Knowledge

In high-altitude and low-temperature environments, materials such as elastic clips, bolts, and gauge blocks are prone to decreased toughness and incre

The bridge beam expands and contracts with temperature, and the relative displacement between the rail and the bridge near the beam end is significant

The gap between the elastic rail and the gauge block directly affects the rail positioning accuracy. An excessively large gap will cause gauge fluctua

Temperature force is the enormous internal force generated in the rail under temperature changes. It must be properly matched with the longitudinal re

Clamping pressure is a core indicator for ensuring a tight fit between the rail and sleeper and providing lateral restraint. Insufficient clamping pre

Track clip fracture is a high-risk defect in rail systems. On-site identification of the fracture type, cause, and degree of danger is crucial to clas

Under the influence of temperature and load, the ballastless track base and track plate undergo micro-deformation, warping, and displacement, which al

In arid and sandy areas, sand and gravel particles continuously erode and abrade the surface of fasteners under the influence of wind and wheels, whil

Bolt threads are prone to wear, stripping, deformation, and corrosion under installation, vibration, and rust conditions. Determining whether they can

Rail joint misalignment refers to the vertical or horizontal misalignment of the rail ends. When a wheel passes over it, a strong impact is generated,

Under long-term loads, rail pads undergo irreversible compressive deformation, known as compression permanent deformation. This leads to increased fas

If there is an angle deviation such as forward tilting, backward tilting, or skew during spring clip installation, it will directly change the force p