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Multifunctional rock tunnel boring machine support system and method

A tunnel boring machine, multi-functional technology, applied in the direction of tunnel, tunnel lining, earthwork drilling and mining, etc., can solve the problems of harsh tunnel operating environment, high labor intensity, casualties, etc., to improve the tunnel operating environment, and the use method is simple and effective , Improve the effect of construction efficiency

Inactive Publication Date: 2019-09-27
CHINA RAILWAY TUNNEL GROUP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when the open TBM is excavating in weak and broken ground, steel arches, steel mesh, anchor rods and other operations can be carried out in time after the surrounding rock comes out of the shield, but the position of the wet shotcrete is often more than 50m away from the shield. As a result, the surrounding rock cannot be closed in time; in order to seal the surrounding rock in time, artificial dry spraying or tidal spraying is also used to spray concrete, but the labor intensity is high, and the tunnel operating environment is harsh
In addition, when the open TBM is excavating in a broken or rockburst formation, the support method of the new Austrian method cannot control the fall of the cracked surrounding rock, resulting in smashed machines, casualties, and a large amount of slag removal at the bottom of the tunnel, which is a serious problem. Restricted the construction progress of the open TBM

Method used

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  • Multifunctional rock tunnel boring machine support system and method
  • Multifunctional rock tunnel boring machine support system and method
  • Multifunctional rock tunnel boring machine support system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as Figure 1-7 As shown, a multi-functional rock tunnel boring machine support system includes a shield 2, a steel arch installer 3, a front spray mixer 5, a segment installer 6 and a bolter 8; the shield 2. It is set between the front part of the main beam 10 of the roadheader and the cutter head 1. The steel arch installer 3, the front mixer 5, the segment installer 6 and the bolter 8 can be slidably arranged in sequence. On the main beam 10 on the rear side of the shield 2, the steel arch installer 3 and the front spray mixer 5 are arranged adjacently.

[0036] Two sets of sliding rails 9 are respectively symmetrically arranged on both sides of the main beam 10; the steel arch installer 3 and the front spray mixer 5 share a set of sliding rails 9, and the segment installer 6 and The bolter rig 8 shares a set of slide rails 9; the steel arch installer 3, the pre-type spray mixer 5, the annular mobile frame 16 and the bolt drill 8 are all equipped with a sliding ...

Embodiment 2

[0042] A method for supporting a multifunctional rock tunnel boring machine, aimed at surrounding rocks with better integrity, comprising the following steps:

[0043] (1) After the surrounding rock is excavated by the cutter head 1 of the roadheader, it is temporarily supported by the shield 2; when the surrounding rock leaks out of the shield 2, the steel arch installer 3 assembles the annular arch 4 at a certain distance;

[0044] (2) Bolting rig 8 sets bolts along the radial direction of the tunnel, so that the annular arch frame is fixed with the surrounding rock through the bolts;

[0045] (3) Lap the steel bar row and steel mesh between two adjacent ring-shaped arch frames, and then use the pre-type spray mixer 5 to spray concrete to seal the surrounding rock of the tunnel in time to complete the supporting of the surrounding rock.

Embodiment 3

[0047] A method for supporting a multifunctional rock tunnel boring machine, aimed at surrounding rocks with poor integrity, comprising the following steps:

[0048] (1) After the surrounding rock is excavated by the cutter head 1 of the roadheader, it is temporarily supported by the shield 2; when the surrounding rock leaks out of the shield 2, the segment installer 6 assembles the continuous closed segments;

[0049] (2) After the segment is closed, the pre-type spray mixer 5 is connected to the grouting hole of the segment through the pipeline, and the gap between the segment and the surrounding rock is filled in time to complete the supporting of the surrounding rock.

[0050] The multi-functional rock tunnel boring machine support system and support method of the present invention integrates multiple support methods, can realize the joint use of multiple support methods, enhances the adaptability of the roadheader to different strata, and can realize The timely sealing of...

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Abstract

The invention discloses a multifunctional rock tunnel boring machine support system and method. The support system comprises a shield, a steel arch mounting machine, a front-mounted mixed spraying machine, a segment mounting machine and a roof bolt driller. The shield is disposed between the front part of a main beam of the boring machine and a cutter head, and the steel arch mounting machine, the front-mounted mixed spraying machine, the segment mounting machine and the roof bolt driller are sequentially and slidably disposed on a main beam on the rear side of the shield; the steel arch mounting machine and the front-mounted mixed spraying machine are disposed in an adjacent mode; and a segment feeding machine is arranged below the roof bolt driller, and the segment feeding machine is connected with the boring machine through a traction mechanism. The multifunctional rock tunnel boring machine support system and method integrate various supporting methods, can realize the combined use of various supporting methods, enhance the adaptability of a open type TBM to the weak broken stratum, can realize the timely sealing of the surrounding rock, and improve the driving efficiency and the supporting strength.

Description

technical field [0001] The invention relates to the technical field of rock tunnel boring machines, in particular to a support system and a support method for a multifunctional rock tunnel boring machine. Background technique [0002] The rock tunnel boring machine (TBM) is an advanced mountain tunnel construction machine. The open TBM uses the disc-shaped hob on the rotating cutter head to roll and break the rock, but the support method still adopts the initial support of the new Austrian method. Forms, that is, primary support with shotcrete, anchor rods, steel mesh, steel supports, etc. At present, when the open TBM is excavating in weak and broken ground, steel arches, steel mesh, anchor rods and other operations can be carried out in time after the surrounding rock comes out of the shield, but the position of the wet shotcrete is often more than 50m away from the shield. As a result, the surrounding rock cannot be closed in time; in order to seal the surrounding rock i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/087E21D11/08E21D11/10E21D11/18E21D11/40E21D20/02
CPCE21D11/08E21D11/10E21D11/18E21D11/40E21D20/02E21D9/0873
Inventor 洪开荣孙振川杨延栋陈馈李凤远张兵马亮韩伟锋刘俊成赵海雷王利明李宏波张合沛秦银平
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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