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  1. usuallycivil

    Drilling Post-tensioned slabs - liability

    Thanks to everyone for your comments.
  2. usuallycivil

    Drilling Post-tensioned slabs - liability

    We are a small general civil & structural design firm. We frequently receive requests to design minor modifications to all sorts of building types. We have typically shied away from jobs that involve any type of work on PT slabs. The thought being, that if some mishap should occur if a tendon...
  3. usuallycivil

    Checking sheet pile for quick condition

    Finally, oldestguy, after reading your last post, a light went on and now I realize what was the mental block that prevented me from "getting it". I understood calculating the critical gradient and applying a FS, but I did not understand how to calculate the actual gradient. Designing storm...
  4. usuallycivil

    Checking sheet pile for quick condition

    Thanks for your input... but what I really need is something much more specific... short of drawing a flownet, is there a formula I can use? How to calculate the head loss per foot of flow? And what about the USS formula I mentioned, is anyone familiar with it? Thanks in advance.
  5. usuallycivil

    Checking sheet pile for quick condition

    I am just completing a sheet pile design for shoring an excavation. I am quite satisfied with the design, except for analyzing the potential for a quick condition at the toe. In practical terms I have dealt with the issue by requiring dewatering to a depth that I am comfortable will prevent...

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