捷運系統為都會區帶來交通之便捷與舒適，惟捷運系統接近或穿越鄰近建物時，產生之 振動與噪音亦招來民眾抗議，為消弭民怨，浮動式道床軌道（FLOATING SLAB TRACK 簡 稱 FST）乃應運而生。世界各捷運系統紛紛使用浮動式道床軌道以解決振動與噪音問題，臺 北捷運系統亦自新蘆線軌道標開始嘗試使用浮動式道床軌道以為因應，並於後續信義線及松 山線納入該系統。 浮動式道床減振抑噪之功能主要經由質量-彈簧原理（mass-spring，質量大小與彈性支 承墊系統）而決定，其中質量由列車、軌道及道床版提供，吸振的主要元件則為浮動式道床 之支承墊系統，其材質必須具有高使用壽年，一般常用之材質為橡膠、橡膠混合物、金屬彈 簧、玻璃纖維等；目前世界各地多以橡膠支承墊及金屬彈簧為主流，本文即以新蘆線軌道標 廠商選用之天然橡膠支承墊迷你道版之FST，與信義線、松山線軌道標廠商傾向採用之金屬 彈簧支承墊長道版之FST，針對二者型式及選用評析作一概要說明。

Taipei MRT provides the Taipei metropolitan area with convenient and comfortable transportation. However, with MRT lines being constructed beneath or close to business and residential buildings, occupants of those buildings always complain and protest against vibration and noise created by passing trains. To reduce the impact on neighboring buildings and minimize residents' complaints, the floating slab track (FST) system was created. In fact, the FST system has already been used in overseas MRT projects to solve vibration and noise problems. The FST system was applied to Taipei MRT Xinzhuang and Luzhou lines for the first time in a domestic construction project and is to be put in place on the Xinyi and Songshan lines as well. The function of attenuating vibration and noise through the use of FST is based on the massspring principle; the mass is provided by the trains, rails and slabs. The main facility to resist vibration is the floating slab track's bearing system which is made of long-life materials. Typically, the materials are rubber, rubber compound, coil spring bearing, fiberglass-reinforced plastic (FRP), etc. Nowadays the majority of manufacturers world-wide use rubber bearings and coil spring bearings. This paper gives a short analysis and evaluation of the FST system using natural rubber bearings and a mini-slab implemented by the Xinzhuang and Luzhou lines' trackwork contractor, and the FSTs with coil spring bearings proposed by the contractor that has been awarded the trackwork contract for the Songshan line.