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A method for the preparation of rail rows in curved sections of urban rail construction

A technology for urban rails and curved sections, applied in the directions of rails, laying rails, rail maintenance, etc., can solve the problems of not taking into account the difference of the rail head phase offset and the distribution of sleepers, wasting rails, rail head damage, etc., to achieve neat arrangement. , Reduce the waste of raw materials, reduce the effect of impact damage

Active Publication Date: 2017-01-18
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main method for the preparation of curved section rails in domestic urban rail construction is to rely on the shortened rail preparation method for construction calculation and preparation. This method does not consider the difference between the production (straight line) state and the actual (curve) state of the curved section rail head. The amount difference and the distribution of sleepers, the rail row produced by this method has large rail joints after assembly, the rail head is seriously damaged during the construction process, the inner rail of the curve needs to be sawed short, wasting the rail, the sleeper layout is deformed, and the tangent of the curve is not vertical

Method used

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  • A method for the preparation of rail rows in curved sections of urban rail construction
  • A method for the preparation of rail rows in curved sections of urban rail construction
  • A method for the preparation of rail rows in curved sections of urban rail construction

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Embodiment 1

[0064] Under the confidentiality agreement of the present invention, the method has been successfully tried out in track engineering in various places. Now take ZJD7 of Wuxi Metro Line 2 as an example:

[0065] It is known that the symmetric transition curve turns left, R=300,l 0 =60, the total length of the curve L=207.742, the ZH point mileage is ZDK4+112.314, the starting mileage is ZDK4+104.5, the starting point misalignment is 35mm, the track center distance is 1508mm, the rail length is 25m, the sleeper spacing is 625mm, the sleeper To the left stock rail head 305mm, please configure the curved section rail row.

[0066] 1. Calculation of shortening amount:

[0067] ①Curve relaxation curve shortening amount:

[0068] ②Shortening of circular curve:

[0069] ③The total shortening of the curve: Δl=Δl S1 +Δl c +Δl S2 =151+441+151=743mm

[0070] 2. The configuration of the first auxiliary rail row:

[0071] ①The length of the rail row entry curve: starting point ...

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Abstract

The invention belongs to the technical field of engineering technical urban rail transit construction, and particularly relates to an urban railway curved section track panel preparing method. The method comprises the following steps that the state of track panels of a track is restored, sleepers are laid, the stagger amount of track panel rail joints is prefabricated, the curve shortening amount is calculated, the shortening amount between any points of a transition curve is calculated, the transition curve shortening amount is calculated, the curve section total shortening amount is calculated, the stagger amount of track panel rail joints is calculated in a linear state or in a curve state, and the spacing distribution of the sleepers is calculated. Compared with the prior art, the method has the advantages that configuration data of the track panels are accurate, making and assembling of the track panels are convenient, simple and accurate, the problem that rail gaps are large after on-site assembly of the track panels is conducted is avoided, impact damage to railheads conducted by rail cars is reduced, shortened rails made by a factory are not used, the problem that rail sawing is needed in the curve is avoided, the waste of raw materials is reduced, the cost is saved, and the arrangement of the sleepers on the curve is regular, uniform, attractive and free of inclination.

Description

[technical field] [0001] The invention belongs to the technical field of urban rail transit construction of engineering technology, and specifically relates to a method for preparing rail rows in curved sections of urban rail construction. [Background technique] [0002] Urban rail transit is an important part of urban public transportation. With the development of the national economy and the acceleration of urbanization, the development of rail transit is also accelerating. The track construction accuracy of rail transit is required to be continuously improved with the increase of speed. Through the control of the rail row production in the track construction process, the utilization rate of the rail can be improved, the damage to the rail head can be reduced, the material can be saved, and the construction quality and appearance quality can be improved. [0003] At present, the main method for the preparation of curved section rails in domestic urban rail construction is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B29/02
CPCE01B29/02
Inventor 胡光静刘习生
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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