平原地区铁路隧道两端路堑排水方案研究

受制于外部因素,平原地区铁路隧道越来越多,隧道两端的排水问题较为突出,结合某铁路工程3座地处平原地区的隧道工程,充分考虑隧道所处的地形特点、气候特征、地质条件、隧道施工方法和线路纵坡等因素,发散思想,提出"提升雨水后向隧道周边自然沟渠排水、向隧道对侧自然沟渠排水、向大气排水、采取工程措施防止雨水进入"等多种排水新理念,综合各个专业的功能需求和设计手段,逐一研究和比选,最终分别选择"暗涵向隧道对侧自然沟渠排水,明暗结合排水沟渠向隧道对侧排水,向大气排水"3种工程形式,解决工程面临的排水功能需求和投资控制两大矛盾。

Study on Drainage Scheme at Both Ends of Railway Tunnels in Plain Areas

There are more and more railway tunnels built in plain areas due to the restriction of external factors,and drainage problems at both ends of the tunnels become more prominent. With reference of three railway tunnel projects in plain areas,the paper takes into full consideration of terrain features,climatic characteristics, geological conditions, construction methods and longitudinal gradients of tunnels,presents a variety of new concepts of drainage like"drainage to natural ditches surrounding the tunnel and ditches on the other side of the tunnel after raising rainwater level,drainage to the atmosphere by evaporation,keeping rainwater out of the tunnel by engineering measures". It synthesizes functional requirements and design means of all disciplines,studies and compares different schemes and finally chooses three project types,which are"drainageto natural ditches on the other side of the tunnel through buried culvert,drainage to the other side of the tunnel through open drain and under-drain,and drainage to the atmosphere by evaporation ",which resolves the two major contradictions of functional requirements of drainage and investment control.