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Ballastless track arch-up improving method based on rope saw cutting

A technology of ballastless track and wire saw, which is applied in the direction of track, track laying, track maintenance, etc. It can solve the problems of high labor intensity, poor continuity of ballast bed and inverted arch filling layer, and low construction efficiency, so as to reduce the labor intensity , Avoid the risk of train along the point, the effect of fast curing speed in the early stage

Inactive Publication Date: 2019-03-08
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

This method requires long-term temporary support by sleepers or steel cushion beams, and the stability and safety of the ballastless track are poor. The ballast bed cast continuously by rapid hardening concrete is prone to cracking, and the track bed cast in sections and the inverted arch filling layer have poor continuity. Cracks are prone to appear at the interface between new and old concrete, which affects the durability of the ballastless track structure, and it is difficult to excavate the concrete of the ballast bed slab and inverted arch, the labor intensity is high, and the construction efficiency is low

Method used

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  • Ballastless track arch-up improving method based on rope saw cutting
  • Ballastless track arch-up improving method based on rope saw cutting
  • Ballastless track arch-up improving method based on rope saw cutting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for rectifying the arching of ballastless track in tunnels with high maximum amount of arching, the method includes the following contents:

[0029] (1) Measure the initial data of the geometric state of the ballastless track before construction, divide the cutting unit according to 1.3m, check the vertical adjustment of each sleeper position on the ballast bed plate, and establish a data joint control network. The vertical design fallback of each sleeper in the remediation section is shown in Table 1.

[0030] Table 1 Design fallback amount of ballastless track

[0031]

[0032] (2) Reinforcement and anchorage of the roadbed slabs at both ends of the treatment section, the anchorage length of the rebar is 15m, and the schematic diagram of the anchorage of the rebar is as follows image 3 As shown, five planting holes are arranged in each row perpendicular to the line direction, and the distance between two adjacent rows is 1.5m.

[0033] (3) In the range ...

Embodiment 2

[0042] A method for rectifying the arching of the ballastless track in a tunnel with a low maximum amount of arching, the method includes the following contents:

[0043](1) Measure the initial data of the geometric state of the ballastless track before construction, divide the cutting unit according to 5m, check the vertical adjustment of each sleeper position on the ballast bed plate, and establish a data joint control network. The vertical design fallback of each sleeper in the remediation section is shown in Table 2.

[0044] Table 2 Ballastless Track Design Setback Amount

[0045]

[0046] (2) Reinforcement and anchorage of the road slabs at both ends of the remediation section, the anchorage length of the rebar is 5m, and the schematic diagram of the anchorage of the rebar is as follows image 3 As shown, two planting holes are set in each row perpendicular to the line direction, and the distance between two adjacent rows is 0.3m.

[0047] (3) The wire saw operation...

Embodiment 3

[0056] The method for rectifying the arching of the ballastless track of the subgrade section and the bridge section with a relatively low maximum amount of arching, the method includes the following contents:

[0057] (1) Measure the initial data of the geometric state of the ballastless track before construction, divide the cutting unit according to 2m, check the vertical adjustment of each sleeper position of the ballastless track, and establish a data joint control network. The vertical design fallback of each sleeper in the remediation section is shown in Table 3.

[0058] Table 3 Ballastless Track Design Setback Amount

[0059]

[0060] (2) Reinforcement and anchorage of the roadbed slabs at both ends of the treatment section, the anchorage length of the rebar is 10m, and the schematic diagram of the anchorage of the rebar is as follows image 3 As shown, 4 planting holes are arranged in each row perpendicular to the line direction, and the distance between two adjac...

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Abstract

A ballastless track arch-up improving method based on rope saw cutting includes the following steps of firstly, determining the falling amount of an arch-up section of a ballastless track, and conducting steel bar embedding and anchoring on the positions, at the two ends of the arch-up section, of the ballastless track; secondly, drilling rope saw operation holes in the side face of the ballastless track; thirdly, cutting off concrete of a supporting part of the ballastless track, providing a falling space for the ballastless track, and limiting the cut ballastless track; fourthly, fine adjusting the ballastless track to fall by a design value, fully filling the lower gap or interlayer gap of the ballastless track with a filling material, and recovering the route stability; fifthly, conducting steel bar embedding and anchoring on an improvement area of the ballastless track, fine adjusting a fastener system and recovering the route smoothness. By means of the method, the existing structure of the ballastless track cannot be changed, the geometrical state of the ballastless track is stable in the improvement process, the train driving safety is not affected, and the method can be implemented in the skylight maintaining time and is suitable for the arch-up improvement of the ballastless track with a high-quality lower concrete force-bearing structure.

Description

technical field [0001] The invention belongs to the technical field of disease treatment of ballastless track structures of high-speed railways, and in particular relates to a method for treating overhanging of ballastless track based on wire saw cutting. Background technique [0002] The ballastless track structure has the characteristics of small deformation, high reliability, strong bearing capacity, less daily maintenance and long service life. The ballastless track structure is mainly used in my country's high-speed railways. The ballastless track in my country is long and has a large span. When passing through a special section, some ballastless tracks will be arched due to the complex geological environment, which seriously affects the smoothness of the ballastless track and threatens the safety of trains. [0003] At present, the arching of ballastless track often adopts the method of adjusting fasteners to improve the track alignment. The fastener adjustment method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B31/00
CPCE01B31/00E01B2204/06
Inventor 易忠来靳昊李化建黄法礼温浩谢永江
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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