Building A Wooden Retaining Wall Is It Ok To Build A Retaining Wall And Then Back Fill It After?

Is it ok to build a retaining wall and then back fill it after? - building a wooden retaining wall

We add a second level on the ground floor of our house. The soil dug under the house has to go somewhere, we thought of a retaining wall built of wood and then when the machines go home and could liftthe reconstitution of space to dig, as they move. The area is large - 6 'vertical x 40' more x 20 "wide ... more or less.

Will it work? And if so, how you can recharge the drainage pipes and gravel in mourning, if they work?

All ideas and thoughts are welcome alternative!
Thank you in advance for any reply.