高速铁路对沿线城市可达性及经济联系的影响——以汉宜高速铁路为例

Impact of high-speed railway on accessibility and economic linkage of cities along the railway——a case study of Hanyi High-speed Railway

针对我国欠缺研究东西方向、尤其是中西部欠发达地区高速铁路的状况,以汉宜高速铁路为例,选取加权平均旅行时间分析城市可达性空间格局变化,运用时间距离引力模型测量城市经济联系强度,并依据经济联系隶属度确定城市经济联系方向.结果表明,汉宜高铁促进江汉平原沿线城市可达性水平显著提高,实现地理时空有效收敛;推动城市经济联系强度显著增长,有效减缓城市间联系受距离衰减的作用;促使城市的主要经济联系方向从"中心城市指向性"向"地域相邻指向性"转变,空间近邻效应越来越明显.通过对汉宜高铁建成前后的对比分析,明晰高速铁路建设的空间经济意义,廓清城市的空间发展导向,为区域国土空间开发提供参考.

Considering the lack of research on high-speed railway of the east-west direction, especially in developing regions of mid-western China,the Hanyi High-speed Railway of Jianghan Plain was taken as a case in the present study. The weighted mean travel times was used as indicators within the travel time cost gravity model to calculate the cities accessibility and economic linkage intensity among the 8 cities. Then,the economic linkage subordination degree was employed to identify the economic linkage direction of the cities. Conclusions are drawn as follows： completed Hanyi High-speed Railway im- prove urban accessibility standards significantly, achieving effective convergence of geographic space and time;The economic linkage intensity is elevated remarkably, successfully relieving distance attenuation in contact between cities;The main economic linkage direction is conforming from ＂center city directivity＂ to ＂area adjacent directivity＂,making space neighbor effect more and more prominent. By comparative analysis of Hanyi High-speed Railway before and after accomplishment, spatial economic significance for construction of high-speed Railway becomes clear and spatial development orientation is clarified,providing a reference for the development of regional land space.