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Construction method of a control device for arching at the bottom of a ballastless track tunnel

A ballastless track and control device technology, applied in tracks, roads, tunnels, etc., can solve the problem that the line smoothness cannot be guaranteed, and achieve the effect of ensuring the safety of tunnel construction and operation, high promotion value, and ensuring operation safety.

Active Publication Date: 2020-04-21
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency that the smoothness of the line cannot be guaranteed when the upward arch deformation of the bottom of the track tunnel is greater than the maximum adjustment amount of the fastener when the fastener is used for adjustment in the prior art, and provides a The Construction Method of the Control Device for Bottom Arching of Ballastless Track Tunnel

Method used

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  • Construction method of a control device for arching at the bottom of a ballastless track tunnel
  • Construction method of a control device for arching at the bottom of a ballastless track tunnel

Examples

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Embodiment 1

[0028] Such as Figure 1-Figure 2 As shown, the bottom part of the ballastless track tunnel mainly includes the tunnel bottom surrounding rock 1, on which the primary support 2, the secondary lining 3, and the inverted arch filling layer 4 are successively arranged above the tunnel bottom surrounding rock 1. A track bed slab 5 is laid on the arch filling layer 4 , a sleeper 6 is arranged on the track bed slab 5 , and a ballastless track 7 is installed on the sleeper 6 .

[0029] A control device for arching at the bottom of a ballastless track tunnel, comprising several vertical drills with a diameter of 10cm-30cm that are vertically driven from the ballast slab 5 into the tunnel bottom surrounding rock 1 after the construction of the ballast slab 5 is completed. Hole 8, the setting position of the vertical borehole 8 is relatively staggered from the laying position of the ballastless track 7, and the centerline of the vertical borehole 8 and the centerline of the ballastless ...

Embodiment 2

[0033] A construction method of a control device for arching the bottom of a ballastless track tunnel, including any one of the control devices for arching the bottom of a ballastless track tunnel, and the construction method is as follows:

[0034] Step 1: After the construction of the track bed slab 5 is completed, the vertical borehole 8 is vertically driven into the surrounding rock 1 at the bottom of the tunnel from the ballast slab 5, and the setting position of the vertical borehole 8 is consistent with the laying of the ballastless track 7 The positions are relatively staggered, and the centerline of the vertical borehole 8 is at least D=30cm away from the centerline of the ballastless track 7;

[0035] Step 2: laying a supporting pipe on the inner wall of the vertical borehole 8;

[0036] Step 3: Set strain gauges on the support pipe and check them regularly;

[0037] Step 4: When the stress results of the strain gauge tend to be stable, the vertical borehole 8 is gr...

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Abstract

The invention discloses a ballastless track tunnel bottom upwarping control device and a construction method thereof. The control device comprises a plurality of vertical drill holes which are vertically drilled into a tunnel bottom surrounding rock from a roadbed slab after the construction of the roadbed slab is completed. The forming positions of the vertical drill holes are staggered with thelaying position of a ballastless track, and the inner walls of the vertical drill holes are provided with supporting pipes. The construction method comprises: vertically drilling the vertical drill holes into the tunnel bottom surrounding rock from the roadbed slab after the construction of the roadbed slab of the track is completed, and the forming positions of the vertical drill holes being staggered with the laying position of the ballastless track; laying the supporting pipes on the inner walls of the vertical drill holes, arranging strain gauges on the supporting pipes, and conducting regular detection; and when the stress of the strain gauges tends to be stable, grouting and sealing the vertical drill holes. According to the invention, by using the difference between rigidity of a tunnel structure supporting system and rigidity of the vertical drill holes, a deformation space is provided for the tunnel bottom surrounding rock through the inward deformation of the vertical drill holes, so as to achieve the goals of eliminating the upwarping of the tunnel bottom and controlling the deformation of the tunnel bottom.

Description

technical field [0001] The invention relates to the technical field of railway engineering construction, in particular to a construction method of a control device for arching the bottom of a ballastless track tunnel. Background technique [0002] High-speed railways have extremely high requirements on track smoothness. If the track smoothness is poor, it will cause severe vibration of the rolling stock, and the force of the wheel and rail action will double, which will seriously damage the track and rolling stock components, affect the increase of train speed, and even easily cause the train to derail. Overturned, endangering driving safety. At present, my country's high-speed railways all adopt the ballastless track type. When the ballastless track is laid in the tunnel, the excavation of the tunnel destroys the original stress balance state of the surrounding rock at the bottom of the tunnel, and the surrounding rock at the bottom of the tunnel needs to go through a new s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01B2/00E21D21/00E21D20/02E21D11/00
CPCE01B2/00E01B2/006E21D11/003E21D20/021E21D21/0026
Inventor 陶伟明王磊余大龙宋洋
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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