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通过在高速铁路正线上开展长期温度荷载下的原位监测和列车制动荷载下的实车试验,以及运用ABAQUS有限元软件的数值计算,进行高速铁路桥上CRTSⅡ型板式无砟轨道倒T型和Π型台后锚固体系的端刺结构在温度力和制动力作用下的受力变形特性研究。结果表明:在降温和升温过程中,端刺结构周围土体压应力较大值主要出现在主端刺摩擦板的下部和桥台方向首个小端刺的位置,端刺结构变形主要以顶部弯拉为主,整体纵向变形较小;在紧急制动荷载的作用下,钢轨纵向应力、端刺纵向位移均随着轴重的增加而明显增大,但端刺纵向位移绝对值较小,与温度荷载作用相比,紧急制动荷载作用对端刺结构的影响小。
Through the in-situ monitoring of long-term temperature load on the high-speed railway line and the actual vehicle test under train braking load, and the numerical calculation using ABAQUS finite element software, the CRTS Ⅱ slab ballastless track inverted T Force and Deformation Characteristics of the Stab Structure of the Type Π and Type Π Anchors after Ambient and Dynamic Braking. The results show that in the process of cooling and warming, the larger compressive stress of soil around the end piercing structure occurs mainly in the lower part of the main end friction plate and the first small end pier in the abutment direction. The deformation of the end piercing structure is mainly at the top The longitudinal longitudinal stress of the rail and the longitudinal displacement of the stabs both increase with the increase of the axle load, but the absolute value of the longitudinal displacement of the stabs is smaller, Compared with the temperature load, the effect of emergency brake load on the stab structure is small.