You may be able to use mechanical means, such as small black binder clips, to hold the track sections together from underneath and keep them from coming apart. The chrome "handles" on the clips can be removed if they touch or get in the way of the electrical contacts and just leave the black "clip" part intact.
If you have a foam base, there should be no issue with the clip contacting the layout surface before the bottom of the track itself, as it can just be pushed down into the foam. If it's a hard surface with no give, just make sure you use the right size clip and it should be ok - I believe it's 3/4".
I use them on some sections of my Fastrack but can't take credit for it - tip from GRJ.
