基于地形因素的干线公路网布局方法  

Layout Method of Trunk Highway Network based on Topographic Factors

作　　者：冯钧泰 钱勇生[1] 曾俊伟[1] 魏谞婷 杨民安 FENG Jun-tai;QIAN Yong-sheng;ZENG Jun-wei;WEI Xu-ting;YANG Min-an(School of Traffic and Transportation,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Architecture and Urban Planning,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学交通运输学院,兰州市730070 [2]兰州交通大学建筑与城市规划学院,兰州市730070

出　　处：《公路》2025年第3期223-229,共7页Highway

基　　金：甘肃省教育厅“双一流”科研重点项目,项目编号GSSYLXM-04;甘肃省重点研发计划-工业类,项目编号21YF5GA052;2021年度甘肃高等学校产业支撑计划,项目编号2021CYZC-60;甘肃省哲学社会科学规划项目,项目编号2021YB058;甘肃省高等学校创新基金项目,项目编号2020B-113。

摘　　要：我国复杂多样的地形是影响人口、经济和交通运输发展的重要因素。为克服传统节点重要度方法未考虑地形因素的缺陷,提出了一种基于地形因素的干线公路网布局方法。该方法添加考虑区域地形优劣与路网合理性的路网地形因素指标对传统模型进行改进,并且考虑地形对道路长度、通行时间和建设成本的影响,利用成本距离法改进传统路段重要度指标,再与prim算法和改进后的空间连通圆理论相结合,先构建干线路网主骨架后按路途远近灵活调整,确定最终布局。以兰州及周边区域为例分析表明:(1)改进节点重要度指标通过综合考虑地形因素,可以更全面地反映节点的重要程度;(2)布局结果与现状路网对比,节点连通度提升40%,路网密度提高11.8%,能切实起到优化干线公路网布局的作用。The complex and diverse topography in China is an important factor affecting the development of population,economy and transportation.In order to overcome the defect of traditional node importance method that does not consider terrain factors,a layout method of trunk highway network based on terrain factors is proposed.In this method,the traditional model is improved by adding road network topographic factor indexes that consider the advantages and disadvantages of regional terrain and the rationality of road network,and considering the impact of terrain on road length,travel time and construction cost,the cost distance method is used to improve the traditional road section importance index,and then combined with the prim algorithm and the improved spatial connected circle theory.The main skeleton of the dry line network is constructed first,and the final layout is adjusted flexibly according to the distance of the road.Taking Lanzhou and its surrounding areas as an example,the results show that:(1)improving the node importance index can reflect the node importance more comprehensively by considering terrain factors,and(2)compared with the current road network,the node connectivity is increased by 40%and the road network density by 11.8%,which can effectively optimize the layout of the trunk road network.

关 键 词：交通工程 路网布局 节点重要度 地形因素 PRIM算法 空间连通圆 

分 类 号：U491.1[交通运输工程—交通运输规划与管理]