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British Railways, 1948-73 : a business history
This is a business history of the first 25 years of nationalized railways in Britain. Commissioned by the British Railways Board and based on the Board's extensive archives, it fully analyses the dynamics of nationalized industry management and the complexities of the vital relationship with government.
Book
Research Progress of High-Speed Wheel–Rail Relationship
The research on wheel–rail relationship includes the basic theoretical models and corresponding numerical methods of wheel–rail in rolling contact, geometric parameter matching and material matching of them, friction and wear, wheel–rail rolling contact fatigue, wheel–rail adhesion and noise. They are also key theoretical and technical problems of the high-speed train/track coupling system. The basic theoretical models of wheel–rail in rolling contact and the corresponding numerical methods are the basis and one of the basic means for solving other wheel–rail relationship problems. The other is the experimental means. Moreover, the modeling and analysis of coupling behavior of the train and track can only be realized by means of the wheel–rail rolling contact mechanics model and its corresponding numerical method. This paper mainly discusses some research work and achievements on high-speed wheel–rail relationship problems since China opened a high-speed railway system on a large scale. The discussions in this paper include the classic wheel–rail rolling contact theoretical models (analytical forms) and the modern wheel–rail rolling contact theories (numerical methods), their advantages and disadvantages, their application and future development direction of them. The reviewed research progress on the other wheel–rail relationships mainly expounds the thorny problems of the wheel–rail relationship encountered in the operation of China’s high-speed railway, how to adopt new theoretical analysis methods, test means and take effective measures to solve these problems. It also includes research results of similar important reference values performed by international peer experts in related fields. Challenging and unsolved problems in high-speed wheel–rail relationship research are also reviewed in the full text.
Journal Article
Experimental Study on Fatigue Performance of Steel Used in U75V Rails
The 60 kg/m U75V rail serves as the predominant rail type within China’s high-speed rail network. This study comprehensively evaluates the fatigue behavior of U75V rails through experimental investigations encompassing monotonic tensile testing, high-cycle fatigue characterization, and fatigue crack propagation analysis. All specimens were extracted from standardized 60 kg/m high-speed rail sections to ensure material consistency. Firstly, monotonic tensile tests were conducted to determine the fundamental mechanical properties of the U75V rail. Secondly, uniaxial tension–compression fatigue tests were conducted to establish the S-N and P-S-N relationships of the U75V rail. Lastly, fatigue crack propagation analysis was carried out on three compact tension specimens under three incremental loading forces. Monotonic tensile test results demonstrated full compliance of the material’s basic mechanical properties with Chinese national standards. Fatigue crack propagation results indicated that the crack growth rate of the U75V rail was not only related to the stress-intensity range ∆K but was also correlated with the loading force range ∆F due to a typical crack tip shielding effect, i.e., plasticity-induced crack closure effect. The derived fatigue performance parameters and crack growth mechanism provide essential inputs for predictive fatigue life modeling of high-speed rail infrastructure and development of refined finite element models for fatigue analysis.
Journal Article
Underground worlds : a guide to spectacular subterranean places
A visual and anecdotal exploration of the curious worlds hidden beneath our feet, including ancient cities, salt mine cathedrals, underground amusement parks, and more. From bone-filled catacombs to sculpted salt churches to hand-carved cave complexes large enough to house 20,000 people, Underground Worlds is packed with more than 50 unusual destinations that take some digging to find. Award-winning travel writer David Farley revels in the unexpected, whether it is a cave city in China which houses one of the world's largest collections of Buddhist art or an old salt mine converted into a theme park in Romania. Stunning photos help readers see places they could not even imagine, such as a three-story underground train station in Taiwan that is home to the a 4,500-panel \"Dome of Light\" that is the largest glasswork on Earth, as well as secret spaces, such as an ornate temple built beneath a suburban home in Italy. Throughout the fascinating text are themed entries of underground systems such as the 2,500-year-old water tunnels of Kish Qanat in Iran or engineering marvels like the New York City steam tunnels.
Book
Impact of Proximity to Light Rail Rapid Transit on Station-area Property Values in Buffalo, New York
This study assesses the impact of proximity to light rail transit stations on residential property values in Buffalo, New York, where light rail has been in service for 20 years, but population is declining and ridership is decreasing. Hedonic models are constructed of assessed value for residential properties within half a mile of 14 light rail stations and independent variables are included that describe property characteristics, neighbourhood characteristics and locational amenities. The model suggests that, for homes located in the study area, every foot closer to a light rail station increases average property values by $2.31 (using geographical straight-line distance) and $0.99 (using network distance). Consequently, a home located within one-quarter of a mile radius of a light rail station can earn a premium of $1300-3000, or 2-5 per cent of the city's median home value. Model results further suggest that three independent variables—the number of bathrooms, size of the parcel and location on the East side or West side of Buffalo—are more influential than rail proximity in predicting property values. Individual regression models for each of the light rail system's 14 stations suggest that effects are not felt evenly throughout the system. Proximity effects are positive in high-income station areas and negative in low-income station areas. An analysis of the actual walking distance to stations (along the street network) versus the perceived proximity to stations (measured by straight-line distance) reveals that the results are statistically more significant in the network distance than the straight-line distance model, but the effects are greater in the straight-line distance model, which suggests that apparent proximity to rail stations is an added locational advantage compared with physical walking distance to the station.
Journal Article
Rail corrugation: Characteristics, causes, and treatments
Rail corrugation is a phenomenon of great diversity but appears now to be substantially understood. This review proposes some differences in classification of the phenomenon to take account of work undertaken since a widely cited review was published by Grassie and Kalousek in 1993, it attempts to fill holes in an overall understanding of the problem, and answers questions that remained open in 1993 and several that have arisen since. All types of corrugation that have been documented to date are essentially constant-frequency phenomena. By treating the vehicle—track system in its entirety, treatments are proposed that impinge upon track and vehicle design as well as upon the wheel—rail interface where corrugation appears. There is no neat solution to rail corrugation, but it can be treated comprehensively and in many cases also prevented by using products that are already commercially available. Since the frequency of common wavelength-fixing mechanisms varies roughly in the range 50—1200 Hz, trains travelling at different speeds can produce corrugation of substantially similar wavelength by different mechanisms in different locations. Although historical data can no longer be checked, this is the most likely explanation of the belief that rail corrugation was a substantially constant-wavelength phenomenon.
Journal Article
Infrastructure imaginaries
In the last decade light rail transit systems have become a popular mode of public transport in many cities around the world to upgrade the existing public transportation network, but also, and perhaps more importantly, to support neoliberal urban development strategies. The paper takes its starting point in the growing critical literature discussing the politics of light rail and related transport infrastructure projects in the context of neoliberalism. The paper uses the case of Aalborg, Denmark, to demonstrate how light rail projects are embedded in particular infrastructure imaginaries, which reflect wider political agendas of promoting urban development and economic growth. In the case of Aalborg, the city’s spatial strategies have played an important role in constructing an imaginary of the city as the region’s ‘growth dynamo’, which in turn have led to a growth-fixated conceptualisation of the city’s spatiality, and contributed to rationalising the need for investments in light rail. The paper argues that light rail projects are first and foremost politically rationalised as important investments for facilitating urban development and supporting entrepreneurial city strategies of urban and economic growth, whilst their social objectives of providing affordable public transportation play a less prominent role in the contemporary imaginary of the city.
在过去的十年中，轻轨交通系统已经成为世界上许多城市的一种流行的公共交通方式，旨 在升级现有的公共交通网络，同时，也许更重要的是，支持新自由主义的城市发展策略。 本文以讨论新自由主义背景下轻轨和相关交通基础设施项目政治的、日益增长的批判性文 献为出发点。本文以丹麦奥尔堡为例，展示轻轨项目是如何嵌入到特定的基础设施想象中 的，这些想象反映了促进城市发展和经济增长的更广泛的政治议程。在奥尔堡的例子中， 该城市的空间策略在将该城市想象成该地区的“增长发电机”方面发挥了重要作用，这反过 来又导致了该城市空间的增长导向概念化，并有助于使轻轨投资需求合理化。本文认为， 轻轨项目首先在政治上被合理化，因其是促进城市发展和支持城市和经济增长的创业型城 市战略的重要投资，而其提供负担得起的公共交通的社会目标在城市的当代想象中发挥着 不太突出的作用。
Journal Article
Change in the Properties of Rail Steels during Operation and Reutilization of Rails
The paper considers the possibility of reusing previously used railway rails. The analysis is conducted using the standards and operating conditions of the rails of one of the Central Asian states, Kazakhstan, as an example. The operation of these rails causes significant stresses, while the surface layers are strengthened as a result of cold hammering. These phenomena significantly change the physical and mechanical characteristics of rails. As a result, they may not be suitable in terms of parameters for basic use but can be suitable for installation on other tracks. The conducted studies have shown that when the standard service life of the RP65 rail expires, the surface layer is deformed to a depth of up to 300 microns, hardness increases, and internal residual stresses are formed. These changes lead to an increase in the strength properties of the rails. However, at the same time, cracks originate in the surface layer of the rail, thus worsening operational characteristics. The RP65 rails are used under a cyclic load of 700 kN (which is determined by the national standard), withstanding 790,000 cycles. When the load is reduced to 510 kN, these rails can withstand the 2,000,000 cycles required by the standard without failure. Thus, these rails can be reutilized only on non-loaded and non-critical sections.
Journal Article
Correction: Study on static properties and mechanism of basalt fibre reinforced cement cured red sandstone soil
[This corrects the article DOI: 10.1371/journal.pone.0334316.].
Journal Article