Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Railway Substructure System Based on Asphalt
Over the past few decades, the rail industry has been aiming to provide an infrastructure capable of accommodating faster, heavier and more frequent trains along with lower tolerance for maintenance-related delays and no compromise on travel safety. Under these conditions, conventional ballasted tracks are approaching their performance limits – mainly due to ballast breakage and fouling that undermine track stability and require ever more frequent maintenance. This state of affairs has led to the development of slab stack technology – a ballastless track infrastructure based on Portland cement concrete. The slab track solution was able to increase track stability, reduce maintenance frequency, and essentially provide for all above-mentioned requirements. However, the initial construction costs are very high, and maintenance activities (when necessary) are both expensive and time-consuming. Slab track technology is also known to amplify noise levels. In this context, the current study focused on another type of ballastless track technology - based on asphalt concrete. While asphalt concrete is widely used for the construction of various transport infrastructures, its use within the rail industry has been very limited with only few reported implementations of ballastless asphalt tracks - mainly in tunnels. Although the solution seems workable and promising, data from the existing tracks are not available (at least not publically) and related scientific literature on the idea is very limited. Therefore, the overall aim of this work was to contribute to the understanding of the behaviour of ballastless asphalt tracks – with emphasis on mechanical responses to train-like loading. This goal was pursued by combining a full-scale experimental investigation with numerical and analytical model developments. Experimental investigation was carried out by constructing and mechanically interrogating a full-scale mockup. Part of the mockup was built inside a steel container; it was further constructed, instrumented, and tested ...
Railway Substructure System Based on Asphalt
Over the past few decades, the rail industry has been aiming to provide an infrastructure capable of accommodating faster, heavier and more frequent trains along with lower tolerance for maintenance-related delays and no compromise on travel safety. Under these conditions, conventional ballasted tracks are approaching their performance limits – mainly due to ballast breakage and fouling that undermine track stability and require ever more frequent maintenance. This state of affairs has led to the development of slab stack technology – a ballastless track infrastructure based on Portland cement concrete. The slab track solution was able to increase track stability, reduce maintenance frequency, and essentially provide for all above-mentioned requirements. However, the initial construction costs are very high, and maintenance activities (when necessary) are both expensive and time-consuming. Slab track technology is also known to amplify noise levels. In this context, the current study focused on another type of ballastless track technology - based on asphalt concrete. While asphalt concrete is widely used for the construction of various transport infrastructures, its use within the rail industry has been very limited with only few reported implementations of ballastless asphalt tracks - mainly in tunnels. Although the solution seems workable and promising, data from the existing tracks are not available (at least not publically) and related scientific literature on the idea is very limited. Therefore, the overall aim of this work was to contribute to the understanding of the behaviour of ballastless asphalt tracks – with emphasis on mechanical responses to train-like loading. This goal was pursued by combining a full-scale experimental investigation with numerical and analytical model developments. Experimental investigation was carried out by constructing and mechanically interrogating a full-scale mockup. Part of the mockup was built inside a steel container; it was further constructed, instrumented, and tested ...
Railway Substructure System Based on Asphalt
Bose, Tulika (Autor:in)
01.01.2020
Bose , T 2020 , Railway Substructure System Based on Asphalt . Technical University of Denmark, Department of Civil Engineering .
Buch
Elektronische Ressource
Englisch
DDC:
690
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| British Library Online Contents | 2018