Abstract: In order to study the influence of the settlement of the soil layers induced by the upper part of the filled soil in a double-row steel sheet pile cofferdam, to study the influence of the additional loads from the deformation on the  axial force of the steel tie rods, and to improve the design theory of steel tie rods, the deformation and axial force of the steel tie rods during construction and operation are evaluated by the finite element method in this paper. The results show that the weight of the filled soil above the steel tie rods and the vertical load on the surface of the filled soil will cause a significant downward bending deformation, which increases the axial force of the steel tie rods by about 20% to 35%. Based on the results, the formula of the steel tie rods could be optimized and the tie rod bending coefficient is proposed.

Key words: Steel Cofferdam, Bending Coefficient, Finite Element Method, Steel Tie Rod