Acta Polytechnica Hungarica Vol. 18, No. 4, 2021 – 213 – Three-Dimensional Modeling and Analysis of Mechanized Excavation for Tunnel Boring Machines Danial Mohammadzadeh S. 1,2,3,4 , Nader Karballaeezadeh 5 , Amirhossein Sanaei Zahed 4,6 , Amir Mosavi 7* , Felde Imre 7 1 Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, University street 1, P.O. BOX 9177948974, Iran danial.mohammadzadehshadmehri@mail.um.ac.ir 2 Department of Civil Engineering, Mashhad Branch, Islamic Azad University, Mashhad, University street 1, P.O. BOX 9187147578, Iran 3 Department of Civil Engineering, Faculty of Montazeri, Khorasan Razavi Branch, Technical and Vocational University (TVU), Mashhad, University street 1, P.O. BOX 9176994594, Iran 4 Department of Elite Relations with Industries, Khorasan Construction Engineering Organization, Mashhad, University street 1, P.O. BOX 9185816744, Iran 5 Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, University blvd. 1, P.O. BOX 3619995161, Iran N.karballaeezadeh@shahroodut.ac.ir 6 Toos Institite of Higher Education, Khorasan Razavi, Mashhad, University street 1, P.O. BOX 9188911111, Iran, Ah.sanaei@toos.ac.ir 7 John von Neumann Faculty of Informatics, Óbuda University, Bécsi út 96/b, H- 1034 Budapest, Hungary, felde@uni-obuda.hu, amir.mosavi@nik.uni-obuda.hu Abstract: Urban train infrastructures are very important for reliable urban mobility. This paper proposes a three-dimensional modeling of mechanized drilling corridors. Drilling in urban areas is always a risky and complex project. One of the most important issues during the construction of subway tunnels is the investigation of the impact of drilling steps on the ground subsidence and impact on existing structures. For this purpose, different types of mechanized drilling methods are often used, resulting in a considerable reduction in the displacements caused by tunnel drilling. In this study, part of the route of an urban train tunnel, that passes under a traffic interchange, is examined. The shear strength capacity of the slab pile was calculated, using the relevant equations, and then, the modeling of the soil mass was performed, using the PLAXIS 3D finite element program. The proposed depth of the tunnel construction, by the consulting company, is 18 meters. Due to drilling problems,