Up till now, several excavation retaining systems has been developed and some of them are more common. These methods include soldier beam and lagging, sheet piling, bored pile wall, diaphragm wall, steel truss, strut and soil nailing, that eachone has its own advantages and limitations. Most of the researches have considered traditional excavation retaining methods separately and less attention is dedicated to the combination of them. Ground anchors on some systems like diaphragm wall and soldier pile and lagging system, are considered as an auxiliary agent and they have been used for optimization of moment distribution. In nailing-anchorage combined system, which has been contemplated recently, alternative arrangement of nails and anchores in vertical direction considered and because of the simplicity of the 2D analysis, combination of nail and anchor in horizontal and vertical direction in 3D situation are neglected. Because of similarity of nail and anchor, maximum lateral wall movement parameter can be decreased by a small change in material, by applying anchors with nails in different arrangements, which is one point of view in this dissertation. One of the disadvantages of soil nailing system is excessive settlement in adjacent of excavation. New proposed pile-nailing system has solved this problem partially and can be considered in removing limitation of nails in collision with urban utilities. In this dissertation, finite difference method with FLAC 3D software has been used for considering behavior of these systems. Some analysis has been carried out in excavations with 20m depth and 60kPa surcharge in the adjacent ground to excavation and concluded that with new arrangement in combined nailing-anchorage system, lateral wall movement decreased for 14%. Also piles in combined pile-nailing system, maximum ground settlement in adjacent ground to excavation decreased for 25.8%. In parametric research that has been done in this dissertation, maximum optimum length for nails attained 0.8 of excavation depth and maximum length piles embedment 0.75 of excavation depth and concluded that increasing length of nails and piles embedment more than this values, don't have effect in settlement reduction. Keywords: Excavation, Soil nailed wall, Anchorage system, Bored pile wall, Limitations, combined systems, FLAC 3D software