pipeline soil interaction 2

[billsumner]

Has anyone got general formulae for axial/uplift movement of pipelines in soil? Preferably referring to a code.

For example, what friction is developed between a pipeline with a known depth of cover and a granular or cohesive soil with known values of friction and cohesion?

 

[CarlB]

The document at the below site has some design procedures & friction data.

http://www.americanlifelinesalliance.org/pdf/buried_pipe3.pdf

 

[billsumner]

Thanks Carl for your help,

I have found that one - though it does have a few typos, making me unsure.

I also found PRCI/AGA paper Pipeline freespan design Volume 1 Design guideline (Project PR-170-9522) of April 1997, which gives axial resistance.

I am still looking for the lateral resistance of a submarine pipeline with a pile of rockdump holding it.

 

[DrillerNic]

I don't think the B31.4 or B31.8 codes cover this type of thing. A google on "Upheaval buckling" produced a number of hits including a several papers by Andrew Palmer, who I know has done a lot of work on upheaval buckling and subsea pipeline/ soil interations and a paper entitled "Monotonic and cyclic soil responses to upheaval buckling in offshore buried pipelines" by a Alex Baumgard of Cambridge University Geotechnical Engineering Group, which might answer some of your questions.

 

[cjandu]

Try NEN3650 for the derviation of soil restraint

 

[DrAlexBaumgard]

Bill,

If you are still looking for details regarding uplift resistance and pipe-soil interaction using rockdump, the research I conducted as part of my doctoral thesis may be useful, as I tested this material amongst others. As mentioned above, the title was "Monotonic and cyclic soil responses to upheaval buckling in offshore buried pipelines", and an abstract can be found online at:

http://www-civ.eng.cam.ac.uk/geotech_new/publications/abstracts/abst-baumgard.htm

This thesis can be obtained with some difficulty from the Cambridge University library in hardcopy, or alternatively get in touch with me from my company's website at:

http://www.bgcengineering.ca,

and we can work out an arrangement for a CD-Rom copy to be made.

Regards,

Alex