Cuccovillo, T., 2005. Automated triaxial apparatus for testing unsaturated soils. Geotechnical Testing Journal, ASTM, 29 (1), 1-9. Chen, H., Lee, C.F. & Law, K.T. 2004. Causative mechanisms of rainfall-induced fill slope failures. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 130 (6), 593-602. Collins, B.D. & Znidarcic, D.
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ace.il.pw.edu.pl
research
https://ace.il.pw.edu.pl/pdf-175624-111377?filename=111377.pdf
Research paper Stability analysis of ultra-high and steep reinforced soil fills slopes based on strength reduction Yucong Gao1, Yue Zhao2, Tianyuan Xu3, Jinlong Xu4 Abstract: The research focuses on solving the important problem of slope stability in the field of civil engineering. The study adopted an advanced strength double reduction coefficient method for slope stability analysis, which considers the different influence weights of cohesion and internal friction angle, and reduces them with [...] Y. Yang, T. Chen, W. Wu, and H. Zheng, “Modelling the stability of a soil-rock-mixture slope based on the digital image technology and strength reduction numerical manifold method”, Engineering Analysis with Boundary Elements, vol. 126, pp. 45–54, 2021, doi: 10.1016/j.enganabound.2021.02.008. [...] Y. Hong, Z. Shao, G. Shi, and J. Liu, “Stability and countermeasures for a deposit slope with artificial scarp: Numerical analysis and field monitoring”, Advances in Civil Engineering, vol. 2020, art. no. 8822080, 2020, doi: 10.1155/2020/8822080.
W. Chen, D. Li, T. Ma, H. Fu, and Y. Du, “Stability analysis of a slope considering two reinforcement processes”, Geofluids, vol. 2020, art. no. 8828747, 2020, doi: 10.1155/2020/8828747.
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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 [...] C. J. (2000). Geosynthetics: Innovative materials and rational design. GeoEng2000: An International Conference on Geotechnical and Geological Engineering (pp. 1124-1155). Melbourne, Australia: CRC Press. S&P. (2009). Geosynthetic reinforced steep slopes. Retrieved February 2, 2012, from S&P Clever Reinforcement Company: en/erd_felsbau/slope_geosynthetic_reinf._steep_slopes/S_P_Slope_Rock_stabilisation_complete .pdf. Sarma, S. K. (1979). Stability analysis of embankments and slopes. ASCE [...] (γu) = 125 lb/ft3 Reinforced Soil: Internal Friction Angle (ϕrʹ) = 34° Cohesion (crʹ) = 0 Density (γr) = 125 lb/ft3 Depth of Water Table (dw) = 5 ft Figure 36. Engineering Properties of Foundation, Retained, and Reinforced Soils. 84 Figure 37. Depth of Water Table. Check Unreinforced Stability The stability of the unreinforced slope was evaluated using rotational and translational analysis. To determine the location of the critical zone, a range of upper and lower points for circular arcs were
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researchgate.net
research
https://www.researchgate.net/publication/346937425_Stability_analysis_method_…
This paper reports a new stability analysis method for geogrid reinforced expansive soil slopes. The additional pullout force of the free zone due to the
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cdn.glenraven.net
article
https://cdn.glenraven.net/geogrid/pdf/en_us/StrataSlope_Reinforced-soil-slope…
usable space at the top (Figure 1) or toe of the slope, significantly reducing the amount of fill required to construct the slope and, as mentioned earlier, eliminating the expense of costly facing elements. ANALYSIS Reinforced slopes are currently analyzed using modified versions of the classic limit equilibrium slope stability methods. A circular or wedge-type potential failure surface is assumed, and the relationship between driving and resisting forces or moments determines the slope’s [...] it was shown that the use of horizontally placed geosynthetic reinforcement to stabilize surficial soils in slope applications is a commonplace procedure. For steep reinforced slopes, for example, relatively short secondary reinforcement layers are placed between the primary reinforcement to provided stability to the surface soil during and after construction to help with the growth of vegetation. ANALYSIS The cross section in Figure 17 illustrates a typical steep slope arrangement with geogrid [...] a licensed design professional. ________________________________________________________________________ © Copyright 2010 by Strata Systems, Inc. Page 3 Version 100119 REINFORCED SOIL SLOPES AND EMBANKMENTS For the purposes of this document, a reinforced slope is defined as a compacted fill embankment that incorporates the use of horizontally placed geosynthetic reinforcement to enhance the stability of the soil structure. This broad definition encompasses many and varied applications. In this
S
scdot.org
article
https://www.scdot.org/content/dam/scdot-legacy/business/pdf/geotech/2022-by-c…
overly conservative design). The frictional resistance provided by the weakest layer, either the reinforced soil, the foundation soil or the soil-reinforcement interface, should be used in the analysis. Figure D-12, Sliding Stability Analysis (Elias, Christopher and Berg (2001)) A simple analysis using a sliding block method can be performed as a check. The method also assumes that the reinforcement layers are truncated along a plane parallel to the slope face, which may or may not be the case. [...] test. Slope stability analyses should account for interface shear strength along a geocomposite drain. The geocomposite/soil interface will most likely have a friction value that is lower than that of the soil. Thus, a potential failure surface may be induced along the interface. Geotextile reinforcements (primary and intermediate layers) must be more permeable than the reinforced fill material to prevent a hydraulic build up above the geotextile layers during precipitation. Special emphasis on [...] D-24 Figure D-12, Sliding Stability Analysis ....................................................................... D-26 Figure D-13, Local Bearing Failure (Lateral Squeeze) ............................................... D-28 Figure D-14, Groundwater and Surface Drainage ..................................................... D-29 January 2022 D-1 APPENDIX D REINFORCED SOIL SLOPE DESIGN GUIDELINES D.1 INTRODUCTION This Appendix outlines SCDOT’s design methodology for Reinforced Soil Slopes
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onlinepubs.trb.org
article
https://onlinepubs.trb.org/Onlinepubs/sr/sr247/sr247-017.pdf
all cases Stability analysis should include consideration of seepage forces Stability analysis must be performed to ensure proper placement of lightweight materials Consider reinforced steep slopes for limited right-of-way Stability and soil-structure analyses are required. Study must be made of in situ soil shear strength; economics of method. depends on anchor capac-ity, depth, and frequency Must consider stresses imposed on reinforcement during construction Design methods not well [...] 1990. North American Practice in Reinforced Soil Systems. In Design and Performance of Earth Retaining Structures: Proceedings of a Conference, Ithaca, N.Y. (P. C. Lambe and L. A. Hanson, eds.), Geotechnical Special Publication 25, American Society of Civil Engineers, New York, pp. 322-346. Mitchell, J. K., and W. C. B. Villet. 1987. NCHRP Report 290: Reinforcement of Earth Slopes and Embankments. TRB, National Research Council, Washington, D.C., 323 pp. Morgenstern, N. R. 1982. The Analysis of [...] into re-inforced soil [Figure 17-14(e)] and in situ rein- Landslides: Investigation and Mitigation forcement. In situ reinforcement systems include soil nailing [Figure 17-14(J)], micropiles, pin piles, and root piles. Reinforced soil is applicable to sit-uations in which the reinforcement and backfill are placed as the slope or wall is constructed. Common reinforcing elements include steel strips (Reinforced Earth), welded wire sheets, bar mats and meshes, geotextiles, geogrids, and fibers.