城际铁路地下车站平坡设置研究

Study on setting fl at slope of intercity railway underground station

城际铁路地下车站普遍采用2‰的坡段以解决纵向排水问题,但设置2‰的纵坡不仅增加车站土建施工难度,还对后期的设备安装、装修等带来诸多不便。文章根据相关设计规范,结合线路平面条件、车站布置、隧道断面等,分析城际铁路与地铁纵断面设计异同、地下车站设置平坡对排水产生的影响,并提出解决方案。研究认为,城际铁路地下车站内排水可通过垫层找坡、底板找坡等方式解决,隧道内排水可通过沟底找坡方式解决。端头为直线的地下车站可设置为平坡;端头为曲线的地下车站不宜设置为平坡,需根据缓和曲线、竖曲线、道岔等参数计算确定。

In order to solve the problem of longitudinal drainage,2‰gradient section is widely used in the underground station of intercity railway,but the setting of 2‰longitudinal slope not only increases the difficulty of civil construction of the station,but also brings a lot of inconvenience to the later equipment installation and decoration.According to the relevant design specifications,based on the line plane conditions,station layout,tunnel section,etc.,this paper analyzes the design similarities and differences between the intercity railway and the subway vertical section,and the impact of the setting of the flat slope of the underground station on the drainage,and puts forward solutions.The research shows that the drainage in the underground station of intercity railway can be solved by the way of smoothing slope and bottom plate slope,and the drainage in the tunnel can be solved by the way of trench bottom slope.The underground station with straight end can be set as fl at slope,the underground station with curve end should not be set as fl at slope,which should be determined based on the parameters of transitional curve,vertical curve,turnout,etc.