Geosynthetically Reinforced Soil (GRS) refers to engineered fill consisting of closely spaced alternating geosynthetics and granular fill layers. The concept of reinforced soil has been around for millennia. Sections of the Great Wall of China were constructed around 200 BC using alternating layers of grass and willow twigs and granular soils. The use of GRS has been studied extensively by many state departments of transportation and federal organizations, including the National Cooperative Highway Research Program (NCHRP). This research has guided wide-scale acceptance of the GRS concepts across the country.
Typically, our GRS systems are used in conjunction with other technologies such as soil nail walls, micropiles, and retaining wall block facing. Another well-known reinforced soil structure is a mechanically stabilized earth (MSE) wall. While the concept may appear similar to GRS walls on the surface, stark differences exist between the MSE and GRS concepts. GRS walls are internally stable, utilize closely spaced geosynthetics, and develop a high safety factor, while MSE walls have a 5% industry-accepted failure rate.
Our design-build experts can help assess the best approach for your next project.
