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Lifting repair method for ballastless track with settled curved section

A ballastless track and repair method technology, applied in the direction of track, track laying, track maintenance, etc., can solve the problems of increased track structure offset and excessive track structure offset, and achieves good environmental performance and high economy. , the effect of efficient construction

Active Publication Date: 2014-11-05
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to realize the smooth turning of the train, the height of the ballastless track structure on the outer side of the curved section of the curve is higher than that of the inner side (up to 18cm). The offset of the track structure is too large, exceeding the maximum offset allowed by the center line of the ballastless track of the high-speed railway, and the offset of the track structure will further increase with the increase of the lifting height. Therefore, the lifting method of the above patent cannot satisfy the curve section The repair requirements of the subsidence ballastless track structure, therefore, the key technology suitable for the rapid uplift repair of the subsidence ballastless track structure in the curved section needs to be studied urgently

Method used

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  • Lifting repair method for ballastless track with settled curved section
  • Lifting repair method for ballastless track with settled curved section
  • Lifting repair method for ballastless track with settled curved section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The embodiment of the present invention provides a grouting and lifting quick repair method and a complete set of construction technology used for the settlement of a curve section of a ballastless track railway.

[0037] (1) Use electronic level and total station to measure the elevation of a line's subsidence ballastless track structure, calculate the required elevation to be 5.5cm, and establish the elevation point monitoring network, and formulate the following elevation plan: use special grouting equipment and The special polyurethane foam material raises the track structure three times, the first two times are designed to raise 2cm, and the third time is 1.5cm. During the lifting process, electronic level and total station are used to monitor the elevation of the track structure in real time.

[0038] (2) According to the characteristics of the on-site ballastless track and the survey results, the lifting unit is divided and the grouting hole is arranged. The layout of...

Embodiment 2

[0048] Such as image 3 As shown, when this embodiment describes grouting and lifting, the construction steps specifically include the following aspects:

[0049] A. Before lifting, use measuring devices such as total station and electronic level to measure the ballastless track structure in the settlement area, and work out the lifting plan of the track structure;

[0050] B. Mark the position of the grouting hole according to the lifting plan, and then implement the drilling. The diameter of the hole is 25mm. After the drilling is completed, the grouting hole is sealed with a plugging piece;

[0051] C. The grouting equipment is installed in place, and the parameters of the grouting equipment are adjusted in time to obtain suitable grouting material performance;

[0052] D. Remove the plugging parts on the upper part of the grouting hole, use a special wrench to quickly install the grouting pipe, and arrange for someone to check the tightness and installation depth of the grouting p...

Embodiment 3

[0058] This embodiment describes that when the grouting material is cement-water glass grouting material, the construction process and corresponding grouting process parameters are specifically as follows.

[0059] The grouting material is a cement-water glass quick-setting and fast-hardening material, with a working time of 30s, and the compressive strength within 1 hour of over 85% of the design strength. The grouting holes are also arranged in the form of plum blossoms, but the spacing of the grouting holes is smaller than that of organic material quick-setting and fast-hardening materials. The lifting hole spacing of the grouting hole is 6.5m, the filling hole spacing is 0.9m, the grouting hole diameter is 4cm, the inner diameter of the grouting pipe is 3cm, and the lower part of the grouting pipe goes deep into the lower part of the ballastless track bed. 5cm below the surface of graded gravel.

[0060] The grouting process parameters of the grouting equipment are respectivel...

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Abstract

The invention belongs to the technical field of repair of high-speed railway ballastless tracks and particularly relates to a lifting repair method for a ballastless track with a settled curved section. The lifting repair method for the ballastless track with the settled curved section comprises the steps that after a lifting unit and the lifting quantity of the curved section of the ballastless track are determined, a high-pressure grouting device is adopted, grouting is conducted on a lifting hole and a filling hole in sequence according to determined equipment parameters, hole positions, a grouting sequence, a grouting rhythm and construction steps with a triangle balance lifting method at a certain pressure, grouting materials are injected into the position below the ballastless track through a grouting pipe installed in the grouting hole in advance and are rapidly cured, longitudinal displacement change, transverse displacement change and vertical displacement change of the track are monitored in real time through a measuring device, and then accurate lift, balance supporting and rapid repair are conducted on a settled ballastless track structure. According to the lifting repair method for the ballastless track with the settled curved section, construction is rapid, practicability and reliability are achieved, cost is low, and the method which is rapid and convenient to implement, practical and economical is provided for solving of the problem of settlement of the ballastless track within skylight time.

Description

Technical field [0001] The invention belongs to the technical field of repairing high-speed railway ballastless track structures, and in particular relates to a method for lifting and repairing a settling ballastless track in a curve section. Background technique [0002] Ballastless track has technical advantages such as high smoothness, good stability, long service life, good durability, and less maintenance workload. At the same time, the laying and operation of ballastless track affects the post-construction work of subgrades, bridges, culverts, and tunnels. The settlement requirements are very strict. The post-construction settlement of the roadbed shall be no more than 15mm, the uneven settlement difference of the transition section of the road bridge and the road tunnel structure shall not be more than 5mm, and the longitudinal deformation angle shall not be more than 0.1%. Pursuing the concept of "zero settlement" to ensure high-speed railway High-speed, safe and smooth o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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