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Narrowing method of straddle-type monorail transit curved track beam

A straddle-type monorail and curved track technology, applied in tracks, roads, buildings, etc., can solve the problems of high power consumption, short service life, large deformation, etc., to increase service life, prevent tire blowouts, and reduce compression deformation. Effect

Active Publication Date: 2010-10-06
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the defects of vehicle tires such as excessive deformation, puncture, excessive wear, short service life, and large power consumption due to excessive extrusion of track beams, and improve economic benefits

Method used

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  • Narrowing method of straddle-type monorail transit curved track beam
  • Narrowing method of straddle-type monorail transit curved track beam
  • Narrowing method of straddle-type monorail transit curved track beam

Examples

Experimental program
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Effect test

example 1

[0046] Example 1 The width of the curved track beam is narrowed, see figure 1 .

[0047] Take the narrowing of the width of the curved track beam on the line with the radius of the circular curve R=100m as an example for illustration.

[0048] Using large vehicles, the standard width of the track beam is 850mm. Since R≤150m, the beam width reduction value ΔL is 15mm from table 2, and the narrowed width of the curved track beam is 835mm.

[0049] When the track beam is manufactured, the position of the outer formwork of the curved track beam is moved from the original design position 1 to the center of the curve by 15mm to the narrowed formwork position 2, and the position of the inner formwork remains unchanged. When the track beam is erected, the center line of the line remains unchanged, and the track beam is measured, positioned and erected according to half the standard beam width from the inner side of the curved track beam to the line center line.

example 2

[0050] Example 2 Straight line + transitional curve + circular curve track beam width narrowed, see image 3 .

[0051] Take the narrowing of track beam width on the line of straight line + transitional curve (length 72m) + circular curve (radius R = 100m) as an example for illustration.

[0052] Using a large vehicle, when the plane circular curve radius R=100m, since R≤150m, the beam width reduction value ΔL obtained from Table 2 is 15mm, and the narrowed width of the circular curve segment track beam is 835mm. This line is provided with a transitional curve, so the change in the width of the curved track beam should decrease uniformly within the entire transitional curve between the straight line and the circular curve, and the rate of decrease is ΔL / S=15 / 72000=0.2‰, which is far less than the allowable rate of decrease Value 2‰.

[0053] When the track beam on the transition curve is processed and manufactured, the position of the outer formwork of the curved track beam ...

example 3

[0054] Example 3 The width of the track beam on the straight line + circular curve is narrowed, see Figure 4 .

[0055] The narrowing of the width of the track beam on the line of straight line + circular curve (radius R=100m) is taken as an example for illustration. Using a large vehicle, when the radius of the circular curve is R=100m, the beam width reduction value ΔL obtained from Table 2 is 15mm, and the narrowed width of the track beam at the circular curve section is 835mm. Since there is no transition curve, the track beam width should be reduced within a certain length on the straight beam section. Since the decline rate should not be greater than 2‰, the required decreasing length on the straight beam section should be at least S=15mm / 0.002= 7500mm = 7.5m.

[0056] When the track beam is manufactured, the position of the outer formwork of the track beam is moved from the original design position 1 to the narrowed position 2 in the direction of the center of the li...

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Abstract

The invention discloses a narrowing method of a straddle-type monorail transit curved track beam, relating to the straddle-type monorail transit track beam. In the straddle-type monorail transit system, the breadth of the track beam of which the horizontal alignment is in a circular curve segment is narrowed according to the curve radius and the different vehicle types; and when the track beam is located at a straight line, a transition curve and a circular curve or a straight line and a circular curve, the track beam is adjusted in accordance with respective variation regularity of beam breadth. As the track beam is processed and produced, an outer template of the curved track beam is moved from the original place toward the curve central direction to reach the narrowed position by the distance of a corresponding narrowed value; and an inner template thereof remains the same. During setting up the track beam, the central line of the route remains unchanged, the measuring location and the setup of the track beam are performed based on that the inner side of the track beam is semi breadth of a standard beam away from the central line of the route. The invention overcomes the defects of excessive deformation, tire burst, excessive wear, short service life, large power consumption and the like for the vehicle tires resulted from excessive extrusion for the track beam, and simultaneously improves the economic benefit.

Description

technical field [0001] The invention relates to a straddle-type monorail traffic track beam, specifically, in a straddle-type monorail traffic system, the track beam whose plane alignment is on a curved section, appropriately reduces the width of the track beam according to the difference in the radius of the curve . Background technique [0002] For railways and subways on curved lines, in order to make rolling stock pass through the curved section smoothly, prevent the vehicle wheel from being wedged by the track or squeeze the rail, reduce the lateral force between the wheel and rail, and reduce the damage of the rolling stock to the track. When the curve radius of the line is small to a certain value, the gauge should be appropriately widened. [0003] At present, the existing and under construction straddle monorails all over the world, no matter in the straight section or the curved section, the width of the track girder is fixed. The monorail traffic system in Chong...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B25/10
Inventor 朱尔玉郭峰韩军李圣强
Owner BEIJING JIAOTONG UNIV
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