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How would you as built a 7,100 foot long 54 inch pipeline?
party-chef replied 5 years, 8 months ago 13 Members · 25 Replies
- Posted by: gschrock
A SLAM/scanner cart could be a solution. As the hangars are already there the SLAM solution will have common point patterns to keep the OTF registration tight. I’ve used a handheld SLAM scanner on a 2200′ tunnel, but maybe 7100′ is a tall order to keep the registration tight (you have to include targets at either end to check the closure anyhow). Here is one model on a cart: www.navvis.com/m6
I have used the GeoSlam for about 5-10 projects and I have found it to be a huge waste of time for civil applications. It is no good for elevations and tight coordinates. You would have to georeference the whole thing anyways so why not just scan it with a survey grade scanner?
This may not be the best solution, but maybe you could reach out directly to these fine folks ( they are pretty smart ).
http://www.carlsonsw.com/products/laser-measurement-devices/c-als/
As far as the invert goes, the contractor has a good idea. See how the water flows. If good grade there won’t be but minimal ponding from humps or low spots. He still thinks the engineer is going to want an as built survey. I’d be fine if they cancelled us.
- Posted by: LRDay
I’d be fine if they cancelled us.
A-men, brother.
Maybe the engineer will sign off on selective local as-builts at areas with ponding only, if it is question of minimum slope only it seems like it could be done with hand tools if the puddles are stable.
Article in the recent POB about a pipeline as-built:
https://www.pobonline.com/articles/101421-pipeline-survey-meets-challenges-and-deadline
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