非均质地形条件下公路网均衡布局

Highway Network Equilibrium Layout under the Condition of Heterogeneous Terrain

基于公路网均衡布局的概念,根据泰尔指数和数据包络分析的公路网布局均衡性评价的结果得出不均衡系数,对传统公路网布局的重要度进行修正。运用万有引力定律及不均衡系数重要度确定两个节点之间的吸引强度。根据节点间的吸引强度来决定节点间所需的交通供给强度,进行公路网的布局。以云南省公路网布局为例进行分析,结果表明:昆明的节点重要度最大(为3.17),不均衡系数为0.38,得到的不均衡系数重要度也是最大(为2.05);玉溪的节点重要度为1.19,不均衡系数最小(为-0.57),表示现状公路网布局结构已超区域经济发展,使不均衡系数重要度降为0.48。布局结果表明昭通与昆明间的公路网布局长度最长,两者联系紧密,而迪庆用于对内交流的公路网较少,说明迪庆今后在公路网布局建设方面,应重点发展与邻省以及对外交流的公路网。

Based on the concept of highway network equilibrium layout, the unbalanced coefficient is sis, then the importance d uneven coefficient of importance are applied to determine the attract strength between two nodes. The attract strength between nodes is taken as basis to determine the required traffic supply strength between nodes intensity and arrange the highway network layout, and the highway network layout in Yunnan province has been taken as study object. The result shows that. the importance of Kunming is the highest as 3. 17, the highest unbalanced coefficient is 0. 38, its importance of unbalanced coefficient is the highest as 2. 05; the importance of Yuxi is 1.19, the unbalanced coefficient is the smallest as-0.57, which means the structure of current highway network layout has exceed the development of regional economic, makes the unbalanced coefficient of importance reduced to 0. 48. Layout results show that the length of highway network layout between Zhaotong and Kunming is the longest, they are linked closely, but there are less highway network for internal communication in Diqing, which means that Diqing＇s construction of highway network layout in the future should focus on developing the highway network with neighboring provinces and the outside exchange network.