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  1. KeithGray

    Lateral Earth Pressure

    Thank you all for your help giving me perspective on this issue.
  2. KeithGray

    Lateral Earth Pressure

    Panars, What I've been told about Coulomb and long heeled walls is that there is a wedge of soil that doesn't move, that sits on the heel. It is triangular shaped, and mimics a back batter on the stem. My understanding is that the Coulomb active force is applied to that triangular wedge...
  3. KeithGray

    Lateral Earth Pressure

    BigH, The reference I have is Principles of Foundation Engineering, Fourth Edition by Braja M. Das. It's on page 391 and it shows a gravity wall with a short heel. When it shows it being analysed with Rankine, it shows the weight of soil above the heel contributing. When it shows Coulomb it...
  4. KeithGray

    Lateral Earth Pressure

    Thanks for the replies. I'd like to clarify one point in the question that doesn't seem to be addressed in any references. If there is a wedge of soil above the heel that doesn't move and the Coulomb Pressure acts on that wedge, does the friction force that develops between the soil and soil...
  5. KeithGray

    Lateral Earth Pressure

    I am a bridge designer and have always designed long heeled retaining walls with either at-rest or Rankine Active lateral earth pressure theory. I have always learned that Coulomb lateral earth pressure was for short heeled walls and that the vertical soil pressure could not be used in the...

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