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- To: <seaint(--nospam--at)seaint.org>
- Subject: wood piles
- From: "David Handy" <dhandy(--nospam--at)trg.ca>
- Date: Thu, 17 Feb 2005 11:41:19 -0500
We have a local job
that has a 1930's school building being demolished prior to a new one being
built. The concrete foundations were placed on wood piles. We have seen
the tops of these piles rotting due to a water table level being just below the
tops of the pile. In some cases the wood is a "pile" of powder. With these
piles the top has rotted above the soil level with the part below top of soil
looking as good as new. I can't determine the species but appears to be some
type of softwood. The odd part though is that when the piles have been pulled
out and left sitting around they are slowly exploding?? It is not a matter of
them freezing. The only explanation thus far is that the piles are completely
saturated and were under triaxial stress. Now the confining pressure has been
removed they seem to be slowly expanding and exploding as if the tops have
been bashed with a sledge hammer. Has anyone seen this before and is this the
reason for this type of action?