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Method for open type TBM to pass through fault fracture zone

A broken zone, open technology, applied in earth-moving drilling, shaft equipment, wellbore lining, etc., can solve the problem of easy jamming of fault broken zone, prevent further deterioration of surrounding rock, improve the working environment, avoid damage to tools and The effect of the cutter head

Active Publication Date: 2021-03-16
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a method for an open TBM to pass through a fault fracture zone, and solve the technical problem in the prior art that an open TBM is difficult to pass through a rock fault fracture zone or is easily stuck in a fault fracture zone

Method used

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  • Method for open type TBM to pass through fault fracture zone
  • Method for open type TBM to pass through fault fracture zone
  • Method for open type TBM to pass through fault fracture zone

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Embodiment 1

[0037] On October 21, 2019, when the TBM at the exit of the Gaoligongshan Tunnel reached the mileage D1K221+544.913, the tail of the shield revealed that the rock mass on the left side of the arch waist was strongly weathered and the integrity was poor. The rock mass was broken into blocks and breccias. Water gushed out from the face and tail of the shield, with a maximum water inflow of 150m³ / h. The loose surrounding rock was washed away by the flowing water, and a large amount of slag was entrained and accumulated to the bottom of the tunnel. At the same time, the face of the face and the tail of the shield continued to collapse, and the TBM was forced to shut down.

[0038] After the TBM excavation was blocked, multiple scupper holes were set up on site to reduce the impact of running water on soaking and scouring of the surrounding rock. However, the scupper holes are easily blocked during the drainage process and cannot guarantee long-term effective drainage. In order to a...

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Abstract

The invention discloses a method for an open type TBM to pass through fault fracture zone. The characteristics of the TBM are fully utilized, on the one hand, unfavorable geology is improved through grouting reinforcement of a shield tail and a cutter head, on the other hand, further deterioration of the unfavorable geology caused by underground water is avoided through water drainage of the shield tail, and meanwhile, the front geology condition is judged through advanced geology detection, and field construction and scheme determination is guided. The method for the open type TBM to pass through fault fracture zone is suitable for TBM over-small fault construction, further suitable for TBM over-large fault construction, the superiority of the TBM is brought into full play, the jamming risk is reduced, and compared with a traditional hole surrounding method for TBM over-fault construction, the construction period, the cost, the safety and the quality are all controllable.

Description

technical field [0001] The invention relates to the technical field of TBM construction, in particular to a method for an open TBM to pass through a fault fracture zone. Background technique [0002] tunnel boring machine ( Tunnel Boring Machine , TBM) is a comprehensive equipment that uses mechanical rock breaking, slag removal and support for continuous operation. TBM construction has the following advantages: [0003] 1. High excavation efficiency: continuous operation can ensure one-stop operation of rock breaking, slag removal and support; especially in long-distance construction in stable surrounding rock, the advantages are more obvious; 2. Less excavation and good construction quality: super The amount of excavation is small, the inner wall is smooth, there is no concave-convex phenomenon, the amount of support works, and the cost of the project are reduced; 3. Small disturbance to the rock: it can improve the construction conditions of the excavation surface; the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/06E21D9/04E21D9/00E21D11/10E21D11/15E21D11/18E21F16/02
CPCE21D9/06E21D9/0607E21D9/04E21D9/001E21D11/10E21D11/152E21D11/18E21F16/02
Inventor 王亚锋胡新朋宿源麟马亮邢迅柯郑清君曹耀祖陈阳李福才刘飞车大兵李红
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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