Pipe segment diameter adjustable hard rock tunneling machine adopting double-layer supporting mode and construction method thereof

A technology of hard rock roadheader and construction method, which is applied in earthwork drilling, wellbore lining, tunnel lining, etc. It can solve problems such as not solving the problem of stuck shield from the root, and achieve saving time and labor, reasonable structural design, The effect of improving stability

Active Publication Date: 2015-07-01
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these technologies and methods can solve the card shield problem from the root, and they are all countermeasures taken after the card shield problem occurs.

Method used

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  • Pipe segment diameter adjustable hard rock tunneling machine adopting double-layer supporting mode and construction method thereof
  • Pipe segment diameter adjustable hard rock tunneling machine adopting double-layer supporting mode and construction method thereof
  • Pipe segment diameter adjustable hard rock tunneling machine adopting double-layer supporting mode and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment one: see Figure 1-Figure 4 , a hard rock tunneling machine with double-layer support and variable segment diameter, including an expansion cutterhead 1, a main drive 2 for driving the expansion cutterhead 1 to excavate, and a main girder connected to the rear end of the main drive 2 3. Temporary support and radially retractable circular shield 4. The connecting box 5 and the sliding girder 7 that support the main propulsion cylinder 6 and the sliding girder 7 are arranged behind the main girder 3, and a flexible steel arch is arranged on the main girder 3 Frame assembly machine 8, the sliding girder 7 is provided with a segment assembly machine 9, the expanded excavation cutterhead 1 includes an expanded excavation cutterhead body 101 and a different angle around the expansion cutterhead body 101 A series of digging hobs 102, the said hob 102 is set on the digging cutter body 101 through the digging hob seat 103, the hob seat 103 is hinged with the digging c...

Embodiment 2

[0036] Embodiment two: see Figure 1-Figure 4 , a construction method using a hard rock roadheader with double-layer support and variable segment diameter, for the tunnel construction section with large deformation of surrounding rock and easy collapse, prefabricated by flexible steel arch frame and rigid concrete The construction is carried out in the double-layer support method with the mutual cooperation of the segments. The diameter of the excavation section is φ1=8000mm when the non-expanding excavation is required. When the double-layer support is required, the diameter of the expansion excavation is increased to φ2=8600mm to meet the double-layer support standard. As an example, it includes the following steps:

[0037] ①Through advanced detection technology, the rock and soil stress in front of the excavated tunnel support face is detected and analyzed, and it is determined that the pre-construction section needs double-layer support work;

[0038] ②Adjust the 3 expan...

Embodiment 3

[0043] Embodiment three: see Figure 1-Figure 4 , the method of this embodiment is aimed at another situation existing in the tunnel excavation process in the second embodiment, that is, in step ①, when the detection and analysis results show that the deformation of the surrounding rock in the pre-construction section is small, no double-layer When the support operation requires only a small amount of excavation to satisfy the stress release of the surrounding rock, the expansion of the excavation cutter head can be reduced by adjusting the expansion cylinder of the expansion cutter head, and at the same time, the prefabricated segment Appropriately adjust the outer diameter size, and directly assemble the prefabricated segments, so that there is a certain size difference between the tunnel excavation diameter and the outer diameter of the prefabricated segments and form a stress relief cavity, which serves as the surrounding rock convergence point Need space.

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Abstract

The invention discloses a pipe segment diameter adjustable hard rock tunneling machine adopting a double-layer supporting mode and a construction method thereof. The pipe segment diameter adjustable hard rock tunneling machine comprises a cutter disc capable of performing expanded excavation, a round shield capable of extending radially, a flexible steel arch frame splicing machine, a pipe segment splicing machine and the like. The hard rock tunneling machine creatively enables shield clamping to be nipped in the bud through coordinative operation of expanded excavation, flexible supporting, pipe segment supporting, pea gravel filling, grouting and other processes in the high-stress formation tunneling process, and meanwhile lining operation of a hard rock tunnel can be completed from beginning to end without stopping in a mechanical mode. Therefore, the shield clamping problem of the hard rock tunneling machine can be avoided, further the tunneling efficiency is improved, and the lining time and the amount of used labor of the hard rock tunnel can be also decreased.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a hard rock tunneling machine with double-layer support and variable segment diameter and a construction method thereof. Background technique [0002] Due to the needs of my country's modernization development, tunnel construction has been widely used in many fields such as transportation, water conservancy, communication, and metallurgy. Many tunnels have the characteristics of long, large, deep burial, and complex geological conditions, and the hard rock tunnel boring machine (TBM) is widely used due to its advantages such as wide range of rock hardness, good working environment, high degree of informatization, and efficient construction. Used in tunnel construction. [0003] When the shield type hard rock tunnel boring machine passes through the poor surrounding rock, especially through the fault fracture zone of the deep-buried long tunnel, the deformation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08E21D11/08E21D11/10
CPCE21D9/08E21D11/08E21D11/18
Inventor 李建斌刘晓恒贺飞
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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