GARDINER — For more than 10 months, a group of volunteers has been working for one goal: to bring the Wall that Heals on the Gardiner Common. On Tuesday, the three-quarter size replica of the Vietnam Memorial arrives in central Maine and will be set up in the Gardiner Common, where organizers expect anywhere from 9,000 to 15,000 people from around the state to visit during the four days it will be standing, starting Thursday. “We have had tremendous outpouring from all the local businesses,” Billie Ellis said. Ellis has been working with a group of local volunteers and Christ Church in Gardiner to bring the Wall that Heals to Maine. “The planning part is pretty well done,” Hank McIntyre, one of the project coordinators said.