tensegrity for flying shoring?

I'm trying to work out the structural solution to a university project (in architecture). Basically, I require flying shoring between walls of a very very large trench (14m deep ~10m across, about 80m long). The problem is that the walls of the trench are non-parallel in plan, and undulate along the length of the trench. Firstly am I right to assume that flying shoring needs to be exactly perpendicular to the wall of the excavation? If so, then could tensegrity structure be used to ensure perpendicular compression members to all walls and tension cables connecting all the loose ends? If not then what? Pinning back into the soil unfortunately is not an option for archaeological reasons. Any precedents I could look at for permanent / semi-permanent flying shoring?
Any help would be appreciated, thanks in advance!!