2004-5 Pipe

2005 01 26 Headwall Forms Work, Headwall Poured

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Today there were really only two things that happened ..some more small riprap was put in place at the tail end of the new pipe. You've seen this all before and it did not take long, so no photos.

The second was the completion of the forms for the headwall structure. This took most of the day. The crew of 10 concrete workers showed up about 7:15 and were at it until 3:30, when the concrete truck arrived. Here's a long sequence of snaps of the forms going up.

The stream is still being diverted directly into the pipe and being pumped out of the bottom of the hole.

This is basically a 12 foot wide by 6 foot tall room that tapers to about 8 feet wide at the back. The concrete roof is about a foot thick.

There is a lot of metal in this structure.

And it has a nice little two foot tall wall at the front.

Concrete arrives. I was told that about 7.5 cubic yards of concrete went into this.

It was all poured from the top, and the long concrete vibrators were used to drive it down into the walls. Those things make a very loud buzzing hum and really make the concrete flow.

More more more ..

The forms probably took 10 people 12-14 hours to build, but then only 45 minutes to fill with concrete and finish.

And finishing ..

And more finishing ..

With a little brushwork so we don't fall off walking on the icy smooth headwall in the winter..

And finally all put to bed.

Perhaps tomorrow this gets stripped off and filled in. A yard drain has to be poured a couple of sections of pipe into the yard from this structure, and then some large rocks have to go into the stream in front of it, but basically that will be the end of the heavy work.

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