摘要: 分析了多年冻土的特性以及多年冻土地区路基工程和桥涵基础工程所采取的设计原则，指出了施工工艺的正确选择是解决路基施工的技术关键，以及桥涵基础中的明挖基础施工技术进行了研究和总结，另外也对多年冻土地区的混凝土的施工工艺作了详细论述。关键词： 多年冻土铁路 施工技术Abstract: In this thesis， it is discussed such as the characteristics of permafrost， primary engineering geology questions， designs principle， style of the roadbed and foundation under bridge engneering. The practice proves that it is important to choose of construction technics in the roadbed engineering. it is made study of conventional excavation of cu
