Okay -- 2-1/2 days of honest work and I'm ready to sleep for a week. /w3tcompact/icons/tongue.gif
Considering I don't know what I'm doing, the project seems to be coming right along. The one strategic error I may have made was in using 10-foot pipes. I figured, it's a 5-foot wide tractor so 10 feet is plenty. Then, when it was too late, I read that the backfill should be sloped inward from the bottom so that the top of the fill is about 2-1/2 feet in from the ends of the pipe. Let's see -- 10 feet minus 2.5 times 2 = ...
5 feet!!!/w3tcompact/icons/shocked.gif
YIKES!!!
I decided to modify that plan by shoring up
both ends with sandbags to act as a retaining wall. In fact, I filled the bags not with sand, but with ready-mix concrete. When the rains come they should turn quite solid in a matter of hours. No steel, of course, but better than nothing?
Anyway, I had a great time
toting pipes and
working a pile of crushed limestone. The not-so-fun parts were filling the sandbags by myself (so I made kind of a
funnel/chute jig) and
tamping down the layers of backfill. From what I've read, the proper way to support metal pipe is to spread thin layers (couple of inches) of a good compactable fill material, like crushed limestone, on both sides of the pipe and thoroughly compact it by heavy tamping. I used a 20-lb steel cylinder with a piece of pipe stuck in the middle of it. Something my dad apparently used to crush beer cans for recycling.
The best part came when the pipe was covered enough that I could use the tractor to do the compacting. I pushed the flat of the bucket down on the surface hard enough to lift the front wheels, and then slowly backed over the layer of fill. My wife saw me ham it up for the camera on this one and dared me to post it on this board.
So much for my self-respect.
Once covered with fill, I added a layer of topsoil to help build up the coverage. 12 inches is the recommended cover depth but I currently only have about 8. It seems to be supporting the tractor just fine, but I intend to come back and build it up some more once the other culverts are also in place. In the meantime, I have a
usable creek-crossing. /w3tcompact/icons/smile.gif
If you have lots of time or a fast connection, there are
more pictures in my scrapbook.