基于利用城市既有桥梁的新建有轨电车方案比选研究

Selection and comparison of new tram schemes based on existing urban flyover bridges

有轨电车占用桥面空间时,既有桥梁需通过改造利用或拆除新建来保证有轨电车和社会车辆的通行。通过提出3种方案,研究新建有轨电车工程如何利用既有城市道路桥梁。研究结果表明:(1)能否利用既有桥梁需先进行验算,若不满足规范要求,可对桥梁进行加固处理,使其为有轨电车所利用;如果既有桥梁改造利用与拆除新建费用、工期相差不大,可优先考虑拆除新建。(2)有轨电车可采用绕行方案避免对城市道路桥梁产生干扰,其可行性需根据工程费用、实施难易程度等因素综合考虑确定。

When trams occupy fl yover bridge deck space,existing flyover bridges need to be renovated,utilized or demolished to ensure the passage of trams and social vehicles.By putting forward 3 schemes,this paper studies how to make use of existing urban roads and bridges in the new tramway project.The results show that:(1)first check out whether the existing bridge can be used,if it does not meet the requirements of the code,the bridge can be strengthened to make it used by tramways.If the cost and duration of the reconstruction and utilization of the existing bridge are not different from that of the demolition and construction,the demolition and construction of the existing bridge will be given priority.(2)The tramway can avoid disturbance to urban roads and bridges by bypass scheme.Its feasibility should be determined by comprehensive consideration of engineering cost,implementation diffi culty and other factors.