Faulted pavement and other pavement surface failures are often caused by weak or insufficient support in the foundation soils. Patching or replacing the surface pavement can be costly and only temporarily fixes the problem. Ignoring the root of the problem will lead to premature failure of the replaced surface. Even the replacement of foundation soils becomes ineffective when trying to compact in a small area, such as beneath bridge approach and departure slabs. However, Nortex offers a solution to this problem. Injecting high-density polyurethane material at intervals of greater depths have shown to strengthen sub-grade soils sufficiently enough to extend the life of the surface pavement.
SOIL DENSIFICATION PROJECTS
SOIL DENSIFICATION VIA DEEP INJECTION
In the project pictured below, crews injected high-density polyurethane foam at intervals of greater depths to strengthen sub-grade soils sufficiently enough to extend the life of the surface pavement. Injection depths ranged from 2ft to 8ft below the surface pavement. In order to determine what these depths would be, crews used a penetrometer. This device measures the resistance of the sub-grade soils, giving an indication of how compacted the sub-grade soils are, indicating the soil quality.