A midstream transmission group asked GeoStabilization International® to design and construct a repair for a series of steep shallow landslides that had developed on a pipeline section traversing a steep, remote mountainside, more than a mile long. Traditional repair techniques were not feasible due to the site’s difficult access and the surrounding environmentally sensitive wetlands.
A GeoStabilization representative visited the site with the client’s engineer, performed site reconnaissance, and helped develop a repair concept. This field data was electronically forwarded to GeoStabilization’s in-house engineering group, who designed repairs using SuperNails® combined with high-strength wire mesh. Due to the severity of the slope’s grade, GeoStabilization’s experienced crews worked with limited-access drill rigs, as well as from ropes and climbing harnesses to complete the work safely. The crews installed SuperNails® and high-tension mesh for more than 40,000 square feet through very difficult conditions and weather.
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.