Here's the slip form. The rebar is in place and the forms are lined with plastic for a smooth finish. This is the threshold, and the rough opening for the steel door is 34" wide so I have a 34" board holding things in place. The continuous pour extends well past the doorway to prevent water leakage. You can see the stub end of a carriage bolt stuck through the form----those will be set in concrete and give me something to secure the doorframe with later. Here's a better picture from the other side---
So now you're looking inside the form just pre-pour. That bolt will be well embedded in the concrete. I'll put one every 24".
Here's a yard of concrete, mixed in my mixer, wheelbarrowed over, and dumped in the form one shovel at a time--along with much tamping and vibrating the form in the hopes of having no voids or honeycombing. The plastic lining really helps the concrete slide into place. It'll also make stripping the form easier.
The first pour is the easiest. The next one I'll have to lift the shovel up higher---doesn't sound like a big deal, but it makes a difference. Then the next pour gets more complex with the forming because I will be past the outer soil form and have to build an outer wooden one and support it; but, I'll be able to pour from above which will make things easier.