Status

System

Variables

Status evaluation variables for heavy haul railway line

Rail geometry

Geometry system

Left/right elevation, gauge, left/right rail alignment, level, warp, curvature, superelevation, rail quality indicators, change rate of rail quality variables, change rate of curvature, carbody verticality, horizontal acceleration, curve radius

Rail structure status

Rail system

Spalling and chipping, top surface scratch, squat damage, corrugation wear, flow of rail head or working edge, rail joint malocclusion on the top or inner side, rail joint gap, rail vertical wear, rail side wear, tread scratch, rail head wear, scaling, rail head horizontal crack, rail head vertical crack, rail head transverse damage, rail-web transition horizontal crack, rail web horizontal crack, rail web oblique crack, rail web vertical split, wire guide hole crack, screw hole transverse/longitudinal crack, rail foot transverse/longitudinal crack, abnormal light band

Connecting part system

Fastener missing, fastener skewed, backing plate missing, fastener buried; rubber gasket skewed, broken, deformed, severely worn; spike heads falling off, severely rusted

Sleeper system

Breakage, split, corrosion, sleeper deflection, sleeper chipping, sleeper crack, number of sleepers, sleeper spacing

Subgrade ballast system

Thickness, ballast bed smudgy, ballast pulverization, ballast collapse, ballast bed smudging, ballast bed deformation, ballast bed compaction, subgrade bed subsidence and settlement, landslide, collapse and rockfall, weathering and spalling, sinkhole, subgrade bed mud pumping, bank erosion, flooded subgrade, poor drainage, frost damage, sand damage, snow damage, debris flow

Rail operating status

Operating

system

Total mass of passing trains