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A device and method for automatically cutting the interior of surrounding rock for small-section expansion of tunnels under construction

An automatic cutting device and small-section technology, applied in tunnels, earthwork drilling, mining equipment, etc., can solve problems such as increased construction risks, disturbance of surrounding rocks, waste of manpower and material resources, etc., to improve safety and efficiency, Effects of improving impact and breaking properties and reducing excavation steps

Active Publication Date: 2021-04-09
CCCC FOURTH HIGHWAY ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the reconstruction and expansion of existing tunnels, the timeliness of the excavation section is one of the most important and difficult points. Most of the traditional in-situ expansion excavation is the support of the entire section or the use of I-beam welding to excavate smaller parts Supporting the rock, and then carrying out the steps of blasting, supporting and slag removal for the expanded excavation section, a lot of manpower and material resources will be wasted for re-supporting, and the overall structure of the surrounding rock will be greatly disturbed during the blasting process, which will lead to The overall structure is unstable, increasing the risk of construction

Method used

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  • A device and method for automatically cutting the interior of surrounding rock for small-section expansion of tunnels under construction
  • A device and method for automatically cutting the interior of surrounding rock for small-section expansion of tunnels under construction
  • A device and method for automatically cutting the interior of surrounding rock for small-section expansion of tunnels under construction

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Experimental program
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Effect test

Embodiment 1

[0036] Figure 1-3 It shows the surrounding rock internal automatic cutting device of the present invention for expanding and excavating the small section of the tunnel under construction, including: a central rotating shaft 1; also includes a telescopic hydraulic device 2 distributed on the central rotating shaft 1; on the hydraulic device 2 A milling cutter 3 is provided; the central rotating shaft 1 is connected to a sealing cover 8 used to seal the surrounding rock drilling, and the hydraulic device 2 is controlled to expand and contract by a controller 9, which also controls the rotating of the central rotating shaft 1.

[0037] The hydraulic device 2 can drive the milling cutter 3 to extend. After the milling cutter 3 is extended, it can be rotated by the central rotating shaft 1 to cut the inside of the surrounding rock. This device effectively improves the construction efficiency and is a new automatic surrounding rock cutting device. .

[0038] In the present embodim...

Embodiment 2

[0052] The present invention also relates to a cutting method, specifically comprising the following steps:

[0053] S1: Open a drill hole on the surrounding rock section, and insert the above-mentioned automatic cutting device inside the surrounding rock for the small section expansion of the tunnel under construction into the drill hole, and use the sealing cover 8 to seal the drill hole;

[0054] S2: Operate the controller 9 to control the extension of the hydraulic device 2 so that the milling cutter 3 can touch the inside of the surrounding rock, and then operate the controller 9 to rotate the central rotating shaft 1 to perform cutting and reaming inside the surrounding rock;

[0055] S3: Step S2 is repeated until the process of cutting and reaming holes inside the surrounding rock is completed.

[0056] In the present embodiment, before the cutting device is inserted into the borehole, a steam generator 4 is installed, and the steam generator 4 and the milling cutter 3 ...

Embodiment 3

[0060] figure 1 It shows a surrounding rock internal cutting device for excavating a small section of a tunnel under construction, which includes a central rotating shaft 1, a hydraulic pump 2, a 3-head milling cutter 3, a steam generator 4, a hole 5, and a protective shell 6. Cutting hole 7, sealing cover 8, controller 9 and water vapor introducer 10. The bottom end of the central rotating shaft 1 is provided with a spiral connection port; the hydraulic device 2 is arranged in a staggered array along the central rotating shaft 1, and the 3-head milling cutter 3 is fixed to the top of the hydraulic device 2; the generator 2 is connected with the protection The shell 6 is provided with holes and cutting holes at the staggered positions of the milling cutters 3, and at the bottom of the device, the sealing cover 8 is closely connected with the spiral interface of the first step of the central rotating shaft 1. The device effectively improves the construction efficiency and is a...

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Abstract

The present invention relates to a surrounding rock internal automatic cutting device and method for excavating a small section of a tunnel under construction. For the cutting device of the present invention, it includes: a central rotating shaft; The hydraulic device is provided with a milling cutter; the central rotating shaft is connected to the sealing cover used to seal the surrounding rock drilling, and the hydraulic device is controlled by a controller to expand and contract, and the controller also controls the rotation of the central rotating shaft. For the cutting method of the present invention, it specifically includes the following steps: S1: Open a drill hole on the surrounding rock section, insert the above-mentioned cutting device into the drill hole, and seal the drill hole with a sealing cover; S2: Operate the controller to control the hydraulic pressure. The device is extended so that the milling cutter can touch the inside of the surrounding rock, and then the controller is operated to rotate the central rotating shaft to perform cutting and reaming inside the surrounding rock; S3: Repeat step S2 until the process of cutting and reaming inside the surrounding rock is completed. The invention can expand the excavation section, rotate the cutting and extend the cutting radius.

Description

technical field [0001] The invention relates to an automatic cutting device inside the surrounding rock for expanding and excavating the small section of the tunnel under construction. [0002] The present invention also relates to a cutting method of the above-mentioned cutting device. Background technique [0003] With the continuous development of our country's economy, the population continues to increase, and road traffic is increasingly congested. When faced with insufficient capacity of existing tunnels and the need for expansion or reconstruction of existing tunnels, often due to the limitations of the adjacent structures of the tunnel, there is no space for new tunnels. The technology of in-situ reconstruction and expansion is adopted. [0004] In the reconstruction and expansion of existing tunnels, the timeliness of the excavation section is one of the most important and difficult points. Most of the traditional in-situ expansion excavation is the support of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/01E21D9/00F42D1/00F42D3/04
CPCE21D9/006E21D9/01F42D1/00F42D3/04
Inventor 包特门白乙拉杨伟光姚景武赵耀郑永飞刘俊奇程稳征吕鑫李君周琦高靖伟郭高亮王磊宋改军
Owner CCCC FOURTH HIGHWAY ENG
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