研究目的：扣件的正确设计和科学安装是提高铁路钢轨线性的有效保证。轨道准确稳定的线性是高速列车安全运营的前提。通过对某高速铁路用CRTS II型轨道板生产情况的调查,在存板区发现有CRTSⅡ型轨道板预组装的无砟有挡肩扣件松动、螺栓上浮等现象,对此进行分析,结合传统有砟轨道的扣件安装,提出一些既能发挥扣件功能、又能保证施工质量的建议。
研究结论：通过分析与研究得出如下结论:将单头螺栓改为双头螺栓,并经过防水处理后,可以杜绝水浸入预埋套管的途径,有效防止水结冰融化造成螺栓上浮的病害;改变扣件的弹性胶垫螺栓孔的形状和位置,在每一个扣件上增加一个螺母,可以起到止水的作用;变更后的轨道空间位置特性(线路的平面曲线、竖曲线、空间坐标)将更加稳定,为列车安全运行奠定了基础。
Research purposes：The correct design and scientific installation of the fastening are essential to enhancing the linearity of railway track. The accurate and stable track linearity is the premise of guaranteeing the traffic safety of high-speed train. In investigating the production situation of CRTSⅡ track slab used for high-speed railway, it was found some fastenings used for CRTSⅡ slab were loose and the bolts floated. In this paper, the analysis is made for the problems mentioned above and some proposals to making good use of fastening and guaranteeing the construction quality are made in combination with the installation of the traditional fastening used for ballast track.
Research conclusions：From the analysis and research, it is concluded the double ended bolt substitutes for single ended bolt and after the waterproof treatment of the double ended bolt, water can not penetrate into the bushing, so the bolt floating caused by thawing the frozen water can be prevented effectively. It is necessary to change the shape and position of the hole of the bolt with elastic rubber cushion and one nut is added to each fastening for waterproof. After these remedies, the spatial position characteristics of the track, such as plain curve, vertical curve and spatial coordinate, are more stable.
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