There are various track, signal, traction current diagrams used by staff. These aren't available on line though. Sorry, I can't point you anywhere! However, have a look here: www.anorakheaven.com/photo.htm This site contains images of signalling diagrams which show on some of the lines, what goes where.
The only thing I can suggest is the green Quail Map. I don't how old the info is, but it shows ALL tube lines, (including non-passenger lines and layouts in depots), the DLR and the W&C. I'm not aware of anything on the web.