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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

    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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