The housing, traffic problems and protection against terrorist attacks in the congested areas all over the world, especially in Egypt necessitate the optimum usage of land. This may be partially achieved by constructing both tall buildings with multistory basements and multistory underground garages and underground shelters as well. One major problem that may be encountered during the construction of such kind of structures is the need for deep excavations. The objective of the present study is to address and analyze some of the problems associated with construction of deep excavations. The computer code ABAQUS13.0 is employed for the analysis using the nonlinear finite-element method. A threedimensional model is built taking into consideration both of the geometrical and material nonlinearity. In order to reduce the numerical problems, the relatively simple Drucker-Prager nonlinear soil model is adopted. A parametric study is carried out in order to determine the extents of the considered problem. The tension cracks are approximated using contact elements. Different kinds of side supports are used such as diaphragm walls with and without tieback anchors or struts and pile walls. The effect of soilstructure interaction is taken into consideration. The stress paths changes around the excavation are investigated. A comparison study between the effects of the different supporting techniques on the surrounding media is performed. The results of the present study are presented in tabulated and graphical form useful for practical purposes.