A few more pictures before shotcrete.
Sika Greenstreak Waterbar expansion joint.
I doubt there would be many pools on TFP would need to go to the trouble of installing an expansion joint, but I though I would document it anyway as someone might want to know hows its done sooner or later
End profile of the waterbar.

Center section is "blocked out" with ply so it leaves a void the full thickness of the pool sides/base such that each half of the pool is free to move independently of the other.
Im not worried about any movement as the whole pool bears on rock, but I am worried about shrinkage cracking as the concrete cures due to the overall length of the pool
Here you can see how I blocked out the rest of the joint and have it temporarily supported with the 3x6 lamintaed bearer.
My Mrs is pathetic when it comes to getting in a pool, unless its as hot as a spa, so I had to have very small steps going into the pool (just over 5" in height each), so rather than expect the shotcretor to try and cut of the steps and have them somewhat equal, I formed all the steps so all he has to do is fill each step and cut off the shotcrete to level.

You can also see the risers for the infloor cleaning in each step. I still need to adjust the final position of the risers as they are slightly of line and position at the moment.
Shotcrete is booked for this weekend, with the contractor I prefered to do the job.
Will be completed over two days as the pool is so large. The expansion joint also makes for an easy and convenient way of breaking up the pour.
The metal formwork you can see in the photo is a permanent form called bondeck. Its roll formed and acts as a bottom layer of reo (in tension). The reason Ive used it there is that the steps are all suspended above the lower floor beneath them and are some 10 feet off the ground