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  1. HB4775

    Earth Pressure for Deep Tunnel Shaft Design

    In Seattle, WA. My bad on the 2nd post.
  2. HB4775

    Earth Pressure for Deep Tunnel Shaft Design

    Thanks for the reply, Ginger. But if I use Rankine theory then the pressure would be huge at the 150 feet depth. I am trying to develop the earth pressure for design of the tunnel portal shaft shoring.
  3. HB4775

    Earth Pressure for Deep Tunnel Shaft Design

    Hi All, I was wondering if anyone has latest references/sources for earth presure for deep tunnel shaft design (more than 100 feet deep). Are people still using the Terzaghi/Peck method to come up with the pressure diagram (0.65*Ka*Gamma to certain depth and then go stright line down)? TIA...

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