山区高速公路长陡纵坡设计理念及案例分析

一直以来，已建成的山区高速公路长陡纵坡都存在着安全隐患。分析纵坡设计指标的形成原理，研究长陡纵坡段汽车的性能、运行安全性、道路通行能力、汽车油耗等，充分认识长陡纵坡设计中存在的安全隐患，有助于设计者在山区高速公路设计时尽量避免出现长陡纵坡。如果受条件限制，不得已布设长大纵坡时，必须采取综合治理措施，以最大限度地减少恶性事故的发生。

Design Conception and Case Analysis of Long and Steep Longitudinal Slope of Expressway in Mountainous Areas

Long and steep longitudinal slope of expressway in mountainous areas has always been of latent security problems. Analyzing the forming principle of design indexes of longitudinal slope, studying the performance, operation security, road capacity and gasoline consumption of automobiles in long and steep longitudinal slopes and realizing the latent security problems existed in design sufficiently can help designers avoid long and steep longitudinal slopes when designing the expressway in mountainous areas. If the condition is restricted and the long and steep longitudinal slope has to be set then comprehensive treatment measures must be adopted to reduce the serious accidents furthest.