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实地调查了贵州省山区低等级公路线形状况,采集了山区四级公路平曲线半径、纵坡、竖曲线半径等主要线形指标。统计分析了上述各指标的分布规律,对比分析了各指标所能达到JTG B01-2003《公路工程技术标准》相关指标的情况。在此基础上对山区低等级公路线形组合进行了研究,分析了不同线形指标条件下,平纵组合路段的分布规律。分析结果表明:既有山区四级公路大部分路段可满足相应的设计标准,但公路线形连续性较差、圆曲线和纵坡指标取值较低、不利行车安全的平纵组合路段比例较高。
Field survey of the mountainous areas in Guizhou Province linear low-grade road conditions, the acquisition of the fourth grade mountain highway flat curve radius, longitudinal slope, vertical curve radius and other major linear indicators. Statistical analysis of the distribution of the above indicators, comparative analysis of the indicators can reach JTG B01-2003 “highway engineering standards” related to the situation. On this basis, the linear combination of mountainous low-grade highways is studied, and the distribution rules of the combined vertical and vertical segments are analyzed under different linear indexes. The analysis results show that most of the four sections of existing mountainous areas can meet the corresponding design standards, but the continuity of the road is poor, the values of the circular curve and longitudinal slope are lower, and the proportion of flat-vertical combined sections with higher driving safety is higher .