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S
sciencedirect.com
article
https://www.sciencedirect.com/science/article/pii/S2772883825000731
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 [...] 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 [...] Under a Creative Commons license
Open access
## Highlights
•Dual-role geotextiles enhance slope stability under drawdown conditions.
•Drainage-enabled geotextile achieves a 24 % higher FOS than non-drainage type.
•Combined primary and secondary geotextiles prevent shallow failure surfaces.
•Permeable geotextiles accelerate pore pressure dissipation, lowering phreatic line.
•Sustainable geotextile solutions reduce slope failure risks amid climate uncertainty.
## Abstract
S
scribd.com
article
https://www.scribd.com/document/318681998/Geotextile-Reinforced-Slope
This document provides an overview of a slope stability analysis model that examines a steep slope reinforced with three different geotextile materials. The model includes a surcharge load added at the top of the slope and analyzes a wedge type failure surface passing through the ends of the reinforcement and toe of the slope. Additional examples of slope stability models are available in the Slide verification manuals and examples folder.
# Geotextile Reinforced Slope Analysis [...] Geotextile Reinforced Slope Analysis
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# Geotextile Reinforced Slope Analysis
Geotextile Reinforced Slope Analysis
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# Geotextile Reinforced Slope Analysis
A
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. [...] The geometry of the slope, incorporated materials, soil, environmental (soil gasses) and geological forces (seismic and groundwater) are only a few of the factors to consider in determining slope stability. A careful analysis can assess the likelihood of sliding or collapse of the slope, its impacts and proper reinforcement techniques. [...] 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
E
etasr.com
article
https://www.etasr.com/index.php/ETASR/article/download/5842/3109
all the necessary analyses to design both homogenous and non-homogenous embankments with geotextile reinforcements. Keywords-geotextile; reinforced slope design; deep-seated failure; Bishop's simplified method; seismic analysis I. INTRODUCTION Civil engineers frequently utilize reinforced soil structures to stabilize embankments and slopes. Geosynthetic reinforced soil slope stability has been analyzed in . Various natural and man-made factors may lead to slope instability . Different factors [...] aimed to design a geotextile-reinforced slope for a target FoS (FoST), using the following steps: Checking unreinforced stability of the final slope configuration to determine the zone of soil contributing to failure and likely to be dislodged from the original soil mass. FHWA recommends values for sliding, local squeezing/bearing capacity failure, and deep-seated stability. Checking the estimated tensile strength of soil reinforcement to achieve the desired FoS with the design chart data [...] the bottom boundary represented by line EF. If any trial surface violates any of these conditions, they are termed "invalid" and are not considered for stability analysis. Fig. 1. Entry-exit method. C. Design of a Stable Reinforced Slope The developed tensile force in the reinforcement must be determined to determine the stability of the reinforced soil slope. The tensile force generated by the reinforcement contributes to an increased resistance moment around the center of rotation of the
L
library.geosyntheticssociety.org
article
https://library.geosyntheticssociety.org/wp-content/uploads/resources/proceed…
Salih Keskin and Laman 2014). The outcome of these research has established that reinforcing slopes with geosynthetic layers significantly improves the bearing capacity of the footing and reduces settlement. The literature shows that there is a limited study on the stability analysis of reinforced slopes that are not subjected to footing loads on the crest. A typical application of the outcome of such investigations is landscape works. Mehdipour et al. (2013) investigated the stability of [...] 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 [...] following problem: Determine the factor of safety of a reinforced and unreinforced sandy soil slope with β=50°, γ=16.5 kN/m3, c’=1 kPa, ϕ’=33°, and H=3 m 4.1 Solution It is first required to calculate the stability number, N=c’/γHtan ϕ’ . For this case N=0.03. Using the calculated N value and the stability charts presented in Figure 3 (a-b), the factors of safety for the unreinforced and reinforce slopes are calculated to be 0.85 and 1.25, respectively. It is shown in this analysis that
C
calhoun.nps.edu
research
https://calhoun.nps.edu/bitstream/handle/10945/28542/slopereinforceme00sets.pdf
by DM Setser · 1990 · Cited by 1 — The steps for a reinforced slope design should include checks for internal (including slope face stability) and external stability. The slope stability design
K
kutcresources.ku.edu
research
https://kutcresources.ku.edu/storage/1621615382_GeoProperties-Han5-9-12-2.pdf
Longer pins are advisable for use in loose soils Slope Pin Spacing (ft) Steeper than 3(H) : 1(V) 2 3(H) : 1(V) to 4(H) : 1(V) 3 Flatter than 4(H) : 1(V) 5 Why is Anchorage Needed Sometimes ? tan tan C tan tan FoS i Typical Ci = 0.6 to 0.8 Typical Geosynthetic Layout for Reinforced Slope FHWA NHI-07-092 Face Options for Reinforced Slopes Collin (1996) Slope Stability Analysis Courtesy of Leshchinsky From ReSSA Software MSE Wall vs. Reinforced Slope Increase Space • Slope: Face inclination < [...] AASHTO (2006) Grab strength lb 315 200 250 157 Sewn seam strength lb 280 180 220 140 Tear strength lb 110 80 90 56 Puncture strength lb 620 433 495 309 Ultraviolet stability 50% retained strength after 500 hours of exposure Geotextile Class Class 1 Class 2 Units Elongation (%) < 50 > 50 <50 >50 Design of Geotube Input: Pressure head, b1 Circumference, S Output: Tube heights, H, H’ Tube width, B, B’ Geotextile strength, T Next Presentation: Case Studies • Simple Slope with Temporary Toe [...] 50% passing No.200 sieve) For CU≤2 or CU≥8 B=1 For 2 ≤ CU ≤ 4 B=0.5 CU For 4 < CU < 8 B=8 / CU Wovens B=1 & O95 ≤ D85 Nonwovens B=1.8 & O95 ≤ 1.8 D85 Unstable Soils Dynamic Flow O95 ≤ 0.5 D85 Performance Tests to select Suitable Geotextile D95 ≤ B D85 O95 ≤ 0.3 mm For less critical applications and less severe conditions: kgeotextile ≥ ksoil For critical applications and severe conditions: kgeotextile ≥ 10 ksoil % Passing #200 sieve: < 15% 15% to 50% >50% Permittivity Required: Ψ ≥ 0.5 sec-1 Ψ
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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.