Why use geogrids, and how to choose the right one?
Modern infrastructure has become increasingly sophisticated as engineers aim to balance the demands of a rising population with the global need for environmentally sound structures. These structures need systems that can deliver multiple functions throughout a long lifecycle without sacrificing quality. Geogrids, made from durable polymers, are perfectly suited for this type of high-demand construction. These geosynthetic materials feature interconnected, parallel sets of high-tensile ribs.
What are the applications of geogrids?
Reinforced soil structure
Geogrids are used to strengthen soil, allowing the construction of steep slopes, retaining walls, and embankments by improving stability and load-bearing capacity. They interlock with soil particles, creating a strong composite material that resists deformation.
Basal reinforcement
Geogrids provide a solid, secure foundation over weak soils, dispersing loads and reducing settlement, particularly under embankments and roadways. This reinforcement reduces differential settlements and extends the structure’s longevity.
Load transfer platform
By providing a foundation above soft soils, geogrids reduce differential settlement by efficiently shifting loads from embankments or buildings to more stable underlying layers.
Factors to consider when choosing a geogrid
Selecting the optimal geogrid for a project requires diligent planning and consideration of all key factors. Geogrids that are not strong enough or made of the wrong material for the load requirements will compromise the reinforced soil mass. Poor tensile strength will cause retaining wall failure, foundation settlement beyond tolerable limits or pavement cracking. A properly selected geogrid ensures long term material compatibility and continuous soil reinforcement. Although a lower quality geogrid may seem cheaper at first, it probably lacks the mechanical properties and long term durability for a reliable project. This will always result in higher costs for repairs or replacements. Finally, selecting a geogrid with a focus on sustainability contributes to a more ecologically sound project. An environment friendly option could involve considering geogrids created from recycled materials or those with a lower environmental footprint during production.
Strength and durability
The geogrid should possess high tensile strength that can handle the anticipated loads within the reinforced soil structure. Applications such as retaining walls, where the geogrid must stabilize and constrain soil mass without failing, are better suited for a robust geogrid. Because the geogrid will be exposed to severe weather conditions for the duration of the project, durability is equally crucial. This involves conditions like exposure to sunlight, rainfall and chemical degradation in the soil.
Compatibility with soil types
A geogrid that is compatible effectively with the surrounding soil is a suitable choice for reinforcement operations. Different soil types have varying properties, such as grain size and drainage properties. For effective interlock, the aperture size of the ideal geogrid should match the grain size of the soil. This will create enough friction and confinement to stop soil movement inside the reinforced area.
Ease of installation
Efficient installation leads to reduced project costs and completion of deadlines. Factors like roll width, weight, and the ability to unroll and lay flat can impact installation speed. Geogrids with features that reduce on-site cutting and require less manpower for deployment are generally preferred by engineers.
Elongation and stress-strain values
Elongation is defined by the amount a material stretches when put under stress. In geogrids, low elongation is preferable as it maintains the integrity of the reinforced soil mass. Geogrids that elongate excessively under load do not confine the soil adequately.
Project requirements
The specific deployment of the geogrid influences the selection process. To illustrate, uniaxial geogrids which possess high tensile strength in one direction are suitable for walls and slopes, while biaxial geogrids (offer strength in both directions) are plied in roads and pavements.
Resistance to chemicals
The geogrid should exhibit resistance to chemical degradation from the surrounding soil and other contaminants. Chances of premature failure are negated and a sustained performance is ensured.
Environmental impact
The focus on environmentally sustainable practices has been increasing over the years. Some geogrids are manufactured from recycled materials, and some manufacturers offer production processes with low ecological impact. Considering these factors contributes to an environmentally friendly project.
What makes Strata Geosystems’ geogrids the best?
Strata Geosystems set the standard in geogrid technology with their innovative products, StrataGrid uniaxial (SGU) geogrids and the series of StrataGrid biaxial (SGB) geogrid. Built with high-tenacity polyester yarns, these geogrids offer strong tensile resistance with minimal elongation—making them ideal for applications where stability is critical. A durable saturation coating protects the yarns from environmental wear, improving long-term performance in the field. Thanks to this combination of strength and durability, the geogrids work especially well in soil reinforcement and pavement support, where consistent load distribution and structural integrity matter most.
Superior tensile strength
StrataGrid geogrids provide industry-leading performance with outstanding stress-strain values. The uniaxial (SGU) line offers strengths up to 800 kN for heavy-duty reinforcement, while the biaxial (SGB) geogrids provide exceptional tensile resistance from 20kN/m to 150kN/m. Crucially, this high strength is achieved with minimal elongation, ensuring the reinforced structure remains stable and does not deform under load.
Longevity and sustainability
StrataGrid is built to last, with a lifespan of up to 100 years, so it keeps things stable and controls erosion over the long haul. The biaxial version (SGB) also helps by letting you use thinner pavement layers, which means less material and a smaller carbon footprint during construction. It’s a practical choice if you’re thinking about both performance and the environment.
Efficient functionality
StrataGrid biaxial (SGB) is engineered specifically to improve the modulus values of pavement base layers, optimizing the performance and longevity of infrastructure projects. Concurrently, StrataGrid uniaxial (SGU) provides primary reinforcement for structures like retaining walls and embankments, enhancing their structural integrity and strength for increased durability.
Easy installation
The SGB grid measures a width of 5m. It will provide minimal overlaps, limiting waste, and decreasing pavement costs. The SGB grid is designed to improve stability, with very little overlap during installation and reducing waste.
Here are real-life examples of Strata’s expertise in geogrid solutions. Two case studies showcase the geogrid’s adaptability and effectiveness in building reinforced soil walls in different locations.
StrataGrid™ and StrataBlock™ system used in reinforced soil wall project in Gujarat, India
The National Highways Authority of India’s project on NH-8 serves as a prime example of StrataGrid’s prevalence in the field of large-scale reinforced soil wall construction. The biggest challenge was the variable soil conditions and seepage water at each site, as per soil investigation report soil was weak and prone to settlement. To address these challenges a reinforced soil wall system was chosen as the best solution based on soil conditions. StrataGrid and StrataBlock were used for reinforced soil wall construction as they have proven performance and are easy to install. The economic and time saving benefits of reinforced soil walls over traditional methods played a major role in NHAI’s decision making. StrataGrid’s ease of installation and compatibility with local soil was the key to the project’s success. The project was a success using StrataGrid with local non-plastic soil, it proved StrataGrid’s versatility and adaptability in different locations. In short the project is a testimony to StrataGrid’s dominance in reinforced soil wall construction. StrataGrid’s application in large scale projects along with Strata’s technical expertise puts StrataGrid at the top for clients looking for high performance geogrid solutions
StrataGrid™ used in the construction of retaining walls at Al Qatif, Saudi Arabia
StrataGrid’s effectiveness in expediting construction of block fascia retaining walls in adverse soil conditions is exemplified by the Ministry of Municipal and Rural Affairs’ project in Saudi Arabia’s Eastern Province. The simplicity of the installation of StrataGrid allowed the project to abolish the 45-day deadline. Facilities like roll property reduced on-site cuttings, which made the installation process simply. Its built-in slope and self-alignment abilities ended the need for a slow cast-in-place concrete work. StrataGrid’s ability to retain the soil mass and improve load distribution, along with its compatibility with locally available non-plastic soils, tackled the issues related to weak foundations. To add to it, the inherent aesthetics of the precast StrataBlock system fulfilled the project’s requirement with a simplicity and sophistication that is synonymous with Strata. The project had a reduced carbon footprint compared to a conventional cast-in-place concrete wall, as the StrataBlock and geogrid system requires significantly less concrete mass.The efficiency and expertise demonstrated by Strata’s engineers is evident in this case, as they delivered a fast, efficient, and tailored solution.
Strata’s team of engineers provides technical expertise and support for turnkey projects, ensuring top-quality execution and maximum project profitability. We provide cost efficient, durable, environmentally friendly, sustainable and timely solutions for all geotechnical projects. Contact our team of experts.