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对工程项目进行经济评价,目的在于从中选取最优方案。而评价经济效益的方法,一般则是由计算指标来表达的,但适用的指标种类很多,如投资回收期、投资效果系数、净现值及内部收益率等。因此,确定合理的计算指标就显得尤为重要。目前,公路工程通常采用的经济评价方法有净现值法、最小开支法及投产第一年回收率法等。其中净现值计算法应用最广泛,并用内部收益率、效益成本比、净现值及投资回收期四种
Economic evaluation of the project, the purpose is to choose the best solution. The method of evaluating economic benefits is generally expressed by calculating indicators. However, there are many suitable indicators such as the payback period, investment effect coefficient, net present value and internal rate of return. Therefore, to determine a reasonable calculation of the index is particularly important. Currently, the economic evaluation methods commonly used in highway engineering are the net present value method, the minimum expenditure method and the first-year recovery rate method. Among them, the NPV method is the most widely used, and the internal rate of return, cost-benefit ratio, net present value and payback period