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  1. MPETER

    Large circular opening in large circular shaft

    yes I agree on the hoop stress definition- tension not compression. Issue is the engineer of records fixation on hoop tension developed by fluid surcharge from the interior of the structure (and for a buried structure??) Good input on treating the remaining shaft walls of the swiss-cheesed...
  2. MPETER

    Large circular opening in large circular shaft

    Good input. I reread my question, failed to mention the 4 foot diameter penetration is for a pipe that runs through the base of the 10 diameter foot shaft , in other words there are 2 ea 4 foot penetrations ( one at 12 o'clock and one at 6 o'clock) all down at 30' deep To add to the issue...
  3. MPETER

    Large circular opening in large circular shaft

    I'm building a 30 foot tall 10 foot diameter reinforced concrete shaft structure. How do I allow for a 4 foot diameter penetration for a sewer pipe into the structure. What sort of reinforcing approaches can I use. The concern is primarily the hoop stress not being transmitted through the...

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