I'm trying to design the foundation/anchorage for pipe bollards under pretty high loads. I'm designing for a 5500# truck at 45 mph (per aviation specs) and an allowance of 30 degree give on the bollard. Assuming crumpling of the truck, I'm looking at a 95,000# horizontal load at 18" above the sidewalk. When I analyze the foundation system, I'm coming up with gigantic footings which will not work on the site. If I look at adding piles, the depth required for the piles is insane. Can anyone offer a little guidance? Is there something I can do to reduce the load? Is there some other method of analysis that will simplify the foundation system?
I also have some bollard that will require a shallow foundation due to underground utilities. These will have a "sled" system that I'm also struggling with. Same loading.
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