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公路工程困难程度定量的确定是公路界最为关注的问题之一。文章根据公路建设多年的实践经验,得出公路工程困难程度主要由海拔高程、地形坡度、地面切割密度、地面切割深度、岩土特性、植被类型及覆盖状况6个指标组成。且运用模糊综合评判计算权重的方法确定各指标的权重,对各困难度指数进行分级后,采用基于GIS的计算机制图方法,编制了1:200万公路工程困难度指数图。
The quantitative determination of the degree of difficulty in highway engineering is one of the most concerned issues in the highway community. According to years of practical experience in highway construction, the paper concludes that the degree of difficulty of highway engineering is mainly composed of six indexes, including elevation, topography gradient, ground cutting density, ground cutting depth, geotechnical characteristics, vegetation types and coverage status. The weight of each index is determined by the method of fuzzy comprehensive judgment. After grading the difficulty index, GIS-based computer graphics method is used to compile the index of difficulty index of 1: 2 million highway project.