基于边界效应的城市群路网一体化评价方法——以京津冀城市群为例

Evaluation Method of Urban Agglomeration Road Network Integration based on Boundary Effect:Taking Beijing-Tianjin-Hebei Urban Agglomeration as An Example

城市群作为推动区域协同发展的重要空间载体,是支撑经济发展的重要增长极,构建完善的路网体系有利于提高区域发展支撑能力。为探究行政边界对路网的屏蔽效应以及相邻城市路网一体化程度,以京津冀城市群为例,从微观角度研究行政边界处路网密度规律,结合边界效应距离衰减定律,迭代分析行政边界两侧缓冲区内路网分布规律,并构建了路网密度扩散模型、路网一体化评价模型,量化分析行政边界对路网的屏蔽效应以及相邻城市路网一体化程度,为城市群路网一体化的研究提供新思路,进一步推动城市群路网一体化建设。

As an important spatial carrier to promote regional coordinated development,urban agglomeration is an important growth pole to support economic development,and constructing a scientific road network is conducive to improving the supporting capacity of regional development.To explore the shielding effect of administrative boundary on road network and the impact of adjacent urban road network integration,taking Beijing-Tianjin-Hebei urban agglomeration in China as an example,the rules of road network density at administrative boundary is studied from micro point of view,combining with law of distance attenuation of boundary effects,the distribution rules of road networks on both sides of the administrative boundary buffer zone was iteratively analyzed.And the density diffusion model of road network and evaluation model of road network integration are constructed to quantitatively analyze the shielding effect of administrative boundary on road network and the degree of road network integration of adjacent cities,which provides new ideas for the research of urban agglomeration road network integration and further promotes the construction of urban agglomeration road network integration.