dc.description.abstract | The rail is the only component of trackwork system that supports the train steel wheel directly, and it is fixed by the fastener system that consists of some important components. Therefore, if the components in the fastener system are damaged, it will not only affect the stability of the rail directly but impact the safety of the train operation. So we have to face the risk of the fastener system damages cautiously.
During the trial operation of Taiwan Taoyuan International Airport Access MRT, it was found that the fastener system components were damaged. The running train might be derailed then the passengers’ life safety would be threatened due to the damage of fastener system components. Therefore, it is important to study the causes of damage to the broken components.
In this study, the damaged fastener system components, such as intermediate pad, serrated washer, angled guide plate and rail pad, were interviewed and discussed with experts who has surpassing experiences in trackwork by investigating civil structures, alignment, and trackwork detail design, materials of fastener system components, procedure of construction and assembly to find out why the broken situation happened, and then try to propose the possible/available solutions. And the conclusions in this study, the root causes of fastener components broken situations, in external effect is caused by the sharp curve with a small radius of the civil viaduct alignment design, and in internal effect is caused by the high longitudinal creep resistance of the rail, so those reasons caused the out of expecting damage to fastener system components.
In the process of studying related research literature, the references at home of trackwork fastener system are hardly found in theses, dissertations and journals as well. Therefore, the conclusion of this study not only is expected to be used to reference by trackwork (incl. fastener system components) design and installation of following trackwork projects but provide suggestions to alternatives for components maintenance or replacement and an effective reference on the relevant study of trackwork fastener system in the future.
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