05-03-2013, 05:10 AM
I tried digging a gate post hole at my place in Eden Roc. I hit solid lava and could not go any further with a steel o'o or a hammer drill. It finally has struck me that the solid pahoehoe is the worlds largest block of cement. Not that I have done this yet but when I get back around to that task I plan to use my little hammer drill to drill a few 3/4" holes a foot or so into the rock, then cement or glue 1/2" rebar into the holes. I will make a form around the vertical rebar above ground perhaps using a sonotube and pour the above ground part of the post. A friend did this except he just dug as far down as he could but did not embed the rebar. He bent the rebar out to make a wide base. His gate posts are still working. Mine will be even better for being embeded into the solid rock.