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Dissertations / Theses on the topic 'Railway substructure'
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1
Kennedy, Justin. "A full-scale laboratory investigation into railway track substructure performance and ballast reinforcement." Thesis, Heriot-Watt University, 2011. http://hdl.handle.net/10399/2431.
Full textAbstract:
To reduce railway track maintenance costs and meet the growing demand for rail travel the railway industry needs to significantly increase the performance of old existing tracks and design any new tracks accordingly. In this thesis, a new full-scale laboratory Geopavement & Railway Accelerated Fatigue Testing (GRAFT) facility at Heriot-Watt University is developed to study the performance of both unreinforced and reinforced railway track substructure systems. The new GRAFT facility enables accelerated testing of full-scale railway tracks and innovative railway products under realistic railway loading conditions. The unreinforced track systems represent typical railway tracks in the UK while the reinforced track systems represent sections of track implemented with various geosynthetic products. GRAFT consists of a track constructed within a steel tank. The track comprises a 750mm clay subgrade layer overlain by a clay formation layer overlain by a 300mm ballast layer. The track includes three hardwood sleeper sections overlain by an I-section steel beam which has similar stiffness properties to a BS 113 A rail section. Cyclic loading is applied to the track from a hydraulic testing machine with the centre sleeper directly under the loading actuator. The loading mechanism replicates a repeated quasi static single wheel load on the central sleeper of one half of a 3m long section of railway track. Based on the results found from the testing programme in GRAFT empirical relationships are developed between the unreinforced track performance in terms of track settlement and stiffness and the subgrade modulus, applied load and number of applied cycles. These relationships fit the GRAFT data presented in this thesis well and it is thought that they could be used (tentatively) to estimate track settlement on track after tamping/ballast renewal/new track. These relationships are shown to be consistent with other well known track settlement models and they indicate that subgrade stiffness and applied vertical load are two of the most significant parameters that influence track substructure deterioration. The results found from the reinforced track tests quantify the improvement in track performance available with each product under various track conditions. Two ballast ii reinforcement products have been tested; XiTRACK reinforcement and geocell reinforcement, along with a reinforced geocomposite used primarily for separation at the ballast/subgrade interface. In addition, a geocomposite product designed to replace a traditional sand blanket, used on the tracks where severe subgrade erosion conditions prevail, has been tested in GRAFT under flooding conditions. The most significant results show that XiTRACK reinforcement can considerably improve the performance of railway tracks while the performance of the track implemented with the sand blanket replacement product indicates that currently a traditional sand blanket with a geotextile separator is the recommended option for tracks with subgrade wet spots. From all the data recorded empirical settlement models are proposed for each of the geosynthetics compared for reinforcement purposes. These models form the basis for reinforced track design graphs that could potentially be used to form part of an initial cost-benefit analysis of different track reinforcement techniques considered for improving track performance and reducing maintenance. In order to use the track settlement design graphs developed within this thesis (in the field) a reliable measure of subgrade stiffness needs to be made on track. A reliable insitu measuring device could enhance railway site investigations. Several in-situ measuring devices that could potentially be used to measures subgrade stiffness and strength in the field have been tested within GRAFT. The devices studied include the Dynamic Cone Penetrometer (DCP), Light Falling Weight Deflectometer (LFWD), Pocket Penetrometer and Proving Ring Penetrometer. The accuracy of these devices is compared to Plate Load Tests (PLT) and unconfined compression strength tests and suggestions towards the use of such devices on track made. The results indicate that the DCP has the potential to be a quick and accurate in-situ measuring device for railway track site investigations. The GRAFT facility and the results found in GRAFT have been validated using a basic static 3D FE computer model termed SART3D (Static Analysis of Railway Track 3D). The program has been calibrated to GRAFT by modifying the FE mesh for the dimensions of GRAFT and inputting the GRAFT track properties. The validated results from this thesis have direct practical implications to the railway industry in terms of iii design recommendations on how best to investigate and improve key geotechnical parameters that influence railway track performance and hence reduce maintenance costs and extend asset life. A review of current design procedures used in the railway industry is given and a new design procedure is suggested to reduce track maintenance and offer an optimised design and maintenance strategy.
2
Sangirieva, Irina. "The design of an overpass crossing on railway in Mirny, Arkhangelska Oblast, Russia." Thesis, KTH, Bro- och stålbyggnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90319.
Full textAbstract:
Bridge design and construction practice in former USSR, especially Russia, is not much known to the foreign engineers. Many advanced structural theories and construction practices have been established. In 1931, Franklin D. Roosevelt said, “There can be little doubt that in many ways the story of bridge building is the story of civilization. By it, we can readily measure a progress in each particular country.” The development of bridge engineering is based on previous experiences and historical aspects. Certainly, the Russian experience in bridge engineering has its own specifics. Bridge design proceeds in accordance with local standards and specifications. This study considers the basic rules and standards in bridge design in the North of Russia, the work includes the overview of Russian design concepts. The paper shows the design of typical concrete bridges including all calculations and analyses for future bridge stability and also drawings for visualisation. The results of the work are conclusions based on performing the required design calculations, drawings, preparing a final estimate and preparations for the construction. There are also some notes concerning the Russian design systems, computer programs for designing and computing and, finally, comparison of the Russians design standards and the Eurocode.
3
Yamaguchi, Teruya. "Synthesised H∞ıµ control design for a dynamically substructure system and it's application to railway testing facilities." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723510.
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4
RADAMPOLA, Senanie Sujeewa, and senanie s. radampola@mainroads qld gov au. "EVALUATION AND MODELLING PERFORMANCE OF CAPPING LAYER IN RAIL TRACK SUBSTRUCTURE." Central Queensland University. Centre for Railway Engineering, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060817.115415.
Full textAbstract:
In the design of rail track structures where the subgrade cannot achieve the desired
capacity, enabling the required standard of track geometry to be maintained for the speed,
axle load and tonnage to be hauled, a capping layer of granular material is placed
between the natural ground or the embankment fill material and the ballast to protect the
underlying weaker layers.
In spite of the important role played by the capping layer, very little research has been
carried out on its performance. The current practice of design of the capping layer,
therefore, is based on working stress philosophy where reduced levels of stresses are
assumed not to degrade the subgrade. Even on tracks containing a thick ballast layer that
ensures allowable levels of working stress the subgrade has been found to have
permanently deformed. Design of capping layers based on plastic deformation,
therefore, appears appropriate. This thesis aims at determining the load levels that cause
detrimental plastic deformation in the capping layer.
The suite of material properties that characterise plastic deformations of capping layer is
neither readily available nor easily determined. This thesis proposes a cheaper method of
evaluating a range of capping layer material properties using penetration tests on
specimens contained in California Bearing Ratio (CBR) test moulds coupled with a finite
element modelling based back calculation technique. The suite of material properties
thus determined are used for the simulation of the behaviour of capping layers under the
boundary and loading conditions similar to those in practice. The predicted results are
validated using laboratory experiments on large size capping layer specimens.
5
Syrový, Aleš. "Návrh rekonstrukce železniční stanice Horní Cerekev." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392112.
Full textAbstract:
The subject of the diploma thesis is to design a redevelopment of railway station Horni Cerekev, in order to meet current traffic and legislation on access of persons with reduced mobility. Two platforms with the platform edge height of 550 mm above the top of the rail have been designed. The amount of five running tracks through the station remains unchanged. Furthermore, the railway superstructure, railway substructure and conceptual design of space in front of the station.
6
Lehnert, Jan. "Návrh zvýšení traťové rychlosti v úseku mezi žst. Hanušovice a žst. Bludov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227559.
Full textAbstract:
In this thesis I propose increasing of the speed on the railway line No. 292 on the section žst.Bludov - žst. Hanušovice. It includes is complete design of horizontal and vertical ratios, eventually relocation of the track. Railway substructure is solved in selected sections. The thesis solves also editing of platforms and crossing structures.
7
Filo, Martin. "Rekonstrukce železniční stanice Chrudim." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227775.
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The subject of the diploma thesis is to design a redevelopment of railway station Chrudim in order to meet current legislation on access of persons with reduced mobility. Two platforms with the platform edge height of 550 millimetres above the top of the rail have been designed. The amount of four running tracks through the station remains unchanged. Furthermore, the railway superstructure, railway substructure and the new drainage system was also designed.
8
Málek, Jiří. "Návrh modernizace železniční stanice Valašské Meziříčí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-239996.
Full textAbstract:
The theme of this thesis is to design modernization of Valašské Meziříčí Railway Station. This thesis includes reconstruction of both station heads and the design of the platforms for the safe movement of persons with reduced mobility with seven platform edges in total. The thesis deals with the construction of the railway superstructure and substructure, including drainage.
9
Svrček, David. "Porovnání technologií rekonstrukce traťové koleje." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409757.
Full textAbstract:
This diploma thesis is focused on design and comparison of open line track procedures of work between stations Hranice na Moravě město and Hustopeče nad Bečvou. Subject is reconstruction of railway superstructure and substructure in kilometrage 7,785 598 to 15,016 545 (except section 8,173 463 to 8,700 000) of track n°1. The target of the thesis is to optimize open line track procedures by variation of technologies and mechanization.
10
Duong, Trong Vinh, and Trong Vinh Duong. "On the hydro-mechanical behavior of ancient railway flatforms in term of reinforcement by soil-mixing." Phd thesis, Université Paris-Est, 2013. http://pastel.archives-ouvertes.fr/pastel-00945680.
Full textAbstract:
The present work deals with the behavior of ancient railway sub-structure in France. A statistical study was firstly undertaken on problems occurred in the whole ancient French railway network. The analysis evidenced the particular importance of sub-grade quality for the performance of the sub-structure and the track geometry. Afterwards, an ancient railway line in the West of France was investigated. The analysis showed that the degradation speed of this line was correlated with different parameters such as the nature of sub-grades and the thickness of different layers. An increase trend of degradation speed with the increase in interlayer thickness was identified. The interlayer has a positive impact since it reduces the train-induced stress applied to the sub-grade. The hydro-mechanical behavior of interlayer soil under different conditions (water content, fines content, stress, number of cycles) was investigated. A set of triaxial tests and infiltration tests were performed for this purpose. By analyzing the shear strength properties, the permanent axial strain and the resilient modulus of interlayer soil, we found that the water content and the fines content must be considered together. Adding more fines into the interlayer presents a positive impact under unsaturated conditions thanks to the suction effect, but a negative impact under saturated conditions. The infiltration column tests with drying/wetting cycles showed that the hydraulic conductivity of interlayer soil is governed by fines fraction but did not change significantly with fines content. In order to study the mechanism of interlayer creation and mud pumping, a physical model of 550 mm inner diameter was developed. Soil samples representing the ancient French railway substructure with a ballast layer overlying an artificial silt layer (mixture of crushed sand and kaolin were tested. The effects of monotonic and cyclic loadings, water content and dry unit mass of sub-soil were investigated. It was found that the pore water pressure developed in the sub-soil and the sub-soil stiffness are the key factors for the migration of fine particles or the creation of interlayer/mud pumping. Water is the necessary condition, but it is the soil compressibility that governs the phenomenon to occur
11
Jelínková, Markéta. "Porovnání rekonstrukce žst. Březová nad Svitavou s výstavbou nové zastávky." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265255.
Full textAbstract:
The task of the thesis is to propose an adjustment to the railway station Březová nad Svitavou with regard to the introduction of the remote control of security device and explore the possibility of building a new railway stop that would be located closer to downtown. The aim is mutual comparison of elaborated variants. Work includes design of new platforms meet the conditions for safe access for people with limited mobility, next adjustment are adjustment of the geometric parameters of the track superstructure and substructure, including system of drainage station.
12
Šíp, Radek. "Třetí kolej v úseku Blansko - Rájec-Jestřebí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392213.
Full textAbstract:
The task of the thesis is to propose the third track in track section Blansko - Rájec-Jestřebí and increasing line speed with maximum use of existing track body and grounds of SŽDC, s.o. Next is the design of the reconstruction of all engineering objects (bridges, runoffs, railway crossings and platforms). Additioning of the third track will cause extensive structural modifications at railway stations Blansko and Rájec-Jestřebí. Within the building will be verified construction of new railway stop Spešov.
13
Veselý, Miroslav. "Návrh modernizace železniční stanice Hanušovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226651.
Full textAbstract:
The objective of my masters thesis is to design a modernization of the railway station Hanušovice. Main requirements of this thesis include the reconstruction of both end sections of the station, increasing the speed of the main track and to design the platforms for persons with reduced mobility. At least four platform edges are required. The last requirement is the design of substructure including drainage.
14
Rous, Petr. "Rekonstrukce železniční stanice Nedvědice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240104.
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The aim of the thesis is a reconstruction of Nedvědice railway station. The thesis contains modification of track geometry parameters of the railway, reconstruction of the railway superstructure and railway substructure. Platform with the platform edge height of 550 millimetres above the top of rail was designed. Design of a railway crossings according to valid regulations is other part of thesis. The thesis also include drainage system renovation.
15
Prikner, Pavel. "Studie rekonstrukce železniční stanice Kyjov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392072.
Full textAbstract:
The master´s thesis deals with the reconstruction design of Kyjov railway station. The solution is aimed at meeting the traffic requirements, modifying the layout of the platforms and access routes for the safe movement of people with reduced mobility and orientation. The proposal deals with rail crossing in accordance with current legislations. In this thesis is proposed renewal of drainage.
16
Kubina, Jiří. "Studie rekonstrukce železničních stanic Jindřichov na Moravě a Branná." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226638.
Full textAbstract:
The master thesis "Upgrading of Jindřichov na Moravě and Branná Railway Stations" deals with designing new platforms that are suitable for people with reduced mobility in accordance with applicable laws and standards. Platforms with the platform edge height of 550 millimetres above the top of rail were designed. The speed limit was increased from the original 40 km/h up to 50 km/h. Moreover, the thesis design reconstruction of railway superstructure and railway substructure and deal with the drainage system.
17
Francová, Aneta. "Rekonstrukce železniční stanice Jeseník." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227777.
Full textAbstract:
The master thesis "Upgrading of Jeseník Railway Stations" deals with designing new platform that is suitable for people with reduced mobility in accordance with applicable laws and standards. Platform with the platform edge height of 550 millimetres above the top of rail were designed. The speed limit was increased. Moreover, the thesis design reconstruction of railway superstructure and railway substructure and deal with the drainage system.
18
Duong, Trong Vinh. "On the hydro-mechanical behavior of ancient railway flatforms in term of reinforcement by soil-mixing." Thesis, Paris Est, 2013. http://www.theses.fr/2013PEST1106/document.
Full textAbstract:
Le présent travail porte sur le comportement des plates-formes ferroviaires anciennes en France. Tout d'abord, une étude statistique a été menée sur les problèmes survenus dans l'ensemble du réseau ferroviaire français. L'analyse montre l'importance particulière de la qualité du sol support pour la performance de la sous-structure et pour la tenue géométrique des voies. Ensuite, une ligne ferroviaire ancienne située à l'Ouest de la France a été étudiée spécifiquement. Les analyses montrent que la vitesse de dégradation de cette ligne est en corrélation avec les différents paramètres tels que la nature de sol support, l'épaisseur des couches de la sous-structure. Une tendance d'augmentation de la vitesse de dégradation avec la diminution de l'épaisseur de la couche intermédiaire est identifiée. Cette couche as un impact positif puisqu'elle réduit les contraintes appliquées au sol support. Le comportement hydromécanique du sol de la couche intermédiaire dans des conditions différentes (teneur en eau, teneur en particules fines, charge, nombre de cycles) a été étudié. Des essais triaxiaux et des essais de colonne d'infiltration ont été réalisés à cette fin. En analysant les propriétés de résistance au cisaillement, la déformation axiale permanente et le module réversible, on a constaté que les effets de la teneur en eau et de la teneur en fines doivent être pris en compte ensemble. Une augmentation de teneur en fines dans la couche intermédiaire présente un impact positif à l'état non saturé grâce à l'effet de la succion, mais un impact négatif à l'état saturé. Les essais de colonne d'infiltration avec des cycles de séchage/humidification ont montré que la conductivité hydraulique du sol est gouvernée par la fraction de fines et qu'elle ne change pas significativement avec la teneur en fines. Afin d'étudier les mécanismes de la création de la couche intermédiaire et de remontée boueuse, un modèle physique de 550 mm de diamètre intérieur a été développé. Des échantillons de sol qui représentent la sous-structure ferroviaire ancienne avec une couche de ballast posée sur une couche de limon artificielle (mélange de sable concassé et du kaolin) ont été testés. Les effets des charges monotones et cycliques, de la teneur en eau et de la masse volumique sèche du sol support ont été étudiés. Il a été constaté que la pression interstitielle développée dans le sol support et la rigidité du sol support sont des facteurs clés pour la migration des particules fines ou la création de la couche intermédiaire/la remontée boueuse. L'eau est la condition nécessaire, mais c'est la compressibilité du sol support qui gouverne le phénomène à se produireThe present work deals with the behavior of ancient railway sub-structure in France. A statistical study was firstly undertaken on problems occurred in the whole ancient French railway network. The analysis evidenced the particular importance of sub-grade quality for the performance of the sub-structure and the track geometry. Afterwards, an ancient railway line in the West of France was investigated. The analysis showed that the degradation speed of this line was correlated with different parameters such as the nature of sub-grades and the thickness of different layers. An increase trend of degradation speed with the increase in interlayer thickness was identified. The interlayer has a positive impact since it reduces the train-induced stress applied to the sub-grade. The hydro-mechanical behavior of interlayer soil under different conditions (water content, fines content, stress, number of cycles) was investigated. A set of triaxial tests and infiltration tests were performed for this purpose. By analyzing the shear strength properties, the permanent axial strain and the resilient modulus of interlayer soil, we found that the water content and the fines content must be considered together. Adding more fines into the interlayer presents a positive impact under unsaturated conditions thanks to the suction effect, but a negative impact under saturated conditions. The infiltration column tests with drying/wetting cycles showed that the hydraulic conductivity of interlayer soil is governed by fines fraction but did not change significantly with fines content. In order to study the mechanism of interlayer creation and mud pumping, a physical model of 550 mm inner diameter was developed. Soil samples representing the ancient French railway substructure with a ballast layer overlying an artificial silt layer (mixture of crushed sand and kaolin were tested. The effects of monotonic and cyclic loadings, water content and dry unit mass of sub-soil were investigated. It was found that the pore water pressure developed in the sub-soil and the sub-soil stiffness are the key factors for the migration of fine particles or the creation of interlayer/mud pumping. Water is the necessary condition, but it is the soil compressibility that governs the phenomenon to occur
19
Dorko, Patrik. "Studie rekonstrukce žst. Letovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371864.
Full textAbstract:
The subject of the master’s thesis is to design a reconstruction of the Letovice railway station for access for persons with reduced mobility and orientation. The thesis deals with adjustment to the railway superstructure, substructure and drainage system of the station. Part of the thesis is explore the possibility of building a new railway stop.
20
Klar, Vít. "Rekonstrukce železniční stanice Veselí nad Moravou." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265621.
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The subject of the Master's thesis is to design the redevelopment of the Veseli nad Moravou railway station. This renovation will include renewal of both, railway superstructure and substructure, including drainage system and new platform construcion proposal in order to meet current legislation regarding access of persons with reduced mibility and orientation skills. This thesis also deals with design of the track geometry compoments and geometry of set of switches at both heads of the railway station to fulfill the maximum train velocity demands at certain tracks. Last but not least, the rail track scheme of the station has been simplified.
21
Vaněk, Jan. "Porovnání technologií rekonstrukce železniční stanice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409758.
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The diploma thesis compiles working method of construction works at Pačejov railway station and in adjacent double-track section in the range of working procedures from SP0 to SP3a. The thesis compares the time and economical aspects of individual technologies and entire construction methods. The thesis includes description of rail and non-rail mechanization.
22
Fabiánová, Lucie. "Návrh rekonstrukce železničních stanic Ždírec nad Doubravou a Hlinsko v Čechách." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227767.
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The aim of the diploma thesis is to design of reconstruction of the Ždírec nad Doubravou railway station and Hlinsko v Čechách railway station, and to allow access for persons with reduced mobility. Resolving a modification of the track (reconstruction gridiron), design the reconstruction of the substructure and drainage railway stations.
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Řehůřek, Tomáš. "Návrh modernizace žst. Slavkov u Brna." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227331.
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This thesis deals with the project of modernization of Slavkov u Brna railway station. The main aim is to draft adjustments of the platforms to fulfil the requirements for the movement of people with reduced mobility. To decide which kind of platform is possible to build. Also to plan the adjustments to track bed and platforms taking into consideration what the customer of railway operation had ordered. To draft reconstruction taking into consideration how old and worn-out permanent way and substructure is, with the posibility to increasing track speed.
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Hřib, Oldřich. "Studie rekonstrukce železniční stanice Zruč nad Sázavou." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227803.
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Primary objective of diploma thesis is design geometrical parameters of tracks at railway station Zruč nad Sázavou for three new platforms with acces options for paralyzed people and preservetion four railway tracks. Other objective is proposition of track drainage and reconstruction superstructure and substructure
25
Turoň, Martin. "Porovnání technologií rekonstrukce traťové koleje." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372229.
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The theme of this diploma thesis deals with comparing technologies of reconstruction of the railway track No. 2 between railway stations Hranice na Morave and Hustopece nad Becvou in km 7,792 393 – 7,967 592 and in km 8,725 000 – 14,988 677. The aim of the thesis is to design several variants for the reconstruction of the substructure and superstructure, and then compare these variants. This thesis deals with technologies with removal of the track length and with technologies without removal of the track length. Part of the thesis is a description of used technologies and machines connected with them.
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Sobotka, Lukáš. "Rekonstrukce železničních stanic Ledeč nad Sázavou a Chotěboř." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226084.
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The aim is design of Ledeč nad Sázavou railway station renovation. This renovation has to satisfied current traffic and valid legislation, especially entrance for persons with reduced mobility. There is the new platform at Chotěboř railway station according to current legislation. Change of trackage was in a very small way.
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Alsalamat, Hassan. "Verfahren zur Ermittlung des Einflusses von infrastrukturellen und betrieblichen Faktoren auf die spezifischen Kosten der Eisenbahninfrastruktur." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-94912.
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Die Arbeit ist ein Beitrag zur betrieblich-ökonomischen Optimierung der Eisenbahninfrastruktur auf der Grundlage ihres Kosten-Nutzen-Verhältnisses. Der wesentliche Inhalt der Arbeit ist die Erarbeitung einer Methodik, mit deren Hilfe die Kosten einer Eisenbahnstrecke je fahrbarer Zugtrasse, basierend auf Streckenstandards, der Deutsche Bahn AG, berechnet werden können.
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Kipper, René. "Nutzung von Gleismessdaten für die Überwachung von Verformungen an Erdkörpern von Schienenfahrwegen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-210264.
Full textAbstract:
In der Dissertation ist eine Methodik beschrieben, die es ermöglicht, mittel- und langwellige Gradientenänderungen auf Grundlage der Rohdaten des bei der DB AG zur Gleisgeometrieprüfung gemäß RIL 821.2001 eingesetzten Messfahrzeuges RAILab zu detektieren.
Weil mittel- und langwellige Längshöhenfehler eines Gleises die Verschlechterung der Tragfähigkeitseigenschaften von Bettung/Unterbau/Untergrund anzeigen, können mit der Methodik Zustandsänderungen von Erdkörpern kontrolliert werden. Dabei ist eine geodätische Aufnahme von Verformungen, wie sie derzeit beim Monitoring von Erdkörpern im Allgemeinen angewendet wird, nicht erforderlich. Die Methodik wurde an einem Streckenabschnitt, in welchem infolge von verformungsempfindlichen Böden im Untergrund erhebliche Gleisverformungen eingetreten waren, erprobt und durch Vergleich mit geodätischen Messdaten verifiziert.
Weiterhin wurde ein Vorschlag zur Festlegung von Aufmerksamkeitswerten für mittel- und langwellige Höhenänderungen unterbreitet. Die vorgeschlagenen Aufmerksamkeitswerte wurden wirkungsbezogen auf Grundlage der Vertikalbeschleunigung abgeleitet, die ein Feder-Dämpfer-Modell bei der Überfahrt über einen aus den RAILab-Gleismessdaten rekonstruierten Höhenverlauf eines Gleises erfährt.
Über zwei Beispiele der Anwendung der Methodik bei der Sonderinspektion von Erdkörpern wird berichtet.
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Martins, Margarida Milicic Cameira. "Numerical modelling of the railway track with reinforced substructure." Dissertação, 2017. https://repositorio-aberto.up.pt/handle/10216/107668.
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Martins, Margarida Milicic Cameira. "Numerical modelling of the railway track with reinforced substructure." Master's thesis, 2017. https://repositorio-aberto.up.pt/handle/10216/107668.
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Sussmann, Theodore Reinhold. "Application of ground-penetrating radar to railway track substructure maintenance management." 1999. https://scholarworks.umass.edu/dissertations/AAI9932349.
Full textAbstract:
Railway track substructure maintenance management is the process of utilizing railroad resources to maintain and upgrade the track substructure. The process begins with a measure of the track condition to evaluate the substructure performance, determine locations along the track that require maintenance, and identify appropriate solutions. Ground penetrating radar (GPR) has been proposed as a potentially valuable tool for this purpose. The objective of the research was to develop GPR testing and data interpretation techniques suitable for use by railroad personnel in this application. The principle of GPR operation is the transmission of short electromagnetic waves into the subsurface and recording the resulting signal of the reflected waves. Electromagnetic waves are influenced most significantly by the dielectric constant of the soil. The dielectric constant is most affected by moisture content making GPR a valuable tool for locating trapped water that will cause increased track deterioration rates. GPR has the potential to evaluate the thicknesses and properties of the substructure layers on a continuous, non-destructive basis to improve the process of diagnosing substructure causes of track performance deterioration. GPR railroad research at UMass started with the construction of a test track. Different track structure components were tested to determine their effects on the GPR data. Approximately 200 tests were conducted. Subsequently, about 275 miles of data were collected on several U.S. railroads including Amtrak, Conrail, New England Central, and Burlington Northern Santa Fe, and in England on AMEC Rail. The data were studied to determine how well GPR can define substructure conditions, identify track problem areas, and provide an indication of the cause of the problem. The analysis included comparison of the GPR data to track geometry, subsurface stratigraphy, and ballast condition (fouling and moisture). GPR processing techniques were developed to simplify interpretation of the data. The results showed that GPR could locate zones of increased substructure degradation at over 75% of the sites.
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Alsalamat, Hassan. "Verfahren zur Ermittlung des Einflusses von infrastrukturellen und betrieblichen Faktoren auf die spezifischen Kosten der Eisenbahninfrastruktur." Doctoral thesis, 2011. https://tud.qucosa.de/id/qucosa%3A26124.
Full textAbstract:
Die Arbeit ist ein Beitrag zur betrieblich-ökonomischen Optimierung der Eisenbahninfrastruktur auf der Grundlage ihres Kosten-Nutzen-Verhältnisses. Der wesentliche Inhalt der Arbeit ist die Erarbeitung einer Methodik, mit deren Hilfe die Kosten einer Eisenbahnstrecke je fahrbarer Zugtrasse, basierend auf Streckenstandards, der Deutsche Bahn AG, berechnet werden können.
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Kipper, René. "Nutzung von Gleismessdaten für die Überwachung von Verformungen an Erdkörpern von Schienenfahrwegen." Doctoral thesis, 2015. https://tud.qucosa.de/id/qucosa%3A29816.
Full textAbstract:
In der Dissertation ist eine Methodik beschrieben, die es ermöglicht, mittel- und langwellige Gradientenänderungen auf Grundlage der Rohdaten des bei der DB AG zur Gleisgeometrieprüfung gemäß RIL 821.2001 eingesetzten Messfahrzeuges RAILab zu detektieren.
Weil mittel- und langwellige Längshöhenfehler eines Gleises die Verschlechterung der Tragfähigkeitseigenschaften von Bettung/Unterbau/Untergrund anzeigen, können mit der Methodik Zustandsänderungen von Erdkörpern kontrolliert werden. Dabei ist eine geodätische Aufnahme von Verformungen, wie sie derzeit beim Monitoring von Erdkörpern im Allgemeinen angewendet wird, nicht erforderlich. Die Methodik wurde an einem Streckenabschnitt, in welchem infolge von verformungsempfindlichen Böden im Untergrund erhebliche Gleisverformungen eingetreten waren, erprobt und durch Vergleich mit geodätischen Messdaten verifiziert.
Weiterhin wurde ein Vorschlag zur Festlegung von Aufmerksamkeitswerten für mittel- und langwellige Höhenänderungen unterbreitet. Die vorgeschlagenen Aufmerksamkeitswerte wurden wirkungsbezogen auf Grundlage der Vertikalbeschleunigung abgeleitet, die ein Feder-Dämpfer-Modell bei der Überfahrt über einen aus den RAILab-Gleismessdaten rekonstruierten Höhenverlauf eines Gleises erfährt.
Über zwei Beispiele der Anwendung der Methodik bei der Sonderinspektion von Erdkörpern wird berichtet.
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Viana, Filype Tavares Carvalho. "O papel da geotecnia na degradação de infraestruturas ferroviárias." Master's thesis, 2020. http://hdl.handle.net/10316/94014.
Full textAbstract:
Dissertação de Mestrado em Mecânica dos Solos e Engenharia Geotécnica apresentada à Faculdade de Ciências e TecnologiaAs ferrovias são um dos principais meios de transporte responsáveis por garantir a mobilidade urbana de pessoas bem como, o escoamento de bens e produtos de um país. Mesmo com a queda no incentivo de sua utilização, as vias férreas experimentaram importantes transformações visando torná-las mais atrativas. No tocante ao transporte de pessoas, houve recentemente uma tendência no crescimento de sua utilização. Este aumento na procura origina maiores solicitações sujeitando as vias férreas a maiores taxas de degradação dos elementos/camadas constituintes e, consequentemente, maiores operações de manutenção. Até algum tempo, os estudos eram direcionados à modificação e entendimento dos componentes mais superficiais, contudo, muitos dos mecanismos de degradação das vias mais comuns, encontram-se associados ao comportamento do balastro e solo de fundação onde a via férrea encontra-se assente. A degradação associada a estes dois componentes impactam diretamente nos custos de manutenção e, em situações extremas, podem colocar em risco a integridade dos utilizadores. Sendo a geotecnia o ramo da engenharia civil incumbida por estudar o comportamento dos solos e rochas, esta assume um lugar relevante na tomada de decisões que busquem sanar/minimizar as degradações, promovendo e idealizando soluções que garantam o pleno funcionamento das vias férreas. Ademais, para implementação de uma ferrovia, muitas vezes, é necessário a realização de obras adjacentes de caráter maioritariamente geotécnico, como o caso dos aterros, escavações, e zonas de transição. É objeto de estudo desta dissertação, uma recolha bibliográfica visando a clarificação da real importância da geotecnia no âmbito ferroviário, relacionado os principais mecanismos de degradação do solo de fundação com a exploração de uma via férrea balastrada. Aprsentam-se os conceitos fundamentais para o entendimento do seu comportamento, avaliação da degradação no tempo, bem como algumas das soluções mais utilizadas na esfera ferroviária e geotécnica.
Railways are one of the main means of transportion responsible for ensuring the urban mobility of people as well as the flow of goods and products of a country. Even with the drop in the incentive for its use, the railways underwent important transformations aiming to make them more attractive. Concerning the transportation of people, recently, a trend in the growth of its use has been observed. This increase in interest originates greater demands, subjecting the railways to higher degradation rates of the constituent elements/layers and, consequently, greater maintenance operations. In recent past, studies aimed at modifying and understanding the most superficial components, however, many of the degradation mechanisms of the most common railway are associated with the behavior of ballast and foundation soil where the railroad is based. The degradation associated with these two components impact maintenance costs and, in extreme situations, can put users' integrity at risk. As geotechnics is the branch of civil engineering charged with studying the behavior of soils and rocks, it assumes a relevant place in decision-making that seeks to remedy / minimize degradation, promoting and idealizing solutions that guarantee the full functioning of the railways. Also, for the implementation of a railway, it is often necessary to carry out adjacent works of a mostly geotechnical character, such as landfills, excavations, and transition zones. The object of study of this dissertation is a bibliographic collection aimed at clarifying the real importance of geotechnics in the railway sphere, related to the main mechanisms of degradation of the foundation soil with the exploration of a ballasted railroad. Fundamental concepts are presented for understanding their behavior, assessing degradation in time, as well as some of the most used solutions in the railway and geotechnical sphere.