The urban rail transit project penetrates through busy urban streets, hospitals, schools, ancient buildings, opera houses, studios, etc., which inevitably produces vibration and noise. It is one of the social hazards that affect people's quality of life and work environment. The ballast bed structure of urban rail transit is varied, including concrete ballast bed, gravel ballast bed, ballast bed slab, T sleeper, etc., wherein the floating slab ballast bed is an ideal damping noise reduction structure form in vibration reduction effect and performance all over the world at present, which is widely used in urban rail transit project. The characteristics of floating slab ballast bed is introduced in the paper, the construction process of steel spring floating slab ballast bed is expounded, and key procedures in the construction process that should be noted are introduced in details. The cost of steel spring floating slab ballast bed is analyzed from two aspects of rail paving project and ballast bed paving project. Key factors affecting the cost of steel spring floating slab ballast beds are further analyzed. Finally, precautions are introduced. Steel spring floating slab ballast bed has expensive cost. How to improve the construction process, develop alternative product, and reduce engineering cost should be studied by related professionals urgently.%城市轨道交通工程穿越繁华市区街道、医院、学校、古建筑、歌剧院和摄影棚等地段,不可避免地产生振动和噪声,成为影响人们生活质量和工作环境的社会公害之一.城市轨道交通的道床结构多种多样,包括混凝土道床、碎石道床、道床板和T型轨枕等,其中浮置板道床是目前世界上减振效果和性能较理想的减振降噪结构形式,在城市轨道交通工程中被广泛应用.文章介绍了浮置板道床的特点,对钢弹簧浮置板道床的施工工艺进行了阐述,并且在施工工艺中对需要注意的关键工序进行了详细介绍,从铺轨工程和铺道床工程两个方面对钢弹簧浮置板道床的造价进行了分析,对影响钢弹簧浮置板道床造价的关键因素进行进一步分析,最后对需要注意的问题做了阐述.钢弹簧浮置板道床工程造价偏高,如何改进其施工工艺、研发替代产品,降低工程造价,是相关专业人士亟需研究的问题.
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