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A method for passing a large-diameter tbm through a small-diameter tunnel

A small-diameter, large-diameter technology, which is applied in the field of large-diameter TBMs passing through small-diameter tunnels, can solve problems such as heavy workload, and achieve the effects of ensuring stability, shortening the construction period, and reducing the time for dismantling and transitioning

Active Publication Date: 2022-04-19
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for a large-diameter TBM to pass through a small-diameter tunnel, so as to solve the problem that in the prior art, when the TBM reaches the small-diameter section and cannot pass through, the TBM needs to be dismantled and dismantled before being transferred, resulting in relatively heavy workload. big technical problem

Method used

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  • A method for passing a large-diameter tbm through a small-diameter tunnel
  • A method for passing a large-diameter tbm through a small-diameter tunnel
  • A method for passing a large-diameter tbm through a small-diameter tunnel

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Embodiment 1

[0030] Such as figure 1 As shown, the TBM passes through the first excavation section 11, the first step-in cavern 12, the demolition cavern 13, the second step-in cavern 14, the small-diameter tunnel 15, and the third step from right to left when stepping. The entry cavern 16, the assembly cavern 17, the fourth step-in cavern 18 and the second excavation section 19, the above-mentioned caverns are connected in sequence. Wherein, the small-diameter tunnel 15 has a circular section.

[0031] Such as Figure 2 to Figure 7 As shown, the front portion of the shield 2 is provided with a cutterhead 1, and the shield 2 includes a top shield 201, a top side shield 202, a bottom side shield 203 and a large-sized bottom shield 204, wherein the top side shield 202 Together with the bottom side shield 203, the side shield is formed; the large-size stepping mechanism 5 includes a large-size outer sliding support 501, a large-size inner sliding support 502, a shield support 503, a lifting...

Embodiment 2

[0043] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the main drive support 601 of the small-sized stepping mechanism 6 is used to prop up the main engine of the TBM to disassemble the large-sized bottom shield 204 and the large-sized stepping mechanism 5 . In this embodiment, a crane is used to prop up the main body of the TBM to disassemble the large-size bottom shield and the large-size stepping mechanism.

Embodiment 3

[0045] The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the main drive support 601 is detachably connected to the main drive 3 to facilitate the detachment of the main drive support 601 . In this embodiment, the main drive support is welded to the main drive, and when it needs to be disassembled, it is cut off with a cutting machine.

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Abstract

The invention relates to a method for a large-diameter TBM to pass through a small-diameter tunnel. The method for a large-diameter TBM to pass through a small-diameter tunnel includes the following steps: 1) After the first excavation section is penetrated, the TBM steps into the dismantling cavern; Shield, large-size bottom shield, large-size stepping mechanism and large-size support shoe, and install small-size bottom shield, small-size stepping mechanism and small-size support shoe; then step the TBM to the small-diameter tunnel opening; 2) Remove the small-sized stepping mechanism, and in the small-diameter tunnel, the TBM steps through the small-diameter tunnel; 3) Install the small-sized stepping mechanism on the TBM, and step the TBM into the assembly cave; in the assembly cavern, remove the small-sized Bottom shield, small-size stepping mechanism and small-size support shoe, and install cutterhead side blocks, top shield, side shield, large-size bottom shield, large-size stepping mechanism and large-size support shoe; then install the TBM Step to the face of the second excavation section.

Description

technical field [0001] The invention relates to a method for a large-diameter TBM to pass through a small-diameter tunnel. Background technique [0002] With the massive progress of national infrastructure construction, the full-face rock tunnel boring machine (abbreviated as TBM), as a special construction machine for tunnel excavation, has been widely used in railway, highway, municipal, hydropower and other tunnel projects. For long-distance tunnels, the tunnel is often divided into multiple sections for construction. After the excavation and lining of some sections are completed first, if the excavation diameter of this section is smaller than that of other sections, the TBM will impassable. At present, the TBM needs to be dismantled and dismantled, then transferred to another site, bypassing the smaller-diameter section, reassembled and debugged, and continue to excavate the next section. Restricting the construction period of the tunnel. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/087
CPCE21D9/087
Inventor 贾连辉张文艳贺飞尹威华张喜冬席杰任梓恒
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD