摘要
Abstract
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" drainage to 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.关键词
平原地区/铁路隧道/排水方案研究Key words
Plain area/Railway tunnel/Study on drainage scheme分类
交通工程
