京津冀交通路网结构特征及其演变的分形刻画

龙玉清; 陈彦光

doi:10.13959/j.issn.1003-2398.2019.04.014

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人文地理 ›› 2019, Vol. 34 ›› Issue (4) : 115-125. DOI: 10.13959/j.issn.1003-2398.2019.04.014

交通

京津冀交通路网结构特征及其演变的分形刻画

龙玉清, 陈彦光

作者信息 +

FRACTAL CHARACTERIZATION OF STRUCTURAL EVOLUTION OF BEIJING, TIANJIN AND HEBEI TRANSPORTATION NETWORK

LONG Yu-qing, CHEN Yan-guang

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摘要

交通一体化是京津冀协同发展的基础和前提，合理的交通网络结构对提升城市群整体效能意义重大。本文基于1995—2030年多源交通路网数据，运用分形思想，研究京津冀以城市群为节点体系的交通路网空间结构特征及演化趋势。主要结论如下：①京津冀高等级路网仍有一定扩展潜力，交通网络整体等级结构尚不稳定，未达到一种优化的分形递阶状态。②各级路网空间分布具有自仿射特征，但各向异性扩展强度正在逐渐减弱，城镇化和交通一体化战略的实施正在促进各级路网逐渐向自相似的结构一体化方向演化。③交通路网空间结构演化与城镇用地结构不同步，可能与系统所处城镇化发展阶段有关。④高等级路网分维演化服从次数大于1的logistic模型，按照规划预期，各级路网空间发育将相继在2040年前后达到饱和；但按照规划设计高速公路建设将过度饱和，未来应及时调整规划。

Abstract

The traffic integration is the basis of collaborative development of Beijing-Tianjin-Hebei urban system, and a improved structure of transportation network is of great importance to improving the efficiency of Beijing-Tianjin-Hebei. Based on the multi-source road data between 1995 and 2030, fractal theory is employed to analyze the spatial pattern and structure characteristics of transportation network in Beijing-TianjinHebei urban system, and further reveal the future evolution. The main results are as below:1) The transportation network of Beijing-Tianjin-Hebei shows variances in structure hierarchy. The space filling degree of low-level transportation networks are higher, while the high-level roads still have potential to grow. 2) The spatial distribution of transportation networks take on a self-affinity pattern, but the trend of anisotropy expansion decreases with time. 3) The fractal dimension growth of higher-level roads obey logistic models with exponent more than 1, suggesting that the policy interference has a greater influence than self-organizing power. The main conclusions are as follows:First, the hierarchical structure of transportation network in Beijing-Tianjin-Hebei has been unstable, and it has not reached an optimized fractal hierarchy. Second, the self-affinity of road networks is too strong, which is different from the trend of land structure evolution. This is probably related to the developing stage of Beijing-Tianjin-Hebei urban system. Third, due to the urbanization process and the implementation of transportation integration strategy, road networks at all levels are growing towards self-similar and integrative structure.

导出引用

龙玉清, 陈彦光. 京津冀交通路网结构特征及其演变的分形刻画[J]. 人文地理. 2019, 34(4): 115-125 https://doi.org/10.13959/j.issn.1003-2398.2019.04.014

LONG Yu-qing, CHEN Yan-guang. FRACTAL CHARACTERIZATION OF STRUCTURAL EVOLUTION OF BEIJING, TIANJIN AND HEBEI TRANSPORTATION NETWORK[J]. HUMAN GEOGRAPHY. 2019, 34(4): 115-125 https://doi.org/10.13959/j.issn.1003-2398.2019.04.014

中图分类号： K901

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