山区高速公路紧急避险车道驶入角研究

避险车道驶入角的大小对避险车道安全性有着重要影响,是影响避险车道功能发挥的关键性因素。通过分析失控车辆在转弯时的受力情况及运行特征,得出了失控车辆驶入避险车道时的横向倾覆条件和横向滑移条件,保证失控车辆的行驶稳定性;并在此基础之上,提出了避险车道驶入角的设置方法,给出了在不同渐变段长度下避险车道驶入角的最大限值。最后,通过工程实例进行了验证性分析,说明所给出的避险车道驶入角限值具有合理性。

Research on the Angle to Truck Escape Ramp of Mountainous Expressway

the angle to truck escape ramp is the key factor to affect the function of truck escape ramp, it has an important impact on the safety of truck escape ramp. This paper established the conditions of transverse overturning and lateral slip when brake failure vehicles draw into truck escape ramp to ensure the stability by analyzing force condition and operating characteristic on the curve. Based on these works, this paper puts forward the method of setting the angle to truck escape ramp, and gives the maximum limit at different transition section lengths, finally, the maximum limit angle to truck escape ramp was demonstrated reasonable by engineering examples.