山区高速公路曲线超高与汽车行驶安全

山区高速公路的建设带动了我国山区经济的发展,加强了地区间的经济联系。但其运营的安全性也比较突出,山区公路事故率一直较高,重、特大事故多。通过对我国山区高速公路车辆运行情况的实际调查和分析,探讨了路面超高与汽车行驶安全性的关系,阐述了汽车在曲线上行驶的特性,分析了一般情况和超载情况下汽车轮胎受力的大小,计算了不同路面超高和不同超载情况下汽车内、外侧轮胎受力的不均衡度。计算结果表明,路面超高越大,越容易引起车辆(特别是超载车辆)轮胎受力不均匀,严重的时候引起车胎爆裂,甚至翻车,对车辆的行驶安全不利。最后,结合《公路路线设计规范》(JTG D 20-2006)和道路交通安全法,对改善山区公路车辆行驶安全性提出了几点建议。

Curve Superelevation of Expressway in Mountainous Region and Safety Running of Vehicles

The constructions of expressways in mountainous region promote the economical development of these regions,enhance the communications of each region.While,the traffic safety of highway is also very important,there are more accidents in these years,and some are heavy accidents.Through investigating and analysis,the relationship between the curve superelevation and the safety running of vehicles is discussed.The movement rules of vehicles when they are running on the curve are explained.In the condition of superelevation and overloading,unbalanced stress of the vehicle's tires are made,and the stress of tires on both side of the vehicle is calculated.The results indicate that vehicles running on large superelevation road incline to generate tire bursting,even side tumbling is token place,that is bad for traffic safety.Therefor,some proposes and suggestions about the traffic safety based on Design Specification for Highway Route(JTG D20-2006) and Road Traffic safety Law are put forword.