基于GIS的铁路走向方案研究

为避免在铁路走向方案选定过程中遗漏有价值的方案,并减少工作量、加快比选速度,同时定量把握铁路走向与沿线社会经济发展的耦合关系,以华北平原某拟建城际铁路为例,在描述铁路走向选择问题的基础上,利用潜能模型表示铁路从不同地区经过时对周边城市的影响,运用GIS栅格算法得到铁路走向的最优方案。从所得方案可以看出,铁路走向既要短直又应经过更多城市,铁路应优先顾及更大的城市,铁路走向选择应考虑到铁路不能经过的城市的需求,铁路应引入城市核心区域。该方法排除了铁路走向方案研究过程中人为主观因素的干扰,无需事先选定比较方案即可快速得到最优方案。

Research on Railway Route Alignment Schemes Based on GIS

In order to avoid missing valuable schemes, reduce workload, give impetus to the selection process and quantitatively grasp the coupling relationship between railway route alignment and socio-economic development to area along railway line during the time of selection of railway alignment schemes, taking a proposed intercity railway in the North China Plain as an example, on the basis of describing the choice of railway route alignment, by using potential model to express the impact of railways passing through different regions on the surrounding cities, using GIS grid algorithm, the optimal schemes for railway route alignment was established. The result shows that the railway should be designed not only to be short and direct, but also pass through more cities. Larger cities should be given more priority to own railway. The transport demand of cities which cannot be gone through by this railway should be taken into account. Railways should be led into urban core areas. This method eliminates the interference of subjective factors in the research of railway route alignment scheme. The best scheme can be obtained quickly without selecting the comparison plan in advance.