非均质地形条件下公路网起伏修正系数研究

Research on Fluctuant Correction Coefficient of Road Network under Non-uniform Terrain Conditions

为了对非均质地形区域内存在地形差异的各子区域公路网进行客观对比评价,进而对公路网投资建设进行科学决策,需要用地形起伏修正系数测算公路网等效里程。在界定非均质地形和地形起伏修正系数概念的基础上,提出坡度和地形起伏修正系数确定的方法,明确路线和节点选取的原则,借助Google Earth软件进行数据采集,利用统计学原理给出了数据样本容量的计算方法,提出运用最小二乘法构建不同地形条件、不同技术等级公路平均坡度和地形起伏修正系数的关系模型。最后以具有代表性的非均质地形区域的陕西省、云南省为对象,采集数据、构建模型,并进行对比分析,据此为非均质地形条件下起伏修正系数的量化提供借鉴。

In order to make contrast evaluation objectively of each sub region of road network which exists terrain diversity in the area of non-uniform terrain, and then to make scientific policy of construction investment of road network, fluctuant correction coefficient of road network is used to calculate the equivalent mileage of road network. Based on confirming the concept of non-uniform terrain and fluctuant correction coefficient, in this paper the determination method of correction coefficient of slope and fluctuant terrain is proposed, the selection principal of route and node is made clear, Google earth software is used to implement data acquisition, the calculation method of data sample size is put forward using the principle of statistics and the model of average slope and correction coefficient of fluctuant terrain in diverse terrain conditions and highway with different classes is established using least square method. At last, taking representative example of Shaanxi province and Yunnan province where have area of non-uniform terrain, data is collected and model is established, comparison and evaluation are conducted based on which reference of quantification of fluctuant correction coefficient under non-uniform terrain conditions can be provided.