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U.S. Army Corps of Engineers
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US Army Corps of EngineersInstitute for Water Resources, Risk Management Center
Risk Calculations Suite

Concrete Lined Spillway Erosion (Slab Jacking)

Concrete Lined Spillway Erosion (Slab Jacking) event tree
NOTE

  • If the slab fails due to uplift and stagnation pressure is not required to expose the underlying foundation, Node 2 on the "yes" branch of Node 1 can be assigned a probability of 1.0 or removed from the performance event tree.

  • Node 2 can be expanded into several branches to account for differing gap widths and offset heights.

  • Nodes 5 through 7 can be expanded to account for differing amounts of passive wedge removal (Node 5), evaluation of the PFM even if scour does not progress beneath the monolith(s) (Node 6), or differing scour widths (Node 7).

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