Options for surveying large concrete structures?
Options for surveying large concrete structures?
(OP)
On an outdoor 100ft long concrete foundation supporting large machinery, what options are available to determine variation in the top surface in addition to traditional surveying (total station, pole, etc.)? I have a structure that was built about 6 years ago that recently has started to form puddles on the top surface after rainstorms. I’d like to determine the variation in the top surface and measure it periodically to determine if it’s getting worse (possible excessive creep).






RE: Options for surveying large concrete structures?
RE: Options for surveying large concrete structures?
Most construction materials testing/geotech engineering companies should be able to do these.
I've only seen it used on slabs and I don't think it's applicable to your issue.
If it's a strip footing couldn't you just set a benchmark and get a vertical point every 5 feet or so?
If you're worried about differential settlement you may not even need a permanent benchmark.
RE: Options for surveying large concrete structures?
RE: Options for surveying large concrete structures?
Don't use a construction laser "level" . The accuracy usually is too crude for what you need. What's wrong with a traditional transit-level? Remember they can be off also, if not in adjustment. Verify that with the two peg method. Of course you know what I mean? Right?
RE: Options for surveying large concrete structures?
I've seen some literature that says they are accurate & repeatble to 1/8" or less.
If floor area is congested, may be simpler to use this than surveys relying on line of sight.
You'd want a datum point in the building that isn't moving, as a reference for successive surveys.
RE: Options for surveying large concrete structures?
a 10 foot straight edge might also be useful, they are commonly used for checking pavement flatness
RE: Options for surveying large concrete structures?