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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 objectively compare and evaluate the sub-regional road network in the heterogeneous terrain area and make scientific decision-making on the construction of highway network, we need to use the terrain undulation correction coefficient to calculate the equivalent mileage of the highway network. On the basis of defining the concept of non-homogeneous topography and topographic relief coefficient, a method for determining the coefficient of slope and topographic relief is put forward, and the principle of selecting routes and nodes is proposed. Data are collected by using Google Earth software, and the statistical principle is given The method of calculating the data sample size, the least square method is proposed to construct the relationship model between the different topographic conditions and the average slope of the roadway with different technical grades and the topographic relief coefficient. Lastly, taking Shaanxi and Yunnan Provinces as representative heterogeneous terrain areas as examples, the data were collected, and the models were constructed and compared. The results provide reference for the quantification of the undulation correction coefficient in heterogeneous terrain.