Water tank ring foundation partial removal
Water tank ring foundation partial removal
(OP)
I been asked if for the repair of a pipe portion of a nozzle close to bottom/base of tank wall on a large condensate tank(72'-7" dia.), they can remove part of foundation ring to cut out a discharge flange?
Tank is empty.
Don't know what to tell them?
Tank is empty.
Don't know what to tell them?






RE: Water tank ring foundation partial removal
Good chance the foundation is designed for hoop stresses, which cutting away a portion of would compromise.
Brian C Potter, PE
Simple Supports - Back at it again with the engineering blog.
RE: Water tank ring foundation partial removal
Most commonly, tank ringwalls are poured as one pour, no joints. However, it is not uncommon for them to be poured in quadrants or otherwise segmented with construction joints, and a few engineers insist on them being built that way. As Brian notes, primary loading is hoop stress. If you can remove a section and manage to tie back in to the existing hoop steel, you should be able to match original design. It would simplify things if there were no lap splices in that vicinity.
If the existing pipe is concrete-encased, it may be easier to abandon it in place and put a new underground pipe to one side of it.
Also consider abandoning the underground pipe and adding a shell nozzle (and insulation if required).
RE: Water tank ring foundation partial removal
If that is case, you could cast concrete under nozzle for continuity of ring wall.