中国与澳大利亚公路几何设计主要技术指标对比分析

结合斯里兰卡南部高速公路设计实例,阐述中国及澳大利亚两国规范关于公路几何设计指标选取的异同。通过对公路基本标准、平曲线半径、超高、加宽、缓和曲线、纵断面纵坡、竖曲线以及线形组合设计的对比研究表明:澳洲规范对于净空和视距要求高,竖曲线最小半径较大,其余指标限值比我国有不同程度降低。差异的主要原因是客观环境下参数取值以及设计理念、方法有别,相对于我国规范严谨性和操作性强的特点,澳洲规范总体要求比较灵活和宽松,设计者可有更大的发挥空间。

Comparison and Analysis of Key Technical Standards for Highway Geometric Design between China and Australia

Based on the case of the design of Southern Expressway in Sri Lanka,the similarities and differences in the application of geometric design specifications between China and Australia are stated.The comparison and analysis of basic criteria, horizontal curve radius, superelevation, pavement widening,vertical gradient,vertical curve and alignment coordination involved in highway design indicate that the requirements for clearance and sight distance are higher and the minimum radius of vertical curve is bigger as stipulated by Australia,but the others are lower comparatively. The differences lie in the selection of parameters under the objective environments and design concepts and approaches. Compared with the addresses of Chinese standards in strictness and practicability,Australian standard is more flexible to grant designers with more space for design.