FOUNDATION DESIGN FOR TANK FARMS
FOUNDATION DESIGN FOR TANK FARMS
(OP)
A client wishes to construct a tank farm (ten 80-ft diameter tanks) on silty sands. The fine sands (medium dense) extend all the way down to 60 feet from ground surface. The client wants to place the tanks directly on the sands without footings. Does anyone have any experience doing this? Especially, when an impermeable layer has to be placed below the tanks as per SPCC regulations.





RE: FOUNDATION DESIGN FOR TANK FARMS
Read up on API 650, especially appendix B.4
The impermiable layer can be worked into either case, althought the ringwall makes it much more straight forward.
RE: FOUNDATION DESIGN FOR TANK FARMS
RE: FOUNDATION DESIGN FOR TANK FARMS
RE: FOUNDATION DESIGN FOR TANK FARMS
RE: FOUNDATION DESIGN FOR TANK FARMS
RE: FOUNDATION DESIGN FOR TANK FARMS
For containment - you will probably go with a geomembrane buried a few feet below the site grade - your sand on top. Similarly, the bunds will be of sand with the geomembrane taken up the sides - need to think through the detail of 'holding' the geomembrane at the top -how to turn down to ensure it does slide back on you. Rememeber to have a system to drain the bund if you get a rupture - you'll have to collect the spilled liquids. Remember to post no-smoking signs everywhere. etc.
RE: FOUNDATION DESIGN FOR TANK FARMS
If you're on the Gulf coast, you will want a tank ring in case of a hurricane and the associated surge tide. Not to mention the 130+ mph (209+ kph) winds. I know, I know - we haven't had any tanks undermined in over 30 years. Hmmm, we haven't had a major hurricane in Texas in over 30 years, either!
We are long overdue...
Please see FAQ731-376 for great suggestions on how to make the best use of Eng-Tips Fora. See FAQ158-922 for recommendations regarding the question, "How Do You Evaluate Fill Settlement Beneath Structures?"
RE: FOUNDATION DESIGN FOR TANK FARMS
RE: FOUNDATION DESIGN FOR TANK FARMS
I'm not THE FOCHT from McClelland Engineers - but I know him awfully well...
Please see FAQ731-376 for great suggestions on how to make the best use of Eng-Tips Fora. See FAQ158-922 for recommendations regarding the question, "How Do You Evaluate Fill Settlement Beneath Structures?"