Overview
What are Reinforced Steep Slopes?
Strata recognizes that maximizing land use is the most critical need and has a major cost impact on any site development. Challenges in resolving grade change on the site are increasingly necessary as land cost increases and the difficulty to develop property becomes commonplace. To address these challenges, we provide the technical basis and economic solution for severe slope challenges, problematic soil conditions and land development needs.
Applications of Reinforced Steep Slopes
StrataSlope™ systems use StrataGrid™ geogrids as reinforcing elements, combined with varied facing options to suit site requirements. The facing can be vegetated to provide a green aesthetic look or can be filled with stone for a more robust appearance. Steep slopes are classified as structures with a face that is less than 70 degrees from the horizontal.
Any structure greater than 70 degrees should consider our retaining wall solutions.
Key advantages of Reinforced Steep Slopes
SLOPE TYPES
Types of slopes
H:1V Or Flatter
1H:1V Or Steeper
Embankments
Types of fascia
There are several factors that can help determine the best facing option for your project. A major advantage of Strata’s Geosynthetic Reinforced Soi (GRS) system is that they offer highly geotechnical designed structures which have technical and commercial advantages over traditional techniques. Our systems are designed according to international standards and offer a long-term design life of 120 years and quality-controlled system installation.
a. StrataSlope™ G Web
StrataWeb® fascia system consists of flexible geocell panels as fascia elements and StrataGrid™ geogrids.
Depending on the project requirement, their ideal usage is in 3 or 4 cell wide panels for fascia.
StrataWeb® fascia system’s biggest advantages are that it comes in a collapsible form (easy transportation) and the installation can be carried out by unskilled labour.
Not to forget the aesthetics, the outermost strap of the StrataWeb® panels used as fascia can be made in green colour to match with the lush greenery around.
Slope Stability
Slope stability design is commonly evaluated by calculating the driving and resisting forces to determine the factor of safety against rotation or movement.
This is commonly utilised to define three failure regimes:
Internal
Failure surfaces that are contained entirely within the reinforced soil zone.
Compound
Failure surfaces that begin outside or behind the reinforced soil zone but pass through the reinforcement and exit in the foundation or through the structure face.
Global
Overall/deep seated failure surfaces that pass outside the reinforcement and into the underlying foundation soils.
Regardless of the failure regime, the designer must analyze numerous failure surfaces and isolate that surface which generates the least factor of safety for stability.
Computer software allows the designer to rapidly analyze thousands of failure surfaces and optimize reinforcement requirements to provide adequate factors of safety at the best economics. For each failure surface passing through a layer of reinforcement, the analysis considers the tensile strength of the reinforcement to investigate tensile rupture or failure, and geogrid pullout resistance.
Strata makes tools available to designers that allow easy selection of primary and secondary reinforcements. StrataSlope™ Software is a limit-equilibrium design package that automates primary geogrid reinforcement design utilizing circular or log-spiral failure surfaces with the Bishop’s Method of Slices. Additional tools are available that address surficial stability using parallel failure surface of infinite length (i.e. sliding wedge approach).
Gallery of Reinforced Steep Slopes Projects
Real-World Projects Showcasing Reinforced Steep Slopes with StrataSlope™, Geocell or Geogrid
Products used in Reinforced Steep Slopes
StrataWeb® (Product)
StrataSlope™ (System)
StrataGrid™ Uniaxial Geogrids (Product)
More success stories
StrataGrid® geogrids used as reinforcement for mechanically stabilized wall
The construction of the Riyadh metro project commenced, and it required the construction of retaining structures as access towards the metro station. These walls help save land space in busy areas and also enable faster construction.
Construction of a steep soil slope near rail road tracks
The South Carolina Department of Transportation (SCDOT) needed to provide a right-of-way for an access road adjacent to a CSX railroad line.
Green fascia for new roadways using StrataGrid® Geogrids and StrataWeb® Geocells
The client desired the reconstruction of a section of Bathurst Street for the Regional Municipality of York in Ontario, Canada. This vital road to the city needed widening to allow free-flowing traffic through a previously bottlenecked area.
Looking for a little more than light reading?
StrataWeb® Brochure
StrataGrid™ Brochure
StrataSlope™ Brochure
Slop Protection
Slop Liner Protection
CONSULTATION
From know-how to manufacture, installation and support.
Strata not only provides geotechnical products, but our team of 200+ engineers can help you with your turnkey project by supplying you with technical knowhow and support as to how our products can help you finish your projects in time while keeping costs down.
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