Rapid repairing method for sunken ballastless track through grouting lifting

A ballastless track and repair method technology, which is applied in the direction of track, track laying, track maintenance, etc., can solve the problems of unsuitable repair work, unfavorable repair work, high cost, etc., and achieve saving of repair material costs, significant technical and economic efficiency, and saving The effect of material cost

Inactive Publication Date: 2014-11-19
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after increasing the adjustable amount of the fastener system, the pads of the fastener system need to use integral pads to maintain the stability of the track structure. Due to the different settlements in different locations, the overall pads used in each fastener system The thickness of the fastener system is not the same. In this way, different overall pads need to be molded separately, which is costly. In addition, the increase in the adjustable amount of the fastener system is limited. For the track structure that continues to sink with the extension of operation time , this approach also has limitations
Another method is to use ordinary cement-based materials for grouting. This method has problems such as uncontrollable expansion of the grout at the bottom of the ballastless track, slow strength development, poor lifting effect, and difficulty in achieving accurate and rapid lifting of the track structure.
[0005] Aiming at the disadvantages of the above two methods, the experimental research on the rapid repair technology of ballastless track settlement disease has been carried out at home and abroad, but it is still in the stage of experimental development. System and method (201310027717.0)", which only provides a lifting method and grouting sequence of ballastless track stru

Method used

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  • Rapid repairing method for sunken ballastless track through grouting lifting
  • Rapid repairing method for sunken ballastless track through grouting lifting
  • Rapid repairing method for sunken ballastless track through grouting lifting

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1 of the present invention provides a rapid repair method for grouting and lifting of a single-line subsidence ballastless track in a straight line section. The method includes the following contents:

[0045] (1) Before lifting, use an electronic level (with an accuracy of at least 0.1mm) to measure the smoothness of the ballastless track structure in the subsidence area, and establish a monitoring network for lifting points; The design lifting height corresponding to the rail platform (001) is shown in Table 1. figure 1 shown.

[0046] Table 1 Design lifting height of 1# to 20# rail support platform

[0047] Rail platform number

Design Lifting Height (mm)

Rail platform number

Design Lifting Height (mm)

1#

17

11#

31

2#

17

12#

30

3#

20

13#

27

4#

21

14#

25

5#

22

15#

23

6#

24

16#

21

7#

25

17#

18

8#

...

Embodiment 2

[0059] Embodiment 2 of the present invention provides a rapid repair method for grouting and lifting of a single-line settlement ballastless track in a curved section. The method includes the following contents:

[0060] (1) The repair process and steps are basically the same as in Example 1, except that the drilling and layout of lifting and filling grouting holes are slightly different, and the schematic diagrams are as follows Figure 8 , 9 As shown, the interface of the grouting pipe (005) for lifting is set on the superelevation side of the line curve, and the grout flows from the low side to the superelevation side, while the interface of the grouting pipe (005) for filling is preferably set on the outside of the line, and the grout flows from the superelevation side. The high side flows to the low side to ensure a lifting effect.

[0061] (2) The material used for grouting the lifting grouting hole is polyurethane foam material, which can work for 10s and reach more than...

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Abstract

The invention relates to a rapid repairing method for a sunken ballastless track through grouting lifting. According to the method, grouting materials, device tools and a construction technology are needed, and the method specifically comprises the steps that after lifting quantity of the ballastless track is determined, a high-pressure grouting device is adopted, and under certain grouting pressure, rapid-hardening grouting materials are grouted under a ballastless track base which is horizontally arranged in advance and in grouting bags in a graded broken stone surface layer through a grouting pipe in a certain sequence; in the grouting process, an electronic level precise measurement device is adopted to monitor elevation changes of the upper portion of the track in real time, when the elevation is close to or reaches the designed elevation, grouting lifting is stopped, then rapid-hardening grouting materials with high fluidity are directly grouted in the gap between the lifted base and the graded broken stone layer, the grouting materials rapidly and fully fill the gap and are solidified, the lifted base and the graded broken stone layer are integrally bonded, and the ballastless track is precisely lifted and firmly located.

Description

technical field [0001] The invention belongs to the technical field of maintenance and repair of ballastless tracks of high-speed railways, and in particular relates to a rapid repair method for lifting ballastless tracks by grouting for subsidence. Background technique [0002] Ballastless track is the most advanced track technology in the world today, and it is the main track structure type used in the construction of high-speed railways in my country. my country's new Beijing-Tianjin, Shanghai-Hangzhou, Shanghai-Nanjing, Wuhan intercity, Zhengxi, Wuhan-Guangzhou, Beijing-Shanghai, High-speed railways such as Harbin-Dalian, Jingshiwu, Hangzhou-Ningbo, Ninghang, Hefu, Jinqin, Shanghai-Kunming, Lanxin, Haqi, Ning'an, Zhengxu, Shendan all use ballastless track type. Ballastless track has technical advantages such as high smoothness, good stability, long service life, good durability, and less maintenance workload. Settlement requirements are very strict. The post-construction...

Claims

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Application Information

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IPC IPC(8): E01B29/04
Inventor 郑新国刘竞谢永江翁智财李书明曾志朱长华仲新华杨德军王月华
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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