Rstabl is a fast and user-friendly computer program for stability analysis of reinforced soil slopes. Rstabl calculates the factor of safety with reasonable
(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. [...] 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
(Lg) of 6.4 m. The uniform vertical spacing (Sv) of 1.0 m between any two geotextile layers was chosen. To simulate staged construction method which is adopted at site, finite element tool PLAXIS 2D was used for stability analysis. The construction of slopes was simulated in 7 stages of equal height for all the slope inclinations. The results showed that minimum axial forces were developed at the top most geotextile layer for all the four slope inclinations (= 45, 60, 75& 90). Maximum [...] 2 Problem Description Available literature shows diverse opinions regarding the development of maximum axial force along slope height. Few literatures show that researchers have assumed maximum axial force at the toe of the slope.Other researchers found maximum axial force at mid height of the slope.In the present work, a parametric study has been carried out on geotextile reinforced slope using finite element based software PLAXIS 2D to identify the location of maximum axial force along [...] and validate finite element methods. Bergado et al. (2002) conducted stability analysis of embankment with and without reinforcement using PLAXIS 2D and concluded that single layer of high-strength geotextile (HSG) increases the critical slope height up to 1.5 times higher than that of the unreinforced case. HSG can significantly reduce vertical as well as horizontal displacement during plastic analysis. Zornberg and Arriaga (2003) conducted digital image analysis and centrifugal testing to
the FHWA sponsored computer program ReSSA (latest version) for the governing loading condition for each design section of the RSS structure. This software may be obtained at: Geotechnical Design Manual APPENDIX D D-32 January 2022 ADAMA Engineering, Inc. 12042 SE Sunnyside Road, Suite 711 Clackamas, OR 97015 USA Tel. (971) 224-4187 adama@geoprograms.com D.11 REFERENCES Berg, R. R., Christopher, B. R., and Samtani, N. C. (2009), Design of Mechanically Stabilized Earth Walls and Reinforced Soil [...] to provide a stable slope that meets the requirements of the project. According to Berg, et al. – Vol. II (2009): Calculate the total reinforcement tension per unit width of slope TS required to obtain the required resistance factor 1/φr for each potential failure surface inside the critical zone in the previous step that extends through or below the toe of the slope using the following equation: 𝑻𝑻𝑺𝑺= ቀ 𝟏𝟏 𝝋𝝋𝒓𝒓− 𝟏𝟏 𝝋𝝋𝒖𝒖ቁ∗ቀ 𝑴𝑴𝑫𝑫 𝑫𝑫ቁ Equation D-7 Where, TS = The sum of the required tensile force [...] reinforced slope with a computer program. Layout includes number, length, design strength, and vertical distribution of the geosynthetic reinforcement. The charts presented in Figure D-8 provide a method for generating a preliminary layout. Note that these charts were developed with the specific assumptions noted in this figure. Analyze the reinforced soil slope with the trial geosynthetic reinforcement layouts. The most economical reinforcement layout must provide the maximum stability
calculators and graphs, but now software is widely accepted as the standard for slope calculation. Most software is based on the limit equilibrium method of 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
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
There are different research software are there to analyses the slope stability. Which one would be the best suited for the soil slope
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.