CE 540 Mod 2-5 Compaction Induced EP

Class presentation on lateral earth pressure induced by compaction against non-moving walls

[rickyjiang]

Thank you very much for uploading your lectures for earth retaining related topics, it has helped me tremendously in terms of understanding them and applying them for my projects

[rafaelcamposgarcia]

Could anyone help me understand why after the first unloading both z and x stresses have reached Kp? I understand is the maximum earth pressure before the failure happens, but as far as I can see, when unloading it doesn't need to reach that limit. Does it?