Slope Stabilization with Rock Anchors and Slope Drains, Act 2 - Del Webb Community, Mt. Juliet, TN-Video

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Video Summary

The presentation described a second repair of a landslide behind high-value homes in the Nashville area. An earlier rock buttress had continued to move during wet weather, as groundwater weakened the fill and underlying clay-shale interface. A new team designed an anchored reaction-block system, adding horizontal and toe drainage, monitoring, and plans to restore the homeowners’ yards.<br /><br />A key lesson was to analyze construction-stage risks, not just the completed design. Modeling reduced soil strength around anchor drilling showed the factor of safety could fall from 1.7 to 1.2, helping the team plan safe drilling. The contractor also proposed constructability changes, including wider temporary access and individual concrete reaction blocks.<br /><br />Thirty-seven anchors were installed and tested; several required replacement or extension due to weaker rock. Load cells provide ongoing monitoring. The speaker emphasized teamwork, careful field logging, flexibility, and anticipating groundwater and construction conditions to avoid repeating a failed repair.

Keywords

landslide repair

anchored reaction-block system

groundwater drainage

anchor drilling risk

slope stability modeling

construction monitoring