由于工期的要求,青藏铁路新增西格段于2005年10月开工,由于工期紧迫,必须进行冬期施工。在工期紧迫的情况下,为了保证西格线的施工质量,本文对西格线的混凝土从冻融机理、各种影响因素等方面进行了大量冻融试验研究,为指导现场混凝土施工提供了可靠数据。 Due to the duration of the project, the new segment of the Xigaze of the Qinghai-Tibet Railway started in October 2005 and due to the tight schedule, the winter construction is required. In the case of tight schedule, in order to ensure the construction quality of the Sieg route, this paper carried out a large number of freeze-thaw experiments on the freeze-thaw mechanism and various influencing factors of concrete in the Xig line, which provided a reliable basis for guiding the on-site concrete construction data.