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United method for tunneling super-strong or strong rock burst hole section of TBM construction tunnel

A tunnel and rockburst technology, which is applied in the field of tunnel excavation and support, can solve the problems of being unable to deal with extremely strong or strong rockburst limitations, achieve strong economic and social benefits, ensure tunneling speed, and ensure safety.

Inactive Publication Date: 2010-12-15
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above existing problems, the object of the present invention is to provide a combined tunneling method for extremely strong or strong rockburst sections of TBM construction tunnels, aiming at overcoming the limitation that the TBM tunneling method cannot deal with extremely strong or strong rockburst problems, and making full use of The flexibility of the drilling and blasting construction control measures and the advantages of TBM’s rapid excavation can not only control extremely strong or strong rockbursts, ensure construction safety, protect TBM equipment, but also give full play to the advantages of TBM’s rapid excavation and ensure the progress of the project. Purpose

Method used

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  • United method for tunneling super-strong or strong rock burst hole section of TBM construction tunnel
  • United method for tunneling super-strong or strong rock burst hole section of TBM construction tunnel
  • United method for tunneling super-strong or strong rock burst hole section of TBM construction tunnel

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Embodiment 1

[0022] The diameter of the designed excavation section of the TBM construction tunnel in this embodiment is 10m, and the diameter of the design excavation section of the TBM construction tunnel is greater than 10m, which is to comprehensively consider the size of the excavation section of the upper pilot tunnel and the size of the construction machinery in the drilling and blasting excavation. Factors, for TBM construction tunnels with diameters less than 10m, only the full-face drilling and blasting method can be selected to deal with extremely strong or strong rockbursts.

[0023] Its joint tunneling method includes the following steps:

[0024] ①The design of the tunnel excavation section for TBM construction. The excavation section is divided into two parts, the upper part is the upper pilot tunnel, and the lower part is the TBM excavation section. The relative positional relationship between the two is as follows: figure 1 shown.

[0025] ②The design of the excavation se...

Embodiment 2

[0029] The diameter of the designed excavation section of the TBM construction tunnel in this embodiment is 10m, and the diameter of the design excavation section of the TBM construction tunnel is greater than 10m, which is to comprehensively consider the size of the excavation section of the upper pilot tunnel and the size of the construction machinery in the drilling and blasting excavation. Factors, for TBM construction tunnels with diameters less than 10m, only the full-face drilling and blasting method can be selected to deal with extremely strong or strong rockbursts.

[0030] Its joint tunneling method includes the following steps:

[0031]①The design of the tunnel excavation section for TBM construction. The excavation section is divided into two parts, the upper part is the upper pilot tunnel, and the lower part is the TBM excavation section. The relative positional relationship between the two is as follows: Figure 5 shown.

[0032] ②The design of the excavation se...

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Abstract

The invention relates to a united method for tunnelling a super-strong or strong rock burst hole section of a TBM construction tunnel by sufficiently utilizing the flexibility of the construction control measures of the drilling and blasting method and the advantages of TBM rapid tunneling,, aiming at overcoming the limitation that the traditional TBM tunneling method cannot be used for dealing with super-strong or strong rock burst. The united method is characterized by comprising the steps of designing an excavated section by an upper guide hole drilling and blasting method, excavating the section by the upper guide hole drilling and blasting method, supporting by surrounding rocks, and TBM whole section tunneling and supporting. The united method solves the problem that the traditional construction excavation technology cannot be used for effectively pretreating super-strong or strong rock burst risk in the process of high-stress tunnel TBM tunneling, guarantees the safety of TBM equipment and construction staff, ensures the tunneling speed of TBM, and has strong economical benefit and social benefit. The invention is suitable for the TBM excavation construction of high-stress tunnels, such as various water conservancy and hydropower tunnels, traffic tunnels, and the like.

Description

Technical field: [0001] The invention relates to a joint tunneling method in the field of tunnel excavation and support, in which a drill-and-blast method is used to excavate an upper pilot tunnel in a section of a TBM construction tunnel with extremely strong or strong rockburst, and then TBM excavates the entire section. It is mainly used for adopting the TBM method. High-stress tunnels such as water conservancy, hydropower, and transportation that are excavated and have extremely strong or strong rockburst risks in all or part of the tunnel sections. Background technique: [0002] Rockburst is a strong surrounding rock failure caused by the sudden release of high strain energy accumulated in the rock mass in high-stress underground engineering. Its basic characteristics are sudden and strong, causing great harm to construction personnel and equipment on site. So far, there have been many studies on engineering treatment measures for rockburst at home and abroad, includin...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D11/10E21D21/00
Inventor 冯夏庭张传庆周辉吴文平邱士利
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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