双车道公路弯坡组合路段行车轨迹特性研究

发布时间：2019-05-16 08:44

【摘要】：为研究双车道公路弯坡组合路段行车轨迹特性,以大型车和小型车作为研究对象,选取某山区公路的基本型曲线和S型曲线路段进行了现场试验。采用特征断面法及摄像法,获取了1 700组"前轮-后轮"数据,以轨迹交叉面积和轨迹横向偏移量表征行车轨迹特性,并运用刚体运动理论和博弈论对数据进行分析。分析结果表明:行车轨迹在基本型曲线的ZH~HY断面、HZ断面及S型曲线的HZ_1/ZH_2断面、HZ_2断面高频相交;当曲线半径大于临界值时,基本型曲线和S型曲线在QZ断面弯道外侧的轨迹偏移量最大,内侧的轨迹横向偏移量最小;S型曲线中第二曲线的轨迹偏移量受前后曲线半径组合影响较大,在设计时应尽量使两个方向有一致的行驶轨迹。
[Abstract]:In order to study the driving trajectory characteristics of the curved slope combination section of two-lane highway, the field tests were carried out on the basic curve and S-curve section of a mountain highway, taking the large vehicle and the small vehicle as the research object. By using feature section method and camera method, 1 700 groups of "front wheel and rear wheel" data are obtained, and the driving trajectory characteristics are characterized by trajectory cross area and trajectory lateral offset scale, and the data are analyzed by rigid body motion theory and game theory. The results show that the driving trajectory intersects at high frequency in the ZH~HY section of the basic curve, the HZ_1/ZH_2 section of the HZ section and the HZ_1/ZH_2 section of the S-shaped curve. When the radius of the curve is larger than the critical value, the trajectory offset of the basic curve and the S-shaped curve on the outside of the bend of QZ section is the largest, and the lateral offset of the trajectory on the inside is the smallest. The trajectory offset of the second curve in the S-shaped curve is greatly affected by the combination of the radius of the front and rear curves. In the design, we should try our best to make the two directions have the same driving trajectory.
【作者单位】：重庆交通大学土木工程学院;
【基金】：国家自然科学基金,项目编号51278514 国家科技支撑计划项目专题,项目编号2009BAG13A02
【分类号】：U491.21

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