软土地层减振式地下车站结构综合研究

Comprehensive Analysis on Vibration-reducing Subway Station in Soft Soil

随着地铁网络密集化,地铁振动对周围环境的影响不容忽视。以上海轨道交通十号线二期工程国帆路站为工程背景,采用数值仿真计算,对比研究叠合墙式、复合墙式、离壁墙式三种结构方案在地铁车站减振效果方面的优劣,并计算三种结构方案的材料用量和工程造价。结果表明:采用离壁墙式车站方案,地铁产生的环境振动的加速度反应峰值和Z振级最小,复合墙式车站次之,叠合墙式车站最大。离壁墙式车站结构在造价上约比叠合墙式高13.8%。在城市中心对振动要求严格的区域,离壁墙式车站具有较大应用价值。

With the development of intensive metro networks, the impacts of subway vibration on the surrounding environment cannot be ignored. This paper takes the Guofan Road Station of Shanghai Metro Line 10 as the engineering background, and uses numerical simulation to compare the advantages and disadvantages of the three structural schemes of laminated wall, composite wall and separation wall in the vibration reduction effect of metro stations. The material usage and engineering cost of the three structural schemes was calculated. The results show that acceleration response peak and Z-vibration level of environmental vibration induced by metro are the smallest, composite wall station is the second, and laminated wall station is the largest. The separated-wall station structure is 13.8% higher in cost than the laminated-wall structure. In the urban center area, especially in the area with high vibration requirements.