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  1. geotis

    Factors of safety for shoring design.

    Consider shoring design basics as an example. Passive pressure is a resisting force to which we apply a factor of safety to obtain a lower allowable passive pressure for design. The active pressure is a driving force. Is a factor of safety applied to the active load to obtain a higher active...
  2. geotis

    seismic wall pressures

    I found a 2014 thread addressing this issue but it is now closed. OCGEO posted: For a recent design of a non-yielding (at-rest) wall..... For At-Rest Earth Pressure (level).... Ko = 1 - sin(phi) ---- Jaky, 1944 For At-Rest Seismic Earth Pressure.... Koe = 2*kh (where kh = 1/2 PGA-M) ----...
  3. geotis

    ASTM-AASHTO Test Methods Cross-Reference

    I have been unable to locate a listing that cross-references the ASTM designation to the AASHTO designation for equivalent test methods. Any suggestions? Thanks,
  4. geotis

    Seismic Lateral Earth Pressures

    Thanks Mike, Can you refer me to an example or describe the pressure distribution.
  5. geotis

    Seismic Lateral Earth Pressures

    I read in a previous post that the inverted triangle was standard procedure as of about 10 years ago or so to determine lateral seismic pressures. I this is true, then what is the current standard? Thanks,

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