Method for calculating rail elevation adjustment amount of settlement over-limit section of high-speed railway bridge

Abstract

The invention discloses a method for calculating the rail elevation adjustment amount of a settlement over-limit section of a high-speed railway bridge. The normed index limit requirements of the lineshape, the differential settlement and the bevel of the settlement over-limit section of the high-speed railway bridge are comprehensively considered, the objective control function of the rail elevation adjustment effect is established, and the rail elevation adjustment amounts that can improve the smoothness of the rail to the maximum are searched and calculated within the limit range of adjustable amounts of the repair measures. The method includes the following steps: S1, obtaining engineering information of the settlement over-limit section; S2, setting requirements of the rail elevationadjustment effect; S3, setting adjustable limit values of the repair measures; S4, establishing the objective function of the rail adjustment effect; and S5, searching and calculating an optimal adjustment amount plan. According to the invention, searching and calculation are conducted within the adjustable range, the smoothness of the line is improved to the maximum while the normed index limitrequirements are met, and the method can be widely used for the calculation of the rail elevation adjustment amount of the settlement over-limit section of the high-speed railway bridge.

Description

technical field [0001] The invention relates to a calculation method for a track elevation adjustment amount of a high-speed railway bridge settlement overrun section, and belongs to the field of high-speed railway bridge settlement overrun control. Background technique [0002] Affected by factors such as regional land subsidence, construction precipitation along the line, and piled loads, the track settlement of some high-speed railway bridge sections exceeds the limit of the design specification, which seriously affects the rapid, stable and safe operation of the high-speed railway. Therefore, it is necessary to comprehensively adjust the bridge support. Seats, track slabs, fasteners and other measures are used to control the subsidence overrun section to restore the normal operation of the high-speed railway. Since the amount of adjustment that can be realized by various current measures is limited, the bridge section with severe settlement cannot be restored to the init...

AI Technical Summary

Problems solved by technology

Since the amount of adjustment that can be realized by various current measures is limited, the bridge section with severe settlement cannot be restored to the initial design elevation. Therefore, it is necessary to comprehensively consider the alignment of the entire section to calculate a reasonable adjustment amount of the track elevation, which meets the requirements of design and maintenance. Under the premise of key indicators such as differential settlement and knuckle angle in the specification, the smoothness of the track can be restored to the maximum extent

[0003] At present, in the project, the adjustment amount of the track elevation at the bridge support is mainly determined one by one based on experience. There is no fixed adjustment standard, and it needs to be manually corrected and checked repeatedly. The work efficiency is low, and the line alignment of the entire section cannot be considered comprehensively. It is not suitable for the calculation of track elevation adjustment in a large-scale settlement overrun area

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