Water boundary condition is 2 type:

Fixed level boundary condition

water flow boundary condition

Dear Farzad

what are your recommendations?

It is depend on your situation. Both are the best.

You have two options to define water table in domain 1. Phreatic line 2. Steady state. I suggest you to see manual and liquifaction example to make sure which is most suitable.

I am talking about that one.

Thank You.

See, seepage/outflow are related to water head mostly in case of embankment dam, coffer dams its used. I do not think you need to use it for liquefaction, you need to define a water table location in your domain.

This paper has modelled a well know case history of Down-hole arrays at the Wildlife site using plaxis UBC sand model in plaxis,

https://waset.org/publications/9997544/prediction-of-soil-liquefaction-by-using-ubc3d-plm-model-in-plaxis

Thank you Mr. Sadiq

Ahmed Hussein Olat

Hello

I have the same problem. Did you solve this problem? How?