Newsletter 高速鐵路簡訊 . 交通部高速鐵路工程局
軌道設備介紹:認識軌道加勁軌 Rail Equipment Introduction: Understanding the Auxiliary Rail
進/出機廠線之銜接段的加勁軌。

機場捷運在進出維修機廠的銜接路段分屬不同類型的道床配置,由於自正線進入維修機廠的軌床為非道碴道床,機廠區內為道碴道床,兩者之軌道勁度差異較大,一般在兩種不同道床之軌道銜接處,會視軌道勁度之差異及需求,採許特別方式處理,設置「加勁軌」增加道碴端的軌道勁度,緩衝及漸變兩端之勁度,即為工程常用的方式之一,除避免道碴道床過度沉陷外,亦可降低此區的道床維修養護成本。
機場捷運之加勁軌設計係在運行軌之間增加二根UIC60鋼軌,長度約23公尺(道碴段18公尺,非道碴段5公尺),並採Pandrol 扣件鎖固。此外,為了增加軌枕之橫向穩定,並設置軌枕錨定版,加強其道床結構穩定。

The track bed configurations of the TIAA MRT rail at the connecting sections of the maintenance depot are different. The section from the main line entering the maintenance depot is non-ballast track and the track inside the depot is ballast track which results in significant track stiffness difference between the two tracks. Generally at the track convergence of the two different tracks will be implemented with a special method depending on the differences and requirements of the track stiffness. Setting the “auxiliary rail” to increase the track stiffness of the ballast end and to cushion and buffer the stiffness at both ends is one of the commonly used methods. Not only avoiding over-subsidence of the ballast track, this method can reduce the maintenance cost of track bed in this area as well.
The auxiliary rail of the TIAA MRT System is designed as adding two UIC60 rails in between operating rails for approximately 23 meters (18 meters in the ballast track section and 5 in non-ballast track section) and adopted Pandrol fastenings to fix the rails. In addition, in order to increase lateral stability of the sleeper, the sleeper anchoring plate was also installed to strengthen its track bed structure stability.

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