While good record keeping is generally important, I draw a line at this one. Like most engineers, I generally don't keep written records on these type of things.
The amount of dead men I needed for anchorage on my last suspension bridge would put me away from the next millennium.
Satoshi,
It seems that your method for design is to start new threads as you proceed. I suggest that you provide answers to some of the questions in the previous threads.
Just design it like a typical foundation. Depends what the soil is, but I would try to use rock anchors to take the load and a max of concrete to prevent corrosion. If you want to design it using the weight of the concrete alone, I would factor the load up by at least 1.5 so that the weight you have is 50% more then what you need.