Abstract: The deep excavation with multiple horizontal struts has been numerically analyzed using beam theory on elastic soil foundations and considering the influence of the pilesoil displacement. The force in the supporting pile with the change of horizontal displacement is also discussed in the paper. The analysis simulates the different stages of the excavation based on the location and the installation of the struts. The horizontal displacement, rotational deformation and the shear force as well as bending moment along the supporting piles are obtained. It is concluded that the predicted results are close to the observed values and the proposed method can provide a reasonable values of the force and deformation in the supporting piles during various stages of the excavation.

Key words: Foundation Pits, Deep Excavations, Deformation of Supporting Structure, Horizontal Struts