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以某典型山区高速公路隧道群为研究对象,采用雷达测速仪和Metro Count 5600,分别在隧道群不同位置采集车辆速度,建立了车辆运行速度与采集点位置的函数关系,分析了隧道群路段不同位置运行速度的变化规律。计算了各地点的加速度干扰,以加速度相对于位置的变化率表示路段的危险程度,分析了隧道群路段不同位置的危险程度。研究结果表明:在隧道入口段和隧道之间的连接段处,上行方向小型车和大型车危险性系数平均值分别为11.72和5.77,下行方向分别为19.71和8.53,危险性相对较高;其他采集点的危险性系数接近0,危险性相对较低;小型车的危险性系数远高于大型车。
Taking a typical mountainous expressway tunnel group as the research object, the radar velocimeter and Metro Count 5600 were used to collect the vehicle speed at different positions of the tunnel group. The function of the vehicle running speed and the collection point was established. Location of the operating speed of the law of change. The acceleration disturbance at each point is calculated. The dangerous degree of the section is expressed by the rate of change of acceleration relative to the position, and the dangerous degree of different sections of tunnel section is analyzed. The results show that at the connecting section between tunnel entrance and tunnel, the average risk coefficient for small cars and large cars in the up direction are 11.72 and 5.77, respectively, and the downward direction is 19.71 and 8.53, respectively, and the risk is relatively high. Other The risk coefficient of the collection point is close to 0, the risk is relatively low; the danger coefficient of the small car is much higher than that of the large car.