EVENT DETAIL

In June 2013, historic rains (approx. 9 inches) infiltrated highway construction associated with a 45 ft high MSE wall construction of I-95 Northbound near Whitemarsh MD. Temporary Support of Excavation (SOE) showed signs of distress and the I-95 highway showed signs of instability (tension cracks and lateral movements) and moving as part of a deep-seated landslide. This presentation will address the initial evaluation, instrumentation, temporary stabilization and permanent stabilization of the landslide. Temporary measures were implemented to reduce the rate of ground movement involving a stone buttress at the face of the SOE wall. The permanent stabilization measure was constructed as part of the final retaining wall construction and consisted of a system of 6-foot diameter concrete caissons that were 60 feet long along the deep slide area.