Please see this article:

Article Seismic analysis of tall anchored sheet-pile walls

The notation for earth pressure at rest is 'Po', when the wall move away from the back fill, the active earth pressure mobilized on the wall is denoted by 'Pa' and when the wall move in to the back fill, the passive earth pressure is mobilized as denoted by 'Pp'. ok all the best in your research..

Dear Karthigeyan . S thanks for your kind response. well i am aware of theoritical earth pressure notations (po, pa, pp). i am confused the same notation in ABAQUS.

thanks

Dear Mohannad H. Al-Sherrawi thanks for the kind response and article. i will look into it.

thanks