huangyhg

oil storage tank foundations
any web sites/details for 100,000 gallon fuel tank foundations. i have seen a few around but did not design any. i need input and ideas for the first.
regards,
check out our whitepaper library.
lutfi...is this going to be a concrete tank or a steel tank? foundations are somewhat different. does the foundation have to be integral to the containment system?
ron, it is a steel tank. 100k fuel 27 foot diameter. it will be on quoqina (hard shell).
i imagine i will need a ring beam, center post footing, layer of sand under bottom of tank, sump, monitoring wells, and layer of compacted fill.
any step by step or reference would be appreciated.
ron,
the containment is separate from the foundation.
you may find a fair bit of information from area tank companies- check them out.
check out api-650 (and similar related api documents- see their website). it will set you back a couple of hundred bucks or more. but it does have info in one of the appendices on foundation design and leak-detection system. (don't get too hung up on their foundation design methodology, which is overkill for most tanks.) see structural engineering handbook for chapter on tanks and foundations. and check out aisi's hand books on tank and steel plate structure design.
if it hasn't been done, at some point, someone needs to check out nfpa-30 or the uniform fire code as they pertain to the tank, and local/state/ federal regulations pertinent to the tank (for example: containment issues, leak detection, venting, setback from property lines, emissions control, etc.)

lutfi...you are on target with your thoughts. as jstephen noted, api 650 is a good reference for this.
the ring wall is designed for confinement of the soil as a retaining wall, with loaded soil. high modulus material under the tank will reduce the load on the wall (shell base or re-compacted coquina works well).
there is a 3 page paper titled "oil storage tank foundations" by irving e. boberg. this paper was mentioned some time back in another thread as being from 1951, mr. boberg seems to have been the chief engineer at chicago bridge & iron at that time.
best wishes
steve - it's on the way.
lutfi - you must have changed your hotmail address. the email "bounced" back.
there has been much discussion about oil storage tanks in a number of threads. i have been involved with quite a few large diameter tanks and our company did almost all such tanks in sarnia refineries for years. basically, the tanks were steel shell and up to 150 ft. diameter. soil conditions ranged from firm (medium - for the non-canadians)to stiff clays, shales and sand. to my recollection, we never included any concrete ring foundations. at one refinery where shale was relatively close and overlain by a very stiff till with fill on top, we did put in a granular ringwall for the tank edge to sit on. but generally all tanks were founded on a tank-pad foundation of 1.5m thick topped with 75mm of crushings dust for sitting on the base plates. to my knowledge - we never had any problems with any of the tanks; even one large tank founded on soils with su values in the order of 750psf initial.
a relevant paper was by bjerrum on oil storage tank failure in norway - it was in london's issmfe conference 1957. anyway - just some case histories.

the paper "oil storage tank foundations" by irving e. boberg is now posted in .pdf format at
sliderule.. this is a great idea and service.
lutfi

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