公路路线比选中关于桥隧比例因素的探讨

The Discussion on the Factors of Bridge and Tunnel Ratio in the Highway Route Selection

在公路总体及路线设计阶段,设计人员往往认为"桥隧比例越高的路线方案工程造价越高",分析了当前公路桥隧比例不断攀升的原因,并结合工程实例说明"桥隧比例与工程造价固然存在一定关系,但也存在桥隧比例高的路线方案不一定工程造价就高"。旨在提醒设计者,在确定路线方案时,应以详细比选数据为依据,而不能仅仅根据定性经验分析,从而遗漏有价值的路线方案。

This paper analyzed the reasons of the rising proportion of the current highway bridge and tunnel ratio. Combined with the engineering examples, it showed that there was a certain relationship between the bridge and tunnel ratio and the engineering cost, but the route scheme with a high bridge and tunnel ratio, whose engineering cost wasn't necessarily high. It also reminded the designers that when determining the route scheme,the designers should be based on the detailed comparison of the data, and not only according to the qualitative experience analysis, and thus missing the valuable route scheme.