Page 60 - 捷運技術 第39期

54 陳輝雄 吳岱庭 曹政忠 龔昶榮 浮動式道床型式選用之評析

Analysis & Evaluation of Floating Slab Track Option

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Hui-Hsiung Chen Dai-Tieng Wu Cheng-Chung Tsao Chang-Lung Kung 4
Abstract

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 mass-
spring 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.

Keywords：vibration, noise, floating slab track (FST), rubber bearing, coil spring bearing