Method for designing jointless track of long and large bridge girder longitudinal butt plate type ballastless track for high-speed railway

A technology of slab ballastless track and high-speed railway, which is applied in bridge construction, bridges, tracks, etc., can solve the problems of less research and achieve the effect of detailed model and perfect structure

Inactive Publication Date: 2012-11-21
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many achievements have been made in the research of ballastless track and seamless track on bridges, there are few related researches on the new structure of ballastless track seamless track with longitudinal connecting slabs for long bridges of high-speed railways.

Method used

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  • Method for designing jointless track of long and large bridge girder longitudinal butt plate type ballastless track for high-speed railway
  • Method for designing jointless track of long and large bridge girder longitudinal butt plate type ballastless track for high-speed railway
  • Method for designing jointless track of long and large bridge girder longitudinal butt plate type ballastless track for high-speed railway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] This part compares and analyzes the main temperature force and displacement calculation results when the friction coefficient of the sliding layer on the bridge is 0.25, 0.30 and 0.35. Comparison of rail force and rail displacement under different conditions of friction coefficient of sliding layer on bridge Figure 23 with Figure 24 Shown. The zero point of the abscissa is the junction between the abutment and one side of the bridge, the same below. Table 1 and Table 2 compare the main temperature forces and displacement calculation results under different friction coefficients of sliding layers on the bridge.

[0101] Table 1: Comparison of calculation results of main forces under different friction coefficients of sliding layers on bridges

[0102]

[0103] Table 2: Comparison of main displacement calculation results under different friction coefficients of sliding layers on bridges

[0104]

[0105] According to the analysis of the above calculation results, the smaller...

Embodiment 2

[0107] This part compares and analyzes the main deflection force and displacement calculation results when the span length of the continuous beam bridge is (80+128+80) m, (60+100+60) m and (48+80+48) m. The calculation results of the main deflection force and displacement under different continuous beam bridge span length conditions are shown in Table 3 to Table 5.

[0108] Table 3: Comparison of main force calculation results under different continuous beam bridge span length conditions

[0109]

[0110] Table 4: Comparison of main longitudinal displacement calculation results under different continuous beam bridge span length conditions

[0111]

[0112] Table 5: Comparison of calculation results of main vertical displacement and beam end rotation angle under different continuous beam bridge span length conditions

[0113]

[0114] Based on the analysis of the above calculation results, although the longitudinally connected slab ballastless track structure and sliding layer are used...

Embodiment 3

[0116] This part compares and analyzes the main braking force and displacement calculation results when the longitudinal stiffness of the continuous beam bridge pier is 2600kN / cm, 3600kN / cm and 4600kN / cm respectively. The comparison of rail force and rail displacement under different continuous beam pier longitudinal stiffness conditions is as follows Figure 25 with Figure 26 Shown. Table 6 and Table 7 compare the main braking force and displacement calculation results under different continuous beam pier longitudinal stiffness conditions.

[0117] Table 6: Comparison of main force calculation results under different continuous beam bridge pier longitudinal stiffness conditions

[0118]

[0119] Table 7: Comparison of main displacement calculation results under different continuous beam bridge pier longitudinal stiffness conditions

[0120]

[0121] From the analysis of the above calculation results, as the longitudinal stiffness of the continuous beam bridge pier increases, most ...

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Abstract

The invention relates to a method for designing a jointless track of a long and large bridge girder longitudinal butt plate type ballastless track for a high-speed railway. According to the method provided by the invention, ANSYS software is utilized to establish a latitude vertical space coupling statics model of the jointless track of the long and large bridge girder longitudinal butt plate type ballastless track for the high-speed railway, and ABAQUS software is utilized to establish a space coupling kinetic model. According to the method, the compositions of systems such as a steel rail, a fastener, track plates, a slurry placement layer, bed plates, a sliding layer, a consolidation mechanism, high-strength extruded sheets and L-shaped side check blocks, and structures such as supporting layers on a subgrade soil body and a road foundation and the action of high-speed vehicles are taken into full consideration, and friction factors of sliding layers on different bridge or friction plates, the longitudinal resistance of the fastener, the temperature difference of the bridge girder, the temperature difference of a ballastless track structure, the elastic modulus of the slurry placement layer and the like are calculated, so that the stress and deformation of the track and the bridge girder are obtained. The method provided by the invention is suitable for the design and computational check of the jointless track of the long and large bridge girder longitudinal butt plate type ballastless track for the high-speed railway, and providing service for the design calculation as well as conservation and maintenance of the high-speed railway.

Description

Technical field [0001] The invention belongs to the technical field of railway engineering design, and particularly relates to a method for designing a longitudinally connected slab-type ballastless track seamless track of a high-speed railway long and large bridge. Background technique [0002] At present, many high-speed passenger dedicated lines in my country are adopting longitudinally connected slab ballastless track, and in special areas, there will be a long and large bridge longitudinally connected slab ballastless track seamless track structure. Although many results have been achieved in the research of ballastless track and seamless track on bridges, there are relatively few studies on the new structure of long and large bridge longitudinally connected ballastless track seamless track on high-speed railway. Especially after the longitudinally connected slab ballastless track structure is adopted on the long-span continuous beam, the beam-rail interaction mechanism is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E01D1/00E01D19/12E01B2/00
Inventor 高亮蔡小培曲村肖宏乔神路杨文茂赵磊侯博文
Owner BEIJING JIAOTONG UNIV
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