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Recent content by jimzhang

  1. jimzhang

    testing on vibration transmission

    Thanks for the replies. It is targeted to transmit the vibration in a 15' radium range, and the depth is also 15'. We are trying to design a vibrate rod with 0.25 inch amplitude and low frequency (<25). Not sure this works or not. Our purpose is not to densify the surrounding soil, but to...
  2. jimzhang

    vibration calculation

    How can I evalute the vibration transmission in soil, esp. loose soil? Thanks!
  3. jimzhang

    testing on vibration transmission

    Is there a proved field or lab equipment or test that can apply a rod in the soil (like a vibrating drilling) with certain amplitue and frequency? - I am trying to find the right way to transimit vibration waves in soil on large scale. Thanks!
  4. jimzhang

    bearing capacity on a larger area

    Unfornately, this is not a univ assignment. I have been doing the geotech analysis on a couple of landfills. It includes slope stability, bearing capacity, settlement, veneer stability, piping delfection, etc.....It is straightforward for all but bearing capacity and settlement to me. I sense...
  5. jimzhang

    bearing capacity on a larger area

    Thanks, and that is pretty good discussion. I thought about embankment too, however, it seems like an enlargened strip footing above ground level because it uses the parameter of embankment width to calc. To make my questions clear, I made a simple problem: Say, an area of 3000ftx3000ft site...
  6. jimzhang

    bearing capacity on a larger area

    I guess so. Bearing capacity theory only applied to footings in my opinion. As to landfill, I am wondering the Settlement calc. If a height of waste (surcharge) is applied, should I assume this load will induce the same stress (unit weight x waste height)in the sugrade (no matter how deep it...
  7. jimzhang

    bearing capacity on a larger area

    I recently ran into problems about calculating the bearing capacity in large areas like a landfill. The Terzaghi theory and all the others are based on footings on a small area (strip, square, etc). What is the appropriate way to calc the bearing capacity for a large area as a whole? Also...

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