Abstarct: The final cover of the excavated tunnels in the mechanized method consists of a variety of precast concrete parts called a segment. Segment structure design for all types of loads including soil load (stone), External Water Load, Seismic loads, The loads was built during the construction, etc., is performed. One of the main loads in the design of these segments is caused by the Thrust jacks of TBM, Which could be one of the factors causing damage to the segments. In drilling operations by mechanized tunnel drilling machine, the complete ring of the segment acts as a support for all or part of the propulsion force, this leads to the creation of tensile forces in the thickness of the segment. The purpose of this thesis is the experimental evaluation of a new idea in order to reduce the forces acting by the Thrust jack due to modifying the shape of the driving geometry. For this purpose, 12 large-scale specimens including six simple concrete specimens(three samples using the geometry of the Conventional plates of Thrust jacks and three samples using the proposed geometry in this study) and six samples of fiber concrete(three samples using the geometry of the Conventional plates of Thrust jacks and three samples using the proposed geometry in this study) were tested. Also, the compressive strength of cylindrical concrete in this study is mean 42 MPa. Results show the increase in the bearing capacity of the proposed geometry for loading plates is about 30 %.