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.
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...