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近年来在经济发展和科学技术进步的推动下,高速铁路得到了较大的发展,目前高速铁路的轨道结构主要包括有砟轨道和无砟轨道两种类型,考虑到轨道结构本身的工程建设费用和养护维修费用,通过费用总和的计算,得出比较经济的轨道型式为无砟轨道,而且其使用寿命、性能和安全性等方面优势也比较突出,所以无砟轨道在高速铁路中得到较广泛的应用,但实践中人们发现无砟轨道在应用中破坏修整的难度较大,而且对扣件的弹性要求较高,为降低无砟轨道破坏的概率,满足无砟轨道结构要求,人们尝试优化无砟轨道所应用的自密实混凝土配合比。在此背景下,本文针对高速铁路无砟轨道自密实混凝土配合比设计及应用问题展开研究,为高速铁路无砟轨道施工提供借鉴。
In recent years, thanks to economic development and advances in science and technology, the development of high-speed railway has been greatly accelerated. At present, the orbital structure of high-speed railway mainly includes two types of ballasted or ballastless track. Considering the construction cost of the track structure itself And the cost of maintenance and repair. Through the calculation of the sum of the expenses, it is concluded that the more economical orbit type is the ballastless track, and its advantages in service life, performance and safety are also prominent. Therefore, the ballastless track is widely used in high-speed railway However, in practice, it has been found that ballastless track is more difficult to disrupt dressing in application and has higher requirements on the flexibility of fasteners. In order to reduce the probability of failure of ballastless track and meet the requirements of ballastless track structure, people try to optimize Ballastless track application of self-compacting concrete mix. Against this background, this paper studies the mix design and application of self-compacting concrete for ballastless track of high-speed railway and provides reference for the construction of ballastless track of high-speed railway.