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Any Civil Engineers...
 

[Closed] Any Civil Engineers/Groundswork people in the house?

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Better still re-use it to export British products

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Posted : 27/03/2013 8:30 pm
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I do hope you've got more than a couple of days to get it done 😯


 
Posted : 27/03/2013 9:35 pm
 kevj
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With regard to the pipe-jacking option, look at [url= http://www.ukstt.org.uk ]UK Trenchless technology website[/url].

I had a cpd seminar from them last year. Although I have never used this myself, the application seems almost a perfect solution for this.


 
Posted : 28/03/2013 11:44 am
 iolo
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What will jacking achieve apart from more cost?


 
Posted : 28/03/2013 7:05 pm
 kevj
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What will jacking achieve apart from more cost?

I assume that the pipe needs to be removed as it is out of service and poses contamination issues if left in situ.

Digging a trench of that size and with consideration to the locality will cost and (as the op queries) will be problematic.

As a solution, pipe-jacking only requires a small trench at each end. You would then force a new pipe with a larger diameter around the existing pipe. You are then able to jack the contaminated pipe out, leaving the new, clean pipe in place. Grout everything up and backfill the excavations.

There are often situations where the solution may cost slightly more (I'm not saying this method will be more costly) but given the far safer working practices may be the better option.


 
Posted : 28/03/2013 7:40 pm
 iolo
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Why not seal the existing pipe up with grout. I cannot see the need to put in a new pipe when all you're doing is filling it full of grout. I agree that excavation is not necessary.


 
Posted : 28/03/2013 8:42 pm
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