Quote:
Originally Posted by boatman12
Not sure what's happening here They haven't removed any dirt from the site for awhile, but they're drilling a lot of horizontal holes into the side of the hill next to the kiss and ride.  |
That's to keep the wall of the hole from collapsing. They'll put long threaded rods in, spray the side of the wall with concrete, and then bolt a large plate onto the sprayed concrete.
The bolt squishes the concrete, which then gives the wall of the hole more strength than it'd normally have.