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研究目的:CRTSⅡ型板式无砟轨道桥上底座板纵向连续后,其上产生的温度力和制动力等将影响到路基上的轨道结构,在桥台后一定长度路基上设置摩擦板和端刺,可以将连续底座板上产生的温度力和制动力等传至路基内,不再影响路基上的轨道结构。通过本研究,提出一个既能确保路基上轨道结构安全稳定、又能节省工程投资的摩擦板和端刺方案。研究结论:采用倒T型端刺,小端刺下基床表层和基床底层深度范围路基填筑级配碎石掺水泥、大端刺两端各5 m宽按1∶2刷坡范围路基填筑级配碎石掺水泥方案,加荷载后,端刺最大纵向水平位移小于3 mm,能够确保路基上轨道结构安全稳定;且工程造价较原京津城际铁路摩擦板端刺方案经济。
Research purposes: The temperature and braking force on the base plate of CRTS Ⅱ slab track bridge will affect the track structure of the embankment after it is longitudinally continuous, and the friction plate and the prongs , The temperature force and braking force generated on the continuous base plate can be transmitted to the embankment no longer affect the track structure on the roadbed. Through this research, a friction plate and end-piercing scheme which not only can ensure the safety and stability of the track structure on the subgrade but also save the engineering investment is proposed. Research conclusions: Using inverted T-shaped spines, small end spines under the surface of the bedbed and the depth of the bedrock bottom subgrade filled graded gravel mixed with cement, big end spines at both ends of each 5 m wide by 1: 2 brush slope range of subgrade Filling graded gravel mixed with cement program, plus the load, the maximum vertical displacement of the end of the horizontal displacement of less than 3 mm, to ensure the safety and stability of the track structure on the roadbed; and the cost of the original Beijing-Tianjin intercity railway friction plate end barbed program economy.