Acceptance method and device for static long wave irregularity of railway bridge track

Abstract

The invention discloses an acceptance method and device for static long wave irregularity of a railway bridge track. The method comprises the following steps: acquiring a first chord measurement value acquired on a straight road section and a corresponding first vehicle body acceleration; calculating a second chord measurement value of the target road section and a second vehicle body acceleration when the vehicle body passes through the target road section according to the design longitudinal section and the temperature deformation curve of the target road section on the railway bridge; based on a preset vehicle body acceleration limit value, the first vehicle body acceleration and the second vehicle body acceleration, calculating a vehicle body acceleration deviation limit value on the target road section and a chord measurement value deviation limit value corresponding to the vehicle body acceleration deviation limit value; superposing the first chord measurement value, the second chord measurement value and the chord measurement value deviation limit value to obtain a chord measurement value limit value of the target road section; and evaluating the track irregularity of the railway bridge target road section according to the chord measurement value limit value. The track static long wave irregularity on the large-span bridge can be better evaluated, so that the actual state of the railway on the bridge can be more accurately reflected.

Description

technical field [0001] The invention relates to the technical field of railway tracks, in particular to a method and device for checking and accepting static long-wave irregularity of railway bridge tracks. Background technique [0002] Track irregularity refers to the deviation between the actual line position of the left and right rails and the design line position, and its wavelength, amplitude and period characteristics have an important impact on the safety of vehicle operation and ride comfort. The railway track laid on the bridge is affected by various factors such as bridge construction deviation, temperature deformation, and second-phase dead load, resulting in a large geometric deviation during the laying of the track, which will also affect the results of the detection of track irregularities . The current detection method for long-wave irregularity of the track is used to detect the irregularity of the track on the bridge, which usually cannot meet the static ac...

AI Technical Summary

Problems solved by technology

The railway track laid on the bridge is affected by various factors such as the construction deviation of the bridge, temperature deformation, and the second-phase dead load, resulting in a large geometric deviation during the laying of the track, which will also affect the results of the detection of track irregularities

The current detection method for long-wave irregularity of the track is used to detect the irregularity of the track on the bridge, which usually cannot meet the static acceptance criteria. However, the deformation of long-span cable-stayed bridges, suspension bridges, arch bridges and suspension composite bridges is dominated by long waves. Although Evaluation according to the current inspection methods and indicators cannot meet the static acceptance criteria, but the dynamic track irregularity and vehicle response detected by the comprehensive inspection vehicle are in good condition, indicating that the track irregularity acceptance method based on the current static acceptance criteria is difficult to reflect the line on the bridge. actual state

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