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Jet assisted shield tunneling machine for noncircular-section tunneling construction

A shield machine and cross-section technology, which is applied in tunnels, mining equipment, earthwork drilling and mining, etc., can solve the problems of extrusion into the inner wall of the soil bin, high manufacturing and assembly precision requirements, and high cost, so as to simplify the structure of the shield machine and avoid poor versatility , Promote the effect of low power consumption

Active Publication Date: 2017-08-25
CHINA RAILWAY CONSTR HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In tunnel construction, tunnels with non-circular cross-section requirements are often encountered. Existing excavation methods usually use multiple circular cutter heads to fit non-circular cross-sections, but there will be non-overlapping gaps between the cutter heads. Part of it is mainly at the straight line of the section. At this time, the remaining soil at the bottom of the section can be easily removed because it is close to the soil discharge and slag discharge device, while the remaining soil at the top and side of the section will be squeezed into the inner wall of the soil bin during the advancement of the front shield. The soft soil will adhere and harden on the inner wall of the soil bin, making it difficult for the cutter head to rotate and the shield machine to advance
[0003] In order to solve the above technical problems, the existing method is to use a mechanical root cleaning device to scrape off the soil adhered to the inner wall by using a movable blade. All adhered and compacted soft soils are effectively removed, which poses safety hazards; and the root cleaning device needs to be specially equipped according to the model, which has poor versatility and high cost. At the same time, its structure is complex and requires high manufacturing and assembly precision.

Method used

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  • Jet assisted shield tunneling machine for noncircular-section tunneling construction
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  • Jet assisted shield tunneling machine for noncircular-section tunneling construction

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0031] Such as figure 1 As shown, the jet-assisted shield machine for non-circular cross-section excavation construction in this embodiment includes a front shield 1, a plurality of cutter heads 2 and a jet flow assembly 3, and a plurality of cutter heads 2 are arranged on the end face of the front shield 1, and the jet flow The assembly 3 is also arranged on the end face of the front shield 1, and the jet assembly 3 and the cutter head 2 are arranged in a staggered manner. The spray stroke of the jet assembly 3 covers the cutting blind area 21 of the cutter head 2. 5 Strip broken from the formation and discharge. In the present invention, a jet assembly 3 is provided on the end face of the front shield 1, and the jet assembly 3 and the cutter head 2 are arrang...

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Abstract

The invention provides a jet assisted shield tunneling machine for noncircular-section tunneling construction. The machine comprises an anterior shield and multiple cutter heads arranged on the end surface of the anterior shield and further comprises a jet assembly used for cutting section soil layers in an area where the cutter heads cannot perform cutting, the jet assembly is arranged on the end surface of the anterior shield and staggered with the cutter heads, and the jetting travel of the jet assembly covers the cutting blind zones of the cutter heads. The jet assisted shield tunneling machine has the advantages of effective cutting of noncircular sections, high tunneling safety, high universality and the like.

Description

technical field [0001] The invention relates to the field of tunnel excavation, in particular to a jet-assisted shield machine used for excavation construction of non-circular section tunnels. Background technique [0002] In tunnel construction, tunnels with non-circular cross-section requirements are often encountered. Existing excavation methods usually use multiple circular cutter heads to fit non-circular cross-sections, but there will be non-overlapping gaps between the cutter heads. Part of it is mainly at the straight line of the section. At this time, the remaining soil at the bottom of the section can be easily removed because it is close to the soil discharge and slag discharge device, while the remaining soil at the top and side of the section will be squeezed into the inner wall of the soil bin during the advancement of the front shield. The soft soil will adhere and harden on the inner wall of the soil bin, making it difficult for the cutter head to rotate and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/08
CPCE21D9/08Y02E10/20
Inventor 刘飞香程永亮唐崇茂祝爽
Owner CHINA RAILWAY CONSTR HEAVY IND
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