在我国今天的铁路工程建设中,有几项十分重要的原则需要贯彻,就是: 1.建设中的社会主义协作; 2.工程决策中的唯物主义; 3.工程经济; 4.技术改进; 5.选线设计理论的改进。为了试图把工程设计原则建立在理论基础上,兹提出综合优化设计的概念。设计线的综合优化设计原理包括一系列数学模型,其中有一些设计变量分别代表影响铁路经济很大的一些因素。利用优化方法解这些数学函数,即可同时得到各种铁路标准的最优设计值。此项设计过程可以节省大量的时间,而且设计结果比旧设计方法远为经济合理。这项综合优化的研究是带有国际意义的。作者迄今还没有看到在其它地方有这样的建议。 In our country’s railway construction today, there are several very important principles that need to be implemented: 1. Socialist cooperation in construction; 2. Materialism in engineering decision-making; 3. Engineering economy; 4. Technical improvement; Improvement of Route Selection Design Theory. In order to try to establish the principle of engineering design on the basis of theory, we put forward the concept of integrated optimization design. The design principles of a comprehensive optimization design line include a series of mathematical models, some of which design variables represent the great influence on the railway economy, a number of factors. Using optimization methods to solve these mathematical functions, the optimal design values ​​of various railway standards can be obtained at the same time. This design process can save a lot of time, and the design results far more economical than the old design method. This comprehensive and optimized study is of international significance. The authors have so far not seen such advice elsewhere.