The selection of excavation support for a construction pit is of utmost importance to ensure the safety of workers, adjacent structures and the environment during construction. Depending on the specific construction site conditions, geological substrate conditions, pit depth, and nearby infrastructure, choosing the appropriate method of excavation support can be crucial. When selecting the excavation support method, geotechnical characteristics of the soil, pit depth, environmental conditions, project requirements, legal and safety aspects, as well as economic feasibility, need to be taken into account. Typically, detailed analyses are conducted to determine the most suitable excavation support method for a given project. This thesis provides insight into several solutions for securing the excavation pit, for which numerical analysis based on the finite element method has been performed. The alternative solutions include steel sheet piles, pile walls and reinforced concrete diaphragm walls. Models were created for all alternative solutions using the PLAXIS 2D software, and analyses of stresses, deformations, and stability were conducted.