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Deformation control method of high-pier and long-span bridge track of railway

A deformation control and bridge technology, applied in the direction of instrumentation, geometric CAD, calculation, etc., can solve the problems of increased line complexity, increased bridge ratio, lack of high-pier and long-span bridge track deformation control methods, etc., to reduce research work problems, The effect of improving efficiency and improving the safety of train traffic

Inactive Publication Date: 2017-04-26
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages in the prior art that the proportion of bridges increases continuously during the construction of rail transit, the complexity of the lines increases, and the prior art lacks the deficiencies in the deformation control method of the high-pier and large-span bridge track, and provides a long-span bridge track deformation control method

Method used

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  • Deformation control method of high-pier and long-span bridge track of railway
  • Deformation control method of high-pier and long-span bridge track of railway
  • Deformation control method of high-pier and long-span bridge track of railway

Examples

Experimental program
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Effect test

Embodiment 1

[0089] Research on the seamless line of ballasted rigid frame bridge with high piers and long spans,

[0090] Rigid-frame bridges are commonly used in high-pier and long-span structures when crossing mountains, canyons, and large rivers. Taking the Chahe Super Bridge on the Changkun Railway as an example, the seamlessness of this type of bridge is studied. The general situation of the bridge is as follows: Changkun Passenger Dedicated Chahe Super Bridge is located in the section from Changkun Passenger Dedicated Yuping to Kunming. (36+56+36)m continuous beam. The general layout of the Chahe Bridge is as follows figure 1 shown.

[0091] Table 5 below summarizes the design values ​​of the longitudinal stiffness of the piers of the Chahe Super Bridge.

[0092] Table 5 Summary of Longitudinal Stiffness of Chahe Bridge Pier Abutments

[0093]

[0094] 2. Common seamless line calculation

[0095] (1) Telescopic working condition

[0096] According to the "Code for Design of...

Embodiment 2

[0144] Calculation of ballast track seamless route of Xingfuyuan Bridge.

[0145] General situation of the bridge: Xingfuyuan double-line extra-large bridge span layout is 8×32m simply supported beam + (48+5×80+48)m continuous rigid frame + 5×32m simply supported beam, with a total of 20 spans, 19 piers and 2 bridges. The numbers of piers from the Guiyang side to the Guangzhou side are 1#, 2#...21#. The whole bridge is located on the circular curve of R9000m. The highest rail temperature is 59.5°C, the lowest rail temperature is -4.2°C, the design locked rail temperature is 32±5°C, the maximum temperature difference can reach 59.5-(32-5)=32.5°C when heating up, and the maximum temperature difference can reach 32+5- when cooling down (-4.2) = 42.2°C. The height of the piers and abutments is shown in Table 8, and the span layout of the main bridge is shown in Figure 8 shown.

[0146] Table 8 Pier height table

[0147]

[0148] 2. Wind load effect

[0149] Due to the hi...

Embodiment 3

[0164] 5.5 Research on Stiffness of Continuous Girder Bridge Pier

[0165] 5.5.1 Calculation and control standards for track calculation of seamless lines on bridges

[0166] The main calculation content of the seamless line on the bridge includes the strength of the rail, the stability of the line, the rapid relative displacement of the beam and rail under the braking condition of the train, and the fracture value.

[0167] 5.5.5.1 Rail strength

[0168] Rail strength checking is an important task in the design and calculation of seamless lines. Its purpose is to ensure that the maximum working stress of the rail section must be within the allowable stress range of the rail. The rail strength checking formula is:

[0169]

[0170] where σ s In order to consider the rail yield strength of welded joint quality; K is the safety factor, which is generally taken as 1.0 or 1.3, considering the influence of factors such as rail fatigue stress, residual stress, and welded joint...

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Abstract

The invention discloses a deformation control method of a high-pier and long-span bridge track of a railway. A high-pier and long-span bridge model is analyzed through a finite element method, and whether track deformation meets the specification requirements or not is calculated under a wind load, a temperature change, a driving condition and / or a braking condition. According to the deformation control method of the high-pier and long-span bridge track of the railway, track deformation on a high-pier and long-span bridge is actively researched and analyzed for the problem of shortage of research on the track deformation of an existing long-span bridge; a good method for controlling the track deformation is provided; the problem of the track deformation can be significantly improved; and the traffic security and smoothness of a train are improved.

Description

technical field [0001] The invention relates to a method for controlling deformation of a track, in particular to a method for controlling deformation of a track of a high-pier long-span bridge, which belongs to the field of rail traffic control, is a control method for realizing safe and stable operation of rail traffic, and belongs to the management and control of transportation rails field. Background technique [0002] In recent years, with the rapid development of railway construction and the advancement of seamless line technology on bridges, the proportion of bridges in the line has gradually increased, and the line inevitably needs to cross special areas such as traffic arteries, steep canyons, and wide rivers. , in order to meet the requirements of the line across these sections, a large number of high-pier long-span bridges (such as high-pier large-span continuous rigid frame bridges, long-connected high-pier continuous girder bridges and multi-span high-pier simpl...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 陈列鄢勇陈天地王平李锐袁明潘自立叶九发王聪
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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