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环境保护是人类在进入２１世纪时所面临的重要问题之一。为使铁路建设与环境保护和谐发展，有必要在铁路选线设计中进行周密的环境考虑，进而用环境因子来进行铁路选线方案比选。本文从铁路建设项目对环境影响内容出发，总结出９个主要评价目标，并对目标进行量化，最终提出了铁路选线方案比选的多目标系统模糊优选方法，并通过了实例的检验。此外，本文还提出了铁路绿色设计的新概念。
Environmental protection is one of the most important issues facing mankind in the 21st century. For the harmonious development of railway construction and environmental protection, it is necessary to carry out careful environmental considerations in the design of railway route selection, and further use environmental factors to conduct comparison and selection of railway route selection plans. Based on the environmental impact of railway construction projects, this paper summarizes nine major evaluation objectives and quantifies the objectives. Finally, a fuzzy optimization method of multi-objective system for railway route selection and comparison is put forward and examples are given. In addition, this paper also proposed a new concept of railway green design.