基于GIS的津保铁路对沿线城市可达性影响分析

Analysis on Influence of Tianjin-Baoding Railway on Accessibility of Adjacent Cities based on GIS

为分析铁路对区域的影响,以津保铁路为例,在北京、天津、河北中南部、德州等地区既有路网基础上,考虑道路速度等级,兼顾地形坡度、水体对道路的影响,运用GIS栅格算法,生成津保铁路通车前和通车后天津到达北京、冀中南各地基于时间可达性扩散图及变化幅度图。对津保铁路通车前、后效果进行对比分析,发现津保铁路通车后天津到达津保沿线地区的时间大幅缩短,影响范围沿京广高速铁路向南延伸,距离越远时间节省幅度越大,同时得出铁路能力的发挥受到既有路网特性及车站位置的影响。

In order to analyze the influence of railways on the areas, taking Tianjin-Baoding railway as an example, on the basis of existing railway network in Beijing, Tianjin, Dezhou and the central- south area of Hebei, taking into account both the road speed level and the influence of terrain slope and water on road, by using GIS grid algorithm, the scatter diagram and rangeability diagram based on time accessibility for Beijing-Tianjin, and each area in central south of Hebei before and after Tianjin-Baoding railway opening to traffic are established. This paper makes comparative analyses on the effect of Tianjin-Baoding railway before and after operation, and finds the time from Tianjin to the areas along Tianjin-Baoding railway is shortened after the operation, the influence scope is extended southward along Beijing-Guangzhou high-speed railway, and the father the distance is, the more the time is saved. At the same time, the result is achieved, which means the railway capacity is influenced by the characteristics of existing traffic network and the station location.