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Lefranc and Lugeon correlations

Lefranc and Lugeon correlations

Lefranc and Lugeon correlations

(OP)
Hi,
I am searching for a correlation between the permeability values obtained by Lefranc and Lugeon field tests. In other words, the permeability of a rock in Lugeon unit is calculated (upon completion of a Lugeon test) and the corresponding permeability in Lefranc method (i.e. say in cm/sec) is needed.

Thanks
Cmorgh

RE: Lefranc and Lugeon correlations

I suggest you re-post this in Soil Testing Engineering, as it seems to get a lot more traffic than this forum, which seems to be a backwater.

DRG

RE: Lefranc and Lugeon correlations

(OP)
Hi and Thanks
Prior to posting in here, I had posted that in soil testing engrg.
Thanks for your comment

RE: Lefranc and Lugeon correlations

Doesn't Lugeon give you the permeability for rock while Lefranc is for soils (same number but diferent purposes, so no correlation needed)?  
The only concern would be rock is very dependent on fissures so you have a lot of concern on directionality and if your test hit a crack.

Probably misunderstood, but I am curious.
  

RE: Lefranc and Lugeon correlations

You might also try:

   Home > Forums > Civil / Environmental Engineers > Activities > Soil/Groundwater environmental engineering Forum

I didn't know it existed until today.

DRG

RE: Lefranc and Lugeon correlations

(OP)
Hi
To dgillette: Thanks for your care. I regret to say The forum in question seems to be no longer active.

To blueoak: You are right. Lugeon is expected to be performed in rock, whilst lefranc is expected to be performed in alluvium.
However, consider that the alluvial layer is grouted now (Lefranc being performed prior to grouting). The layer is now different from alluvium and mostly similar to rock (packer set up easily carried out after drilling). Hence, Lugeon is performed. Now, how to correlate these two results?

Regards
cmorgh

RE: Lefranc and Lugeon correlations

(OP)
Thanks so much cvg,
Done.
Regards
cmorgh

RE: Lefranc and Lugeon correlations

Hi,
I guess Rock Slope Engineering, 3rd edition by Hoek&Bray may help you.

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