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  1. adidasmayo

    skin friction of CIDH piles

    Everywhere I have read so far uses the beta method to calculate the skin friction. This provides a result such as 60H psf where H is the depth of pile. I have seen in some reports where the skin friction value is provided as 300 psf. How is this correlation made? Please help.
  2. adidasmayo

    Lateral Earth Pressures from a rock cut slope on a retaining wall

    Hi Henryzau, Thank you very much for your response. What about the little amount of granular backfill required behind the wall for drainage purposes?
  3. adidasmayo

    Lateral Earth Pressures from a rock cut slope on a retaining wall

    Thank you so much for your very prompt response bridgebuster. I have already purchased that paper and have reviewed it. What about for seismic conditions on restrained walls? Any idea there?
  4. adidasmayo

    Lateral Earth Pressures from a rock cut slope on a retaining wall

    Hi Everyone, I have a unique situation where I am building a house by cutting into a hillside for my building pad. The backside will be a near vertical cut in rock and there are two retaining walls that will be almost stacked on top of each other. See image. How do I determine the lateral...
  5. adidasmayo

    Water replacement method mold

    Any ideas on where I can find a 30" by 30" square mold to perform the water replacement density testing per ASTM D5030??
  6. adidasmayo

    Horizontal seismic loads

    Ok so the question is that when should we use the kh to lower the factor of safety and when can it be applied to increase the factor of safety? And what type of material should it be used on?
  7. adidasmayo

    Horizontal seismic loads

    Anyone?
  8. adidasmayo

    Horizontal seismic loads

    I think I got it. We use kh for a pseudo static analysis for short term stability and we don't use it for a long term analysis. Correct?
  9. adidasmayo

    Horizontal seismic loads

    My question is when do we use the horizontal seismic load for base shear in a slope stability problem and when do we not. I believe using it generally decreases your factor of safety. There is an option in SLOPE/W that asks whether I want to use it or not. Please respond asap!!
  10. adidasmayo

    Direct Shear Help

    Per ASTM 3080, it states that the displacement rate should be equal to df/tf where df is the estimated horizontal displacement at failure and tf is the total elapsed time to failure. The total elapsed time to failure, tf, is equal to 50t50 where t50 is the time required to acheive 50 percent...
  11. adidasmayo

    Constant Head Permeability Test

    No it definitely is not a flexible wall permeameter. And i dont have my inlet and outflow reverese either. It is basically the set up that you can see at the Humboldt website for constant head located at http://www.humboldtmfg.com/search.php?query=constant+head we have the same permeameter and...
  12. adidasmayo

    Constant Head Permeability Test

    ok now that weve got the setup and everything under way I have another question. While we are taking outflow measurements the head based of the monometers increases over time. We cant figure out why this is happening. Should we wait until the head is constant and then run the test or is this...
  13. adidasmayo

    How to get Shelby Sample into a 2.5 inch Direct Shear or Consolidation

    We are looking to try Shelby tube sampling for our firm, however I can only find 3 inch shelby tubes. All of our machines are for 2.5 inch CD samples. How do I get the 3 inch sample into the 2.5 inch machines without disturbing the sample? Or is there another place other than Humboldt that I can...
  14. adidasmayo

    Direct Shear

    Please see the attachment on what we do for a Direct Shearhttp://files.engineering.com/getfile.aspx?folder=dc51ef14-70c4-4102-b6f1-79bac97e98aa&file=Direct_Shear.pdf
  15. adidasmayo

    Direct Shear

    Does anyone know why I would get negative values for cohesion for a Direct Shear Test? I am pretty sure that this should not happen.
  16. adidasmayo

    Constant Head Permeability Test

    thanks a lot that makes perfect sense now.
  17. adidasmayo

    Constant Head Permeability Test

    We are trying to conduct the constant head permeability test in the lab. However, the head is not the same when a tube is connected to the outlet drain and the tube is raised or lowered. Now I have looked everywhere and I cant find where the tube outlet should be placed with respect to the...

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