Concrete footing question

/ Concrete footing question #41  
Hi guys, I'm doing a few projects outside and need some advice about repairing a bent cattle grid. I have a tubular cattle grid, split in half with 7 tubes on each side. What happened is - the Calor Gas driver drove his lorry over the center of the grid. This caused the pipes to bend down by about an inch, as they have no support there. One side of the grid is now a good inch off the concrete. He only went halfway so only the first section is bent. This looks and sounds terrible each time you drive over it.

I want to straighten the tubes out again. My idea was to put the grid upside down, put some weight on it and hit each tube with a sledgehammer. I'm not convinced this will work tbh so does anyone have any other suggestions?

I would rate the chances of it working cold as very low but if it could get the pipes hot enough it would probably work.
 

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