How Do I calculate shear key resistance for dam stability analysis?

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Werner Bilfinger

Take a look at EM_1100-2-2200 from USACE. In any case, shear keys transfer the failure surface to the deeper-seated elevations (at the base of the shear keys).

Suneel Matchala

In addition to Werner Bilfinger recommendations, you also can refer the following article, Application of Shear Keys to Improve the Slope Stability of Earth Dams on Weak Alluvial Foundations by Amirreza et al. DOI:

10.1061/9780784413388.067

Saeed Mojtabazadeh

Article Three-dimensional modelling of shear keys in concrete gravit...