论文部分内容阅读
1.前言在强烈要求消除噪音公害以前,跨度40m以上的铁路桥主要采用钢桥,上下部结构加在一起的工程费也是经济的,在技术上也是正常的。
1. Introduction Before strongly demanding to eliminate noise nuisance, the railway bridges with a span of more than 40m mainly use steel bridges. The construction cost of the upper and lower structures together is also economical and technically normal.