8 results ·
● Live web index
S
solmax.com
article
https://www.solmax.com/ca/en/blog/what-are-the-key-considerations-in-designin…
Geosynthetic materials, including geotextiles and geogrids, play a versatile role in RSS, enhancing structural support, facilitating drainage, and supporting vegetation growth. These synthetic solutions bridge the gap between soft and hard facing options for reinforced slopes, offering tailored reinforcement that meets specific site requirements. They are particularly valuable in environments subjected to dynamic weather conditions and hydraulic pressures, where traditional materials might fail [...] ### Design principles of reinforced soil slopes
The design of reinforced soil slopes hinges on two critical components: the facing system and the reinforcement strategy. The facing system is integral to erosion protection and structural support, enabling the formation of slopes that surpass natural stable inclinations without compromising stability. Secondary reinforcement, typically comprising geosynthetic materials, aids in compaction and mitigates surficial sloughing at the slope face. [...] Reinforced slopes that are 1(H): 1(V) and steeper typically require additional facing support during construction. A geosynthetic face wrap and/or a hard armor facing support system is often employed in these scenarios. Particularly when constructing slopes with materials like silts and poorly graded sands and gravels, or in environments subjected to external erosive forces such as mild water currents and/or wave attack, robust facing supports are essential. Temporary supports such as wooden
S
sciencedirect.com
article
https://www.sciencedirect.com/topics/engineering/geosynthetic-reinforced-soil
While the design of earth-retaining structures is based largely on lateral earth pressure theory, and slope designs are generally based upon slope stability analyses, designs for retaining walls and slopes reinforced with geosynthetic inclusions begin to have much greater similarities. Both applications depend on internal soil-reinforcement interaction (pullout resistance of the reinforcing members), and tensile rupture (tear strength) of the geosynthetic material. Designs must include [...] assumed surface is generally taken to be curved. For simple limit equilibrium analyses, the assumed surface is taken as circular. Geosynthetic reinforcement is placed at specified locations (and vertical spacing), but the spacing will not be dependent on lateral earth pressures; rather, it will usually be designed to provide resistance to rotational slope failure (Figure 14.17). In fact, reinforcement may not need to be placed evenly or throughout a soil slope to gain sufficient stability. The [...] In Table 5, the studies which employ C&D waste as fill materials in geosynthetic reinforced infrastructures are compiled. Geosynthetics are usually used to reinforce walls, highway embankments, steep slopes, and bridge abutments. In a geosynthetic-reinforced structure, the pull-out failure mechanism caused by the reinforcement anchorage strength and the direct shear failure mechanism due to the sliding at the interface between the fill and the geosynthetics are the two parameters that are often
F
fdotblob.core.windows.net
article
https://fdotwww.blob.core.windows.net/sitefinity/docs/default-source/roadway/…
Topic #625-000-002 FDOT Design Manual 263 - Geosynthetic Design 263 Geosynthetic Design 263.1 General This chapter provides design guidance for geosynthetic reinforced soil slopes and geosynthetic reinforced foundations over soft soils. “Geosynthetic” is a generic term for all synthetic materials used in geotechnical engineering applications and includes geotextiles and geogrids. Reinforced soil slopes should be utilized only when unreinforced slopes are not appropriate and retaining walls are [...] soil properties for the fill material chosen by the contractor meet or exceed those used in the redesign. See Standard Specifications, Section 145 for requirements associated with contractor-initiated redesigns. 263.4 Geosynthetic Reinforcement Design Considerations Only those geosynthetic products approved for usage on reinforced soil slopes in the APL are eligible for use on FDOT projects. Design the geosynthetic reinforced systems using comprehensive stability analyses methods that address [...] or supplier; the product brand names are not shown on the plans. Design reinforced slopes using the maximum reinforcement spacing allowed. For soft soils, design the reinforcement and provide the minimum total strength required. Include the following information in the plans: • Required reinforcement strength based on the maximum allowed vertical spacing of these materials, • The extent and the number of layers of geosynthetic reinforcement, • Vertical spacing of geosynthetic reinforcement, •
L
library.ctr.utexas.edu
research
https://library.ctr.utexas.edu/hostedpdfs/tsusm/0-6792-1.pdf
soil slopes with emphasis on the use of geosynthetics as primary reinforcement material. A GRSS design example is also provided in Appendix E. Step 1: Establish the Geometric, Loading, and Performance Requirements for Design The geometric and loading requirements of the slope must first be determined through careful consideration of the purpose of the design and its overall dimensions (slope height and slope angle). Surcharge load, temporary live load, and seismic acceleration must also be [...] design guidelines for GRSS. The existing topography, subsurface conditions, and soil properties must be considered when evaluating the site for construction. The investigation should include determining the availability of the required type of reinforced fill and backfill materials. 3. Geogrid or geotextile constructed of polyester, polypropylene, or polyethylene are recommended for soil slope reinforcement. The material should be resistant to heat, ultraviolet light, attack by bacteria and [...] respondents claimed that many geosynthetic reinforcing materials provided by a variety of manufacturers can be used to construct steep slopes. A significant issue to be dealt with is the deformation behavior of such slopes, particularly if lower quality fill materials are used. In order to use materials with fines in excess of 15 percent, both the strength and deformation behavior of the soil and reinforcement needs to be considered, including both the short- and long-term behavior. The
D
dot.ca.gov
official
https://dot.ca.gov/-/media/dot-media/programs/engineering/documents/geotechni…
Geosynthetic Reinforced Embankments September 2023 Page 1 of 17 1 Reinforced Embankments Geosynthetic Reinforced Embankment (GRE) is a system that incorporates planar geosynthetic reinforcement within a slope (Figure 1) for slope inclinations less than 70 degrees from horizontal. A GRE is also referred to as a Reinforced Soil Slope. Situations where GRE may be used include: • • • • Limited right of way Shortage of fill quantity for slope construction Excess of excavated materials Distressed or [...] reinforcements. If necessary, one traffic lane may need to be closed during construction. Processed landslide debris may be used as reinforced soil if sufficient geosynthetic reinforcements are used, the reinforced soil materials do not cause creep, and proper subdrain is designed. To keep the slope dry, prefabricated vertical drains may be placed horizontally in conjunction with the geosynthetic reinforcements. 5 Execution and Communication During Design During design, close communication [...] Distressed or deteriorated slopes need to be restored. The components of a geosynthetic reinforced embankment include: geosynthetic reinforcements, reinforced soil, drainage system, and erosion control. The foundation below the GRE (foundation soil) and slope behind the GRE (retained soil) also affect the design of the GRE. Figure 1: Components of Geosynthetic Reinforced Embankment Geosynthetic Reinforced Embankments September 2023 Page 2 of 17 1.1 Common Applications of GRE a. New Construction
G
geosyntheticsmagazine.com
article
https://geosyntheticsmagazine.com/2010/08/01/green-geosynthetic-reinforced-so…
Geosynthetic-reinforced soil walls or slopes are also attractive solutions because of the flexibility they provide, as their design can be adapted to suit a range of different loads, solicitations, geometries, landscape features, and environments. Increasingly urban housing complexes and new tourist developments are emphasizing ecological awareness and care for the environment in their construction, and geosynthetic-reinforced soil walls are used because they meet the construction goals. [...] ## 3. Design for a ‘green’ reinforced soil wall or slope
A case history to describe the process of design for a geosynthetic-reinforced soil retaining wall or slope was designed and constructed in Costa Rica in January 2008. This slope was designed to have an erosion resistant facade of vegetation and for this it is referred to as a “green” reinforced soil slope.
### 3.1 Initial conditions [...] In this project, they are constructed from soil reinforced with geosynthetics with facades made from UV-degradable sacks filled with organic material and vegetation to create a natural appearance. This article provides a detailed description of the designs of the green reinforced soil walls and slopes.
S
scdot.org
article
https://www.scdot.org/content/dam/scdot-legacy/business/pdf/geotech/2022-by-c…
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 [...] of these thin and relatively compressible materials preclude reliable estimates of stress. The structural design properties of reinforcement materials are a function of geometric characteristics, strength and stiffness, durability, and material type. The 2 most commonly used reinforcement materials, steel and geosynthetics, must be considered separately as discussed in the following Sections: D.5.1.1 Inextensible Reinforcements For steel reinforcements, the design life is achieved by reducing [...] be estimated as: 𝑭𝑭∗= 𝟎𝟎. 𝟔𝟔𝟔𝟔∗ 𝒕𝒕𝒕𝒕𝒕𝒕𝝓𝝓𝒓𝒓 Equation D-22 1For geosynthetic strips use (a) 2Please note that geosynthetic strips have no measureable thickness. Figure D-11, Definitions of b, Sh and SV (Berg, et al. – Vol. I (2009)) D.7.4 Selection of Reinforcement The type of reinforcement to be used in the RSS shall be determined. The 2 types of reinforcement are extensible and inextensible. Extensible reinforcements consist of geosynthetic materials, typically geogrids (biaxial or uniaxial)
L
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 [...] Schneider, H.R. and Holtz, R.D. (1986) Design of slopes reinforced with geotextile and geogrid,Geotextiles and Geomembrane,3, 29–51.
Article
Google Scholar
Verduin, J.R. and Holtz, R.D. (1989) Geosynthetically reinforced slopes: a new procedure, inProceedings of Geosynthetics '89 Conference, San Diego, USA, pp. 279–90.
Wallace, R.B. and Fluet, J.E. (1987) Slope reinforcement using geogrid, inProceedings of Geosynthetics '87 Conference, New Orleans, USA, pp. 121–32.
Download references [...] Rowe, R.K. (1984) Reinforced embankment: analysis and design,American Society of Civil Engineers, Journal of Geotechnical Engineering,110, 231–145.
Google Scholar
Schmertmann, G.R., Chouery-Curtis, V.E., Johnson, R.D. and Bonaparte, R. (1987) Design charts for geogrid reinforced soil slopes, inProceedings of Geosynthetics '87 Conference, New Orleans, USA, pp. 108–20.