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Sedimentation improving method for ballastless track based on rope saw cutting

A ballastless track and wire saw technology is applied in the directions of track, track laying, track maintenance, etc., which can solve the problems of high labor intensity, poor continuity of the ballast bed and inverted arch filling layer, and low construction efficiency, and reduce labor intensity. , avoid the risk of driving along the point, the effect of simple construction technology

Inactive Publication Date: 2019-02-19
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

This method requires long-term temporary support by wooden 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. Moreover, it is difficult to excavate the concrete of the ballast bed slab and the inverted arch, the labor intensity is high, and the construction efficiency is low.

Method used

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  • Sedimentation improving method for ballastless track based on rope saw cutting
  • Sedimentation improving method for ballastless track based on rope saw cutting
  • Sedimentation improving method for ballastless track based on rope saw cutting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The settlement control method of the ballastless track in the subgrade section of the Duanjia District includes the following contents:

[0030] (1) Measure the initial data of the geometric state of the ballastless track before construction, divide the cutting unit according to 0.65m, check the lift at each sleeper position of the ballastless track, and establish a data joint control network. The design lift of each sleeper in the remediation section is shown in Table 1.

[0031] Table 1 Design lift of ballastless track

[0032]

[0033] (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 Figure 4 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.

[0034] (3) Drill a wire saw operation hole at the interface between the ba...

Embodiment 2

[0040] The settlement control method of ballastless track in the bridge section includes the following contents:

[0041] (1) Measure the initial data of the geometric state of the ballastless track before construction, divide the cutting unit according to 1.3m, and check the lift of each sleeper on the track bed, and establish a data joint control network. The designed uplift of each sleeper in the remediation section is shown in Table 2.

[0042]Table 2 Design lift of ballastless track

[0043]

[0044] (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 Figure 4 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.

[0045] (3) Drill a wire saw operation hole across the ballastless track at the interface between the ballastless track bed ...

Embodiment 3

[0051] The subgrade section ballastless track settlement control methods include the following:

[0052] (1) Measure the initial data of the geometric state of the ballastless track before construction, divide the cutting unit according to 4m, and check the lift at each sleeper position of the ballast bed slab, and establish a data joint control network. The design lift of each sleeper in the remediation section is shown in Table 3.

[0053] Table 3 Design lift of ballastless track

[0054]

[0055] (2) For the anchorage of the ballast slab in the tunnel, the anchorage length of the reinforcement is 10m, and the schematic diagram of the anchorage of the reinforcement 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 adjacent rows is 1.3m.

[0056] (3) Drill a wire saw operation hole across the ballastless track at the interface between the ballastless track bed and the supporting st...

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Abstract

The invention discloses a sedimentation improving method for a ballastless track based on rope saw cutting. The method comprises the following steps that (1) the sedimentation volume of the part, in asedimentation section, of the ballastless track is determined, and the two ends of the sedimentation section of the ballastless track are subjected to bar planting and anchoring; (2) a rope saw operation hole is drilled in the side surface of the ballastless track; (3) a rope saw is adopted for cutting concrete of the ballastless track, bonding constraint of the ballastless track is removed, andthe ballastless track after cutting is limited; (4) a jacking device placing groove is formed in concrete below a horizontal cutting seam; (5) after a jacking system is adopted for jacking the ballastless track to a design value, gaps of the lower portion of the ballastless track after jacking are filled with a filling material to be full, and the line stability recovers; (6) the ballastless trackin the improving area is subjected to bar planting and anchoring, the fastener system is accurately adjusted, and the line smoothness recovers. The method is simple, quick, safe and reliable, in theimproving process, the geometrical state of the ballastless track is stable, the running safety of trains cannot be influenced, and the improving can be conducted in the period of maintaining skylights and is suitable for quick jacking of the ballastless track.

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 settlement treatment method 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. my country's ballastless track lines are long and have large spans. When passing through special sections, some ballastless tracks will cause settlement due to the complex geological environment, seriously affecting the smoothness of the ballastless track lines and threatening the safety of trains. [0003] At present, the settlement of ballastless track often adopts the method of adjusting fasteners to improve the track alignment. The fastener adjust...

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 李化建靳昊易忠来黄法礼王振谢永江
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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