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

The assembly base is a permanent building site, where the elements of the track panel are assembled. It is characterized by large dimensions and weights of the processed parts and the final product. The report is based on observation and measurements of the existing assemble base in Kazichane and possibilities of modern computer technologies for modeling and simulation of the operation of the individual crane track elements. The unique of the studied crane track is that the rails are joined to half-sleepers lying on 1 m distance, not to a continuous beam, like in crane tracks in industry, and that the using materials are typical for the railway superstructu re.

The horizontal reaction of the rail is very important to the creation of the braking force. The value of rail reaction is equal to the value of the braking force. The subject of the article is the determination of braking force in two different ways. The first is based on braking pressure for one braking jay and friction between braking jay and wheel for vehicles equipped with block brake. The second is based on braked weight and braked weight percentage. The theoretical results obtained by the two methods are compared on the basis of the need for interoperability under Regulation 1299/2014 relating to Infrastructure subsystem of the rail system of the EU. The practical impact of braking force in declivities with a gradient of slope over 15 ‰ has been established on the basis of direct observations and analyzes. The experience in the operation of heavily inclined sections of the Gorna Oryahovitsa railway section has been used.

Interoperability for newly adopted countries in the EU is key to trains safety. Calculating the braking force used by the Leaflet 544-1 of the UIC Leaflet [1] brake elements is important for safety when running trains in the braking mode.
The researching of the facts shows that Regulation 58 [2] is harmonized with the contents of UIC Leaflet 544-1[1] and EU Regulation No 1302/2014 [3]. The test is to be used for the interoperability of the technical infrastructure in connection with Commission Regulation (EU) No 1299/2014 of 18 November 2014 [4] on technical specifications for interoperability with respect to the infrastructure subsystem of the railway system in the Union concerned.
When designing the rail lines used braking calculation, made by easy way remain based on the friction of the pads on the wheel surface, but it is not related to the examples in the UIC Leaflet 544-1 [1].

In view of the projects, which are being implemented in the second programming period 2014-2020 by the metropolitan municipality, a reconstruction of Graf Ignatiev Blvd was planned. An important part of it is the construction of the railway track. In fulfilment of the requirement for the elaboration of a diploma thesis on this topic, a number of options for implementation of the project, which apart from applied have a cognitive value. They meet the requirements for interoperability of technical infrastructure in relation to Commission Regulation (EU) No 1299/2014 of 18 November 2014 concerning the technical specifications for interoperability relating to the infrastructure subsystem of the rail system in the European Union [3].