Line horizontal alignment reconstruction design method on railway bridge

A technology for railway bridges and lines, which is used in calculations, special data processing applications, instruments, etc., can solve the problems of circular curve radius, large deviation of easing curve, difficult to control errors, and inability to adapt to high-speed railway maintenance and repair work.

Active Publication Date: 2019-09-13
BEIJING JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation practice shows that the two methods in the existing technology are difficult to control the error, and the reconstructed circular curve radius and transition curve length deviate greatly from the current situation, and the calculation workload is large
Because the high-speed railway strictly controls the track irregularity, the rope straightening method and the deflection method cannot be used for the maintenance and repair work of the high-speed railway.

Method used

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  • Line horizontal alignment reconstruction design method on railway bridge
  • Line horizontal alignment reconstruction design method on railway bridge
  • Line horizontal alignment reconstruction design method on railway bridge

Examples

Experimental program
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Effect test

Embodiment 1

[0041] figure 1 The flow chart of the design method for line plane alignment reconstruction on the railway bridge provided by this embodiment, figure 2 Schematic diagram of the design principle of line plane alignment reconstruction on the railway bridge, refer to figure 1 and figure 2 , the method includes:

[0042] S1 uses a total station to measure the coordinates of the center line of the track on the railway bridge, and divides the straight and curved sections of the measured line.

[0043] The plane alignment of the ballast track on the bridge is generally simple curve, and the line adopts the combination of "straight line-curve-straight line". In the plane reconstruction design of the existing line on the bridge, the total station is used to measure the coordinates of the center line of the track on the railway bridge, and the line plane is reconstructed by using the center line of the line. Carry out the identification of line plane feature points.

[0044] Comb...

Embodiment 2

[0149] This embodiment is an embodiment of simulation using the method for reconstructing the plane line shape of the railway bridge of the present invention. In order to verify the rationality of the reconstruction method proposed by the present invention, typical work points are selected to carry out the plane reconstruction design of the line. The total length of the line is 1.94km. According to the line plane constraint requirements given in TB10098-2017 (railway line design specification), the line should meet the following constraint requirements:

[0150] 1. Minimum length of circular curve or straight line: 80m;

[0151] 2. Minimum radius of circular curve: 400m;

[0152] 3. Minimum transition curve length: 40m, rounded to 1m accuracy;

[0153] 4. The allocated amount of the designated measuring point is less than the allowable value of the allocated amount (there is no such requirement in Embodiment 2).

[0154] The following table 1 is the coordinates of the actual...

Embodiment 3

[0167] This embodiment is an embodiment of simulation using the method for designing line plane alignment reconstruction on a railway bridge according to the present invention, and a typical work point 2 is selected for line plane reconstruction design. The total length of the line is 2.52km, and the entire line is laid on the bridge. The line contains a curve. The first three constraints of the line are the same as those in the reconstruction example 2. The curve part of the line is affected by the building limit, and the measurement points on the curve are required to be less than 50mm. .

[0168] Among them, Table 5 is the original coordinates of the measuring points measured by the total station, Table 6 is the reconstructed line dial, the bold part is the dial of the measuring point in the curve part, Table 7 is the reconstructed line curve elements, and Table 8 is reconstructed curvilinear coordinates, Figure 19 Curvature map of the line before and after reconstruction...

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Abstract

The invention provides a line horizontal alignment reconstruction design method on a railway bridge. The line horizontal alignment reconstruction design method comprises the following steps: measuringcoordinates of a line track center line on the railway bridge by adopting a total station, and dividing straight line and curve sections in the measured line; fitting the straight line sections to determine the slope of the straight line, so as to determine the deflection angle of each curve section; and based on the deflection angles of the curve sections, establishing a reconstruction curve bytaking the length of the easement curve and the radius of the circular curve as variables, taking a dial value at a measuring point as a constraint function, and taking the minimum sum of squares of the dial value as a target, and performing optimization to obtain a reconstructed horizontal alignment. By means of the line horizontal alignment reconstruction design method, the reasonable seamless line horizontal alignment on the bridge can be accurately and effectively reconstructed.

Description

technical field [0001] The invention relates to the field of railway engineering design, in particular to a method for reconstructing the plane line shape of a track on a railway bridge. Background technique [0002] After the line on the railway bridge is put into operation, due to the complex interaction between beam-rail and wheel-rail and the influence of various other external forces, the center of the track (that is, the center line of the line) will gradually deviate from the original design line, and the center line of the line will become It is no longer smooth, and it will threaten driving safety in severe cases. Therefore, it needs to be regularly reconstructed and maintained. [0003] Traditional railway reconfiguration survey and design methods mainly include rope straightening method and deflection angle method. Rope rectification method is a method of curve rectification. It uses the relationship between the measured curve sine and the calculated curve sine, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F17/24G06Q10/00
CPCG06Q10/20G06F30/20G06F40/174
Inventor 蔡小培刘万里冯鸿雪常文浩侯博文高亮彭华
Owner BEIJING JIAOTONG UNIV
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