1前言新加坡快运轨道系统(SMRT)采用了3种类型的轨道体系:高架桥上一般使用在碎石道碴上铺设传统木枕;混凝土枕铺设于隧道或地铁的连续混凝土板上(这里是指固定板式轨道类型,简记为FT,如图1);浮置板式轨道(简记为FST,如图2)由支承于弹性垫上的不连续混凝土构件组成,多用于对地 1 INTRODUCTION There are three types of orbital systems used by Singapore Rapid Transit Orbiter System (SMRT): conventional wooden pillows are laid on ballast ballasses on viaducts; concrete sleepers are laid on continuous concrete slabs of tunnels or subways (in this case, Track type, abbreviated as FT, as shown in Figure 1); floating plate track (abbreviated as FST, shown in Figure 2) is composed of discontinuous concrete members supported on the elastic pad,