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Large-section tunnel advanced large pipe shed multi-operation-surface construction method

A technology of an advanced large pipe shed and a construction method is applied in the field of tunnel advanced support structure construction, which can solve problems such as mutual interference and low construction efficiency, and achieve the effect of reducing mutual influence and improving construction efficiency.

Active Publication Date: 2019-05-10
THE FIRST ENG OF CHINA RAILWAY 16TH CONSTR BUREAU GROUP +1
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AI Technical Summary

Problems solved by technology

Standard cross-section tunnels can only be constructed with one drilling rig due to the limitation of the cross-section size. Large-section or extra-large-section tunnels have space for two or more drilling rigs to work at the same time. However, most construction units currently lack sophisticated advanced large-pipe shed construction plan design. , resulting in large-section or extra-large-section tunnels are generally constructed with one drilling rig or the mutual interference between multiple drilling rigs is serious, and the construction efficiency is low

Method used

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  • Large-section tunnel advanced large pipe shed multi-operation-surface construction method
  • Large-section tunnel advanced large pipe shed multi-operation-surface construction method
  • Large-section tunnel advanced large pipe shed multi-operation-surface construction method

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Embodiment Construction

[0019] Attached below image 3 And embodiment to further illustrate the technical scheme of the present technology invention.

[0020] The embodiment is a three-lane three-center circle tunnel. The outer contour span of the tunnel structure is about 17.0m. The pipe shed is arranged according to the 120° range of the arch. The implementation steps of the technical solution include:

[0021] 1. Measuring equipment working space: HC726 down-the-hole drilling rig is used. The horizontal width of the drilling rig is 2.4m. The minimum and maximum heights of horizontal drilling are 1.7m and 2.9m respectively, and the adjustable height is 1.2m.

[0022] 2. Division of the pipe shed working area: Mark the pipe shed hole within 1.2m of the highest point of the pipe shed hole as the pipe shed area A, calculate the arc length of the pipe shed in the pipe shed area A to be about 10m, and the rest are located in the tunnel The total arc length of pipe shed areas B and C on both sides is ab...

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Abstract

The invention provides a large-section tunnel advanced large pipe shed multi-operation-surface construction method. Through relevant methods of measuring the equipment working space, partitioning a pipe shed working area, distributing the drilling machine workload, designing a pipe shed working platform and determining a construction sequence and the like, the working face and the workload of thepipe shed construction are reasonably distributed, the optimal geological drilling machine configuration number and the optimal pipe shed working platform arrangement scheme are obtained, the mutual influence among multiple drilling machines is reduced, parallel construction of the multiple drilling machines is achieved, and the advanced large pipe shed construction efficiency is improved to the maximum degree.

Description

[0001] The invention relates to a multi-working surface construction method for a large-section tunnel ahead of a large pipe shed, and belongs to the technical field of tunnel advance support structure construction. Background technique [0002] The advanced large pipe shed is a technical measure applied to the weak and broken ground or unfavorable geological sections of the tunnel. It is usually arranged in the tunnel body in the range of 120° of the arch to play the role of advanced shed protection and prevent large deformation and collapse of the surrounding rock. Disaster control has good effect. According to the needs of the working space, the construction methods of the advanced large pipe shed mainly include two types: the studio type of the expanded pipe shed and the jacking type after the construction of the tunnel surface. The characteristic of low risk is the main method used in the construction of the tunnel ahead of the large pipe shed. This method uses a geologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10
Inventor 万飞王波付重滔孔德抗李栋周长武杜英亮郭伟
Owner THE FIRST ENG OF CHINA RAILWAY 16TH CONSTR BUREAU GROUP
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