International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

In this paper, the problems in redesigning a new track layout of an existing railway station according to the reqirements in the TSI “Infrastructure” and Ordinance No. 55 are examined and analyzed in the case of maintaining mainline operation during construction. The paper has been compiled on the basis of experience in designing the track layout of 3 existing railway stations from the Bulgarian network, as well as experience working with the current regulations and interoperability reqirements of the railway systems in the EU. The necessities for making changes in vertical and horizontal track alignment and switch layout are considered in opposition to the technolog ical, electrical and gauge limitations when carrying out construction works without the complete disruption of railway traffic. The conclusions of the report are formulated as guidelines for good practices when redesigning an existing layout – the practices that fully satisfy the imperative norms and balances between contradictory  equirements.

From 2013 to 2015, an “Instrument for the preparation of railway projects on the trans-European transport network” is implemented. The project is funded under Priority Axis 5 “Technical Assistance” of the Operational Program Transport 2007-2014. A total of 11 project preparation lots are being developed. The most important are the projects for the development of Sofia railway junction, Burgas railway junction, reconstruction and modernization of existing stations, preparation of detailed development plans and technical design for new stops and buildings, assessment and verification of compliance with the requirements for interoperability. For the technical design phase, the following projects are being developed: “Modernization of the Sofia – Dragoman railway line”, “Modernization of the Sofia – Pernik – Radomir railway line,” Development of the Sofia railway junction “and” Development of the Burgas railway junction “. Field surveys are conducted to search for archaeological sites within the scope of the projects. The article examines projects in terms of the need for exceptions to Ordinance 55.