Useful links:

• Hardening soil model, Part 1: Primary Deviatoric (Shear) Loading:

https://youtu.be/IakDT7aJPFA

• Hardening soil model, Part 2: Primary Compression Loading:

https://youtu.be/-QKCjSwgVDE

• Hardening soil model, Part 3: Unloading / Reloading:

https://youtu.be/T08jY4WJG9U

• Importance of Rinter factor in analysis of retaining walls. Recommended values of Rinter:

https://youtu.be/FT9vo7l2D-g