论文部分内容阅读
交通部在81年5月颁发的《公路工程技术标准》(以后简称新《标准》)施行以后,由于新《标准》的条文比较简要,在勘测设计中,还必须按新《标准》规定的原则,对某些条文作出具体补充,方便于使用。我省大部分是高原山区,山区公路如何结合平面、横面搞好纵断面设计,是一个最敏感的问题。在新《标准》第3.0.18条规定用合成坡来代替旧《标准》平曲线在最大采纵坡上进行折减的办法,似乎对设计纵坡要求降低了,但是新《标准》第3.0.17条仍规定了
Since the implementation of the “Highway Engineering Standard” (hereinafter referred to as the “new” Standard) issued by the Ministry of Communications in May, 81, the provisions of the new “Standard” are relatively brief. In survey and design, the provisions of the new “Standard” Principle, some provisions of the specific make-up, easy to use. Most of our province is the plateau mountain, mountain road how to combine the plane, cross-section do a good job of vertical section design, is the most sensitive issue. The reduction of the maximum standard slope with a composite grade to replace the old “standard” flat curve in Section 3.0.18 of the new Standard seems to have reduced the requirement for design of longitudinal grade. However, the new Standard No. 3.0 Article 17 still provides