Soil nailing is an effective stabilizing method for slopes and excavations and has beenwidely used worldwide. It is a reinforcing method using the shear strength of in-situground and the pull-out resistance of soil nailing. Research on numerical schemes ofsoil-nailing retaining structures has been quite intensive in the past three decades.‘Plaxis’ finite-element modelling software is very commonly used for numericalsimulations. There are difficulties associated with accurately modelling behaviours of thesestructures in both cohesive and cohesionless soils. Hence, in the present study, thesignificant influence of the shear strength of soil-nail cut and of the amount of surchargeon the structural behaviour of soil-nailing retaining walls is discussed. The results showthat the soil’s physical properties and surcharge directly influence the soil-nailingstructures. Another important conclusion is that a soil-nailing structure consisting of nailsand tiebacks can be considered a good alternative to improve the safety of excavation wallsdue to its satisfactory behaviour in the numerical simulations.