Critical Velocities in Cohesive Soils

There are no definitive data available for determining critical velocities in cohesive soils. In an unpublished paper (Permissible Shear Stresses/Critical Velocities, 2005) Sterling Jones, Research Engineer, FHWA, has collected and commented on various methods available in the literature regarding this subject. The Office of Bridge Development has conducted limited tests of critical velocities in cohesive soils using the EFA Apparatus in the SHA Soils Lab. On the basis of this existing information, OBD recommends the following:

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