Shear parameters

The shear parameters of a soil or rock are the following parameters for the shear resistance , i.e. for the resistance that a solid body opposes to a shear load or shear stress :

• the cohesion ${\displaystyle c}$
• the angle of friction or its tangent . ${\displaystyle \varphi }$ ${\displaystyle \tan \varphi }$

They belong to the geotechnical parameters of soil mechanics and rock mechanics . Both can be used in shear tests . B. measure with a triaxial device or frame shear device .

The shear parameters are used for geotechnical verifications in the subsoil of structures and also for natural slopes in both loose and solid rock :

• for verifications in earth statics
• for proof of stability in geotechnical engineering including tunnel construction
• for the verification of the slope failure safety
• for proof against ground failure

etc.

The shear parameters are also the most important parameters in the Mohr-Coulomb breakage condition and other breakage criteria .

Web links

BAW: The partial safety concept ..., slide 9, slide 25