I have read through the threads on here about remote foundations and wanted some more feedback on my project which will be moving forward pretty quickly. I have land in the Talkeetna area. The soil is sandy gravel with no rock in sight. I will be building a 20x20 one level 3 sided log cabin. I have heard from people in the area that the soil will heave. It seems I could dig below frost level and use sonotubes, but I have heard that even those will jack especially in an unheated building.
My thought is to remove the organics and get to the undisturbed soil and pour some 2'x2'x8'' concrete pads and then build some metal posts that I put on the concrete pads which can be adjusted. I would use steel I beams on top of the posts and then conventional construction from there on up. I figured the building may move but I can adjust pretty easily to deal with the movement. Will putting some foam insulation underneath the pads help prevent the movement. Also, I have been told that if I want to use the system I described above, I would be better using the pressure treated wood instead of the concrete because the frost grabs the concrete and will not grab the pressure treated wood.
Any thoughts. I don't mind hauling in 50-60 bags of sacrete to pour pads but hauling in enough concrete to go below the frost line is too big a project.