低地板有轨电车盾构隧道疏散平台设置研究

Research on Evacuation Platform Setting in Shield Tunnel for Low-floor Streetcar

为了解决低地板有轨电车盾构隧道疏散平台设置困难、易侵限的问题,提出一种新的疏散平台设置方法,有效解决因曲线地段车辆设备限界加宽而需要增大盾构隧道直径的问题。通过对盾构隧道区间限界影响因素进行分析,发现随着车辆地板面高度的降低,疏散平台有效安装空间变小,尤其在曲线地段限界难以满足要求。针对此问题提出疏散平台曲线内侧设置和行车方向左侧设置两种解决方案,并对两种方案特点进行了对比,行车方向曲线内侧设置方案优于行车方向左侧设置方案,可以大大节约建设成本。该方案在佛山市南海区低地板有轨电车项目中进行应用,验证了该设置方法的有效性。

In order to solve the problems in setting evacuation platform in the shield tunnel for low-floor streetcar, a new method is put forward. This method can meet the requirement for increasing tunnel diameter where vehicle equipment gauge is to be widened in curve section. According to the analysis of the influencing factors of shield tunnel gauge, it＇s found that the effective installation space of the evacuation platform becomes smaller with the reduction of vehicle floor height, and the gauge can not meet the requirements especially in the curve section. Two solutions are proposed and the characteristics of the two are compared. The method of setting inside the curve is superior to the conventional method of the setting on the left side of driving direction, and it can save a lot of construction cost. The effectiveness of the proposed method is verified by the application of the Foshan low-floor streetcar project.