A large electrical power company responded to reports of a landslide from a local resident. A transmission tower that supports a 75kV electrical service from the nearby power plant was located within the limits of the landslide and the tower had begun to tilt. GeoStabilization International® was called to perform emergency slope stabilization services and arrest further movement of the structure. Our engineers were onsite within 24 hours of the initial call and had a crew on-site starting the remediation within 48 hours.
GeoStabilization International® designed and built a slope stabilization system consisting of: a 12-foot tall soil nailwall with shotcrete surface treatment at the main scarp location immediately down slope of the tower; a micropile and grade-beam system around the tower’s foundation to isolate further movement; and soil nails and high tension mesh in areas surrounding the tower to mitigate against shallow surface failures within the power company’s right-of-way. Groundwater from a natural spring was a major contributing factor to landslide movement; therefore horizontally drilled drains were employed throughout the site. In total the stabilization system required over 28,000 linear feet of soil nails and micropiles, over 100 horizontally drilled drains, 3,500 square feet of shotcrete surface treatment, and over 54,000 square feet of high-tensile mesh.
In the Mid-Atlantic Region of the United States a rockslide occurred that presented a variety of problems for the state’s Department of Transportation (DOT).