桥梁下部经济指标测算方法研究

Study on Estimate Method of Economic Cost Index of Bridge Substructure

在铁路项目设计过程中,经常需要通过方案比较对不同方案进行比选最终确定最优方案,投资是影响方案比较结果的重要因素。受限于比较精度,如何准确计算不同方案间桥梁高度不同引起的桥梁下部指标差异是方案比较过程中常见的问题。本文提出三种不同的桥梁下部指标的测算方法,并结合某铁路工程,分析了这三种方法的适用情况。

In the process of railway project design,it is often necessary to compare and select different schemes through scheme comparison,and finally determine the optimal scheme.Investment is an important factor affecting the result of scheme comparison.Limited by the comparison accuracy,how to accurately calculate the index difference of the bridge substructure caused by different bridge heights between different schemes is a common problem in the process of scheme comparison.This paper puts forward three different estimate methods of bridge substructure index,and analyzes the application of these three methods combined with a railway project.