In early 2015, GeoStabilization met with representatives of the New Mexico Department of Transportation and visited the subject site. Approximately 180 feet of Reinforced Soil Slope (RSS) faced with gabion baskets along the western side of Highway 76 had experienced significant movement and failed the shoulder of the pavement section behind the top of the slope. This failure required the temporary realignment of the travel lanes. Additionally, the pavement was recently patched, and voids have already reformed, indicating that the slope was continuing to experience movement. In order to repair this slope failure, GeoStabilization installed Self-Drilling SuperNails®, through the existing gabion basket wall facing with our equipment mounted on a track-mounted excavator. GeoStabilization’s work required a single lane of traffic to be closed during soil nail installation. This approach required only intermittent traffic delays throughout the length of the project, thus minimizing the impact to the traveling public. Because the slope is continuing to experience movement, the SuperNails® were installed first in the upper-most top row, and the remaining rows were later installed with either a crane basket drill.
A variation of karst sinkhole grouting is the grouting of mined coal seams and workings located below existing infrastructure that exhibit the potential to propagate to the surface and cause sinkholes and/or subsidence.