Advice for penetrating New England dirt needed

rfc · 2016-10-23T23:03:00Z

I'm "hardening up" my control network, before winter sets in. Currently I've got 12" spikes (with a dimple turned in a lathe) at most stations. I want to pull them up and replace with two or three feet of 1/2" rebar with caps. Not more than two stations into the process, I hit something hard...very hard...not unusual around here. So the question is, if you don't know how big the thing is you're hitting a foot or more deep, would it be easier to excavate the spot, place the rebar and back fill, or just rent a battery powered hammer drill, and punch through whatever is there? I'm leaning towards the latter, if for no other reason that it would hold the position with tighter tolerances. Not to mention that if it IS big, digging's not going to help. Ideas welcome.

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Last Post by Mike Lacey 9 years ago

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Mike Lacey

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Why don't you just leave them, and put reference ties, nails in nearby trees, or corners of structures, and measure from the ties to the control points with a steel tape. This way if you find the control points move, you can always reset them from the reference ties, and nearby control points. Just make sure the reference ties are set so you have a good solid intersection point at the control point, and measure level.

Posted : February 7, 2017 5:55 am

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Advice for penetrating New England dirt needed

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