check out the Jean-Pierre Houdin keyword for much more, or click the pic, or this link..
Cutaway view of Jean-Pierre Houdin's "Noble Circuit" chambers and corridors, plausible but yet to be proven. The cutaway also shows the spiral ramp in cross-section in two places.
Khufu's Secret Rooms
Jean-Pierre Houdin
Check out the videos linked from each of these graphics.
Lexxtex -- the Hidden Secret of the Great Pyramid's Construction Uncovered
The Great Pyramid Mystery Solved - National Geographic
Khufu Reborn - Dassault Systemes