Paper No. 3
Presentation Time: 2:10 PM
STABILIZATION OF A LARGE POTENTIAL WEDGE FAILURE ALONG INTERSTATE 40 IN WESTERN NORTH CAROLINA, OCTOBER 2009
In October 2009, a slide of approximately 50,000 yds3 blocked all four lanes of Interstate 40 at MM 2.5 in Western NC. Geologic mapping determined that the failure was a large wedge, with a remaining 310,000 yds3 of rock, perched at the edge of stability, to be removed or stabilized. This presentation will review the design and construction process required to stabilize the mass, including: design assumptions, peer review, utilization of SWEDGE software, survey work (DTM generation and LiDAR), construction under a 60-day contract for 47,000 linear feet of anchor installation, design changes during construction and the installation of a comprehensive monitoring system. The discussion will cover most geologic and engineering aspects of the mitigation.