Just now started buried piping analysis. little bite confuse.

I model all line which are buried and went to underground pipe modeler input, where i have inserted all parameters like axial, lateral, upward downward, up, down loads and stiffness, as well as friction coefficient, soil density, buried depth, angle,
yield displacement factor, overburden compaction. Then i run converted all model.

My question is do i need to give any restrain in piping model?

How we normal pass this information.