ABSTRACT
The need for deeper urban excavations has imposed to geotechnical engineers the challenge of balancing high horizontal forces with occurrence of minimum displacements in soil as well as in the structures nearby. In many cases, a tied-back earth retaining wall is the recommended technical solution. The use of ground anchorage, as a direct extension of the rock anchoring technique, is intensely executed throughout the world. This work aims to evaluate a hydromechanical geotechnical problem solving the coupling between soil mass and water in the tied-back wall system. The safety factor of the tied-back wall and the displacement field generated by the construction of the retaining wall system are analyzed through the finite element method. The saturated cohesive soil is modeled by the Mohr-Coulomb constitutive law and effects due to variations of width and depth of the wall, anchors inclination and bulbs stiffness are also considered within a parametric study.
