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Construction method of a device capable of preventing deformation of ballastless track tunnel bottom

A ballastless track and construction method technology, applied in tunnels, shaft equipment, earth-moving drilling and other directions, can solve the problem that the smoothness of the line cannot be guaranteed, and achieve the effect of saving renovation and maintenance costs, ensuring safety, and facilitating construction.

Active Publication Date: 2019-07-26
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 Construction method of device capable of preventing deformation of ballastless track tunnel bottom

Method used

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  • Construction method of a device capable of preventing deformation of ballastless track tunnel bottom

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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the bottom part of the ballastless track tunnel mainly includes the tunnel bottom surrounding rock 1, and above the tunnel bottom surrounding rock 1, the tunnel invert initial support 2, the tunnel invert lining 3, and the invert filling layer 4 are successively arranged. A ballast bed slab 5 is laid on the inverted arch filling layer 4 , a sleeper 6 is arranged on the ballast bed slab 5 , and a ballastless track 7 is installed on the sleeper 6 .

[0030] A device for preventing the deformation of the ballastless track tunnel bottom, comprising several transverse boreholes 9 with a diameter of 10cm-30cm arranged in the surrounding rock 1 of the tunnel bottom, each of the transverse boreholes 9 is arranged in the tunnel along the transverse direction of the tunnel directly below the inverted arch primary support 2, and the length of the transverse borehole 9 is greater than the transverse length of the tunnel. The transverse boreholes 9 are ar...

Embodiment 2

[0033] Such as figure 1 Shown, a kind of construction method of the device that can prevent the deformation of ballastless track tunnel bottom, comprises any one described device that can prevent the deformation of ballastless track tunnel bottom, its construction method is:

[0034] Step 1: setting the drilling studio 8 on one side of the tunnel;

[0035] Step 2: Perforating horizontally along the tunnel in the working chamber 8, so as to form several transverse drilling holes 9;

[0036] Step 3: laying a support pipe on the inner wall of the transverse borehole 9;

[0037] Step 4: Set strain gauges on the support pipe for regular detection;

[0038] Step 5: When the detected stress value of the strain gauge tends to be stable, the transverse borehole 9 is grouted and closed.

[0039] This construction method can greatly reduce the arching deformation of the tunnel bottom and release part of the tunnel bottom stress through the set horizontal drilling; through the regular ...

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Abstract

The invention discloses a device for preventing the tunnel bottom of a ballastless track from deforming and a construction method thereof. The device for preventing the tunnel bottom of the ballastless track from deforming comprises a plurality of transverse boreholes formed in the surrounding rock of the tunnel bottom, each transverse borehole is formed under an initial support of an tunnel invert in the transverse direction of a tunnel, and supporting pipes are arranged on the inner walls of the transverse boreholes. The construction method comprises the following steps that a drilling operating room is arranged on one side of the tunnel; the multiple of transverse boreholes are formed by drilling in the transverse direction along the tunnel in the operating room; the supporting pipes are laid in the transverse boreholes; strain gauges are arranged on the support pipes for periodic detection; and when the stress value of the strain gauges becomes stable, the transverse borehole are grouted and sealed. According to the device for preventing the tunnel bottom of the ballastless track from deforming and the construction method thereof, deformation space is provided for the surrounding rock of the tunnel bottom through the internal shrinkage deformation of the transverse boreholes, so that the volume increment of the surrounding rock caused by the stress adjustment of the surrounding rock can be reduced, the purposes of eliminating overarching of the tunnel bottom and controlling the deformation of the tunnel bottom are achieved, and construction and operation risks of overarching of a complex geological tunnel base are controlled effectively.

Description

technical field [0001] The invention relates to the technical field of railway engineering construction, in particular to a construction method of a device capable of preventing deformation of a ballastless track tunnel bottom. 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 throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00
CPCE21D11/003
Inventor 陶伟明王磊余大龙宋洋
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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