We can scale it to that sealed boulder she punched earlier based on the force of her punch being completely absorbed by Hiruko, meaning it should he as good as the wall since Sakura used full strength on both.I have no idea how durable Hiruko's shell is.
Also, Chiyo said Hiruko was unbreakable, despite explosive tags and her own kage being able to crush people completely using sand, so she scales Hiruko above their destructive ability.