Problem: Poor load-bearing soils pose a significant problem for transportation and construction needs. Soil stabilization for unpaved areas, such as access roads, maintenance roads, parking lots, subgrade improvement, etc can be highly vulnerable to near-surface shear failure and rutting, especially in moist conditions or areas with higher expected loads. For road base stabilization typically, engineers bridge over weak soils with rigid structures such as thick, reinforced concrete for roads and highways. However, such techniques are prohibitively expensive and inordinately difficult to install. The poorer the quality of the sub-base and the heavier the expected loads, the greater the amount and better the quality of support required.
From an environmental viewpoint, hard-pavement, as an impervious surface, is far more harmful for the environment than a porous surface. If the environment is a primary concern for the construction application, then a pervious solution should be considered.
Solution: EnviroGrid® provides a direct, cost-effective solution. The high-strength cell walls maintain the shape and integrity of the structure, allowing for heavy equivalent axle loads without fear of lateral movement of the fill material. The cellular design of EnviroGrid® also distributes the loads to an extended area, thus reducing the stress to the grid itself as well as to the sub-grade below. The thickness of the overall framework and sub-base can be decreased with equivalent or greater structural integrity. In most cases the EnviroGrid® solution can reduce a typical cross section to 1/3 or the original design. This can also create pavement reduction due to the higher base structural value.
Using EnviroGrid for road base reinforcement also allows for lower quality aggregates found locally, eliminating the need to import better or more material. Compact sections of EnviroGrid filled with sandy soil can thus replace truckloads of crushed stone or other granular fill or even asphalt or concrete. The EnviroGrid can also be used as the form for a geocell reinforced concrete.
If porous pavement for natural groundwater drainage is desired, EnviroGrid® allows for the use of permeable aggregates while maintaining sufficient weight-bearing capacity. All of these benefits can be of great use for intermodal yards, port yard stabilization, load transfer platforms, container storage yards, oil and gas rig pads, haul roads, wind energy roads and pipe yards. The EnviroGrid system can also be used for a reinforced porous layer for tree root protection and porous paver base stabilization.
For certain applications the EnviroGrid can be used in conjunction with other geosynthetic materials such as geotextiles, biaxial grids, triaxial grids, geogrids and geomembrane liners.
Call or email Geo Products ([email protected]) with your specific project needs and challenges. The Geo Products team is ready to help develop the right solution for your project.