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Moravske Branice - Oslavany Track Speed Increase
Hrdlička, Šimon ; Křemen, Tomáš (referee) ; Říha, Tomáš (advisor)
The bachelor's thesis deals with the increase of a track speed in the section Moravske Branice – Oslavany. The thesis attempts to obtain a speed increase by modifying the existing geometric parameters of the track in the scope of the regular maintenance, in some cases even more thorough, yet still not that costly. The assessment of geometric parameters of the track is done according to the standard CSN 73 6360-1. It is also assessed whether the individual railway crossings meet the conditions for the track speed increase. Part of the thesis is also the design of speed for vehicles with a permitted cant deficiency of 130 mm.
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Terminal Uhersky Ostroh
Pěček, Lukáš ; Petřík, Vlastimil (referee) ; Smělý, Martin (advisor)
The subject of this diploma thesis is the design of a pre-station area near the railway station Uherský Ostroh on track 340: Brno - Veselí nad Moravou and its connection to existing roads. The work alternatively addresses the method of connecting the area to the road I/55 in the build-up area of the town, the arrangement of parking and bus stops. Part of the design is also the connection of the area for the needs of pedestrians and suggests places for parking bicycles.
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Railway Crossings
Nováková, Anna-Marie ; Hoza, Miroslav (referee) ; Svoboda, Richard (advisor)
This bachelor thesis is focused on the railway crossings problem from the point of meaning of all available legislation. In this work I tried to find out whether all available legislative resources for railway crossings design are identical in their interpretation, as ambiguity of these resources could confuse drivers of vehicles and lead to the big number of traffic accidents. To solve this problem I analyzed all available legislative resources. I determined the most important chapters which context might be interpreted in a different way. Furthermore, I investigated which specific legislative resources deal with the problem and then compared it individually. By completion of this work I figured out that the most important chapters of existing legislative resources don’t contain ambiguity in railway crossing design.
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Influence of Explosive Hardening on the Structure and Characteristic of Hadfield Steel in Terms of use in the Railway Transport
Havlíček, Petr ; Podrábský, Tomáš (referee) ; Nesvadba,, Petr (referee) ; Schmidtová,, Eva (referee) ; Stránský, Karel (advisor)
The high alloyed austenitic manganese steel, the Hadfield steel, thanks to its good wear resistance of the work surface and maintaining the high toughness of the internal material in the same time, is successfully applied for casted crossings. The crossings are the most dynamic stressed components in the railway turnouts. Thanks to low surface and sub-surface hardness the occurrence of plastic deformation and the progressive wear of the crossing running surfaces can be found since the initial stages of the crossing operational life. One possibility how to increase the surface and the sub-surface hardness and this way improve the dimensional stability and the crossing lifetime as well is to apply the explosive hardening of the crossing running surfaces. The technology mentioned above means the application of the explosives in the imminent nearness to the running surface of the crossing, when the high pressure wave acting within the extremely short period actuates the plastic deformation of the material structure. The work deals with analysis of influence of explosive hardening on the structure and characteristic of Hadfield steel. The explosive hardened samples have the surface and the sub-surface hardness checked and the microscopic analysis and X – ray diffraction is applied, including the TEM analysis as well carried out by the transmission electronic microscope. The characteristics experimental testing including outcomes from assessment of the contact – fatigue load of the explosive hardened Hadfield steel samples are the part of the work as well. As an experiment final part the outcomes of the long –term validation, the surface hardness and wear of the crossing running surfaces of the explosive hardened crossing already installed into the Czech Republic railway track are introduced as well.
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