Inclinometer Casing

[Jonnypaul89]

Hi All,

I am having trouble with some erroneous readings from two boreholes that are fitted with inclinometers. The Inclinometer probe skips out of the tracks when I reel it up to the top of the casing.
I expect that the problem relates to poor installation. My inital thought is that the casing that the contractor has used is not adequate/ the grooves are not deep enough.
I know that the readings I am getting are incorrect because other older inclinometers that are installed at the site are not showing excessive movement.

Can anyone recommend tried and tested inclinometer tubing that will hold the probe within its tracks?

Thanks in advance

 

[GeoPaveTraffic]

Could be any number of issues. Would need much more data about the type of probe, casing, length, spiral, etc. to be able to have any useful opinion. Did you have someone present when the casing was installed?

Mike Lambert

 

[IRstuff]

ARe these other inclinometers working in the same casing that this one is not?

TTFN
I can do absolutely anything. I'm an expert!
faq731-376 forum1529

 

[Jonnypaul89]

Thank you for your responses.

The boreholes were sunk to 20mbgl. The probe is a Biaxial Inclinometer System, supplied by Soil Instruments.
Yes one of our engineers was present while the boreholes were drilled. 70mm diameter GAGE Technique inclinometer casing was used.

It is very difficult to identify a potential cause. The reason I expect the casing may be at fault is because the same contractor has let us down at another site by installing faulty inclinometers. Which may point towards the type of casing being the problem.

Thanks

 

[IRstuff]

I still can't tell whether you've tried this inclinometer on a working installation, or an inclinometer on a working installation on this casing. You can't "identify" a cause without data. You need to positively show that it's the casing or the inclinometer probe. that's the root cause

TTFN
I can do absolutely anything. I'm an expert!
faq731-376 forum1529