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Super-large diameter shield cutterhead system used in hard-soft heterogeneous ground

A technology with super large diameter and uneven hardness, which is applied in mining equipment, earthwork drilling, tunnels, etc. It can solve the difficulties of large-diameter main bearing processing and manufacturing, poor working stability of the shield machine, and uneven force on the cutterhead, etc. problems, to achieve the effects of excavation in grades of rock and soil, increasing the free surface of rock and soil, and saving costs

Pending Publication Date: 2017-06-30
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the phenomenon of “unbalanced load” caused by the uneven force on the cutter head in the super-large diameter shield in the soft and hard stratum in the above-mentioned prior art, the poor working stability of the shield machine and the difficulty in manufacturing the large-diameter main bearing The present invention proposes a staggered distribution of multi-layer cutterhead space, and each cutterhead can be controlled independently, thereby improving the excavation efficiency, accuracy and stability of super-large-diameter shield tunneling in the construction of soft and hard uneven ground.

Method used

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  • Super-large diameter shield cutterhead system used in hard-soft heterogeneous ground
  • Super-large diameter shield cutterhead system used in hard-soft heterogeneous ground
  • Super-large diameter shield cutterhead system used in hard-soft heterogeneous ground

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention will be further described:

[0023] like figure 1 , figure 2 As shown, a shield cutterhead system with a super large diameter for soft and hard uneven formations includes large cutterheads, medium cutterheads, small cutterheads, spokes, panels, hobs, cutters, leading knives, center knives, stirring Rods, reducers, hydraulic motors, power transmission devices, shields, screw excavation devices. It is characterized in that the front cutterhead structure of the shield machine consists of nine cutterheads distributed in a spatially staggered structure, including large cutterheads, medium-sized cutterheads, and small cutterheads. The first stage of the cutterhead structure is a medium-sized cutterhead, and one medium-sized cutterhead is located at the center of the shield cutterhead structure; the second stage of the cutterhead structure is a small cutterhead, and there are four small cutterheads along ...

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Abstract

The invention discloses a super-large diameter shield cutterhead system used in a hard-soft heterogeneous ground. The super-large diameter shield cutterhead system comprises large-size cutterheads, a medium-size cutterhead, small-size cutterheads, spokes, a panel, a hob, a cutting knife, a leading knife, a center knife, a stirring rod, a reducer, a hydraulic motor, a power transmitting device, a shield and a spiral unearthing device; the front end cutterhead of the shield is nine cutterheads which are formed and arranged in a spatial crossing structure, and is divided into four-order cutterheads including the large-size cutterheads, the medium-size cutterhead, and the small-size cutterheads; the four-order cutterheads comprises a first-order cutterhead, second-order cutterheads, third-order cutterheads, and fourth-order cutterheads. According to the super-large diameter shield cutterhead system used in the hard-soft heterogeneous ground, multiple layers of cutterheads are distributed in a spatial crossing mode, each cutterhead can achieve individual control, and thus the excavation efficiency, precision and stability of the super-large diameter shield in construction of the hard-soft heterogeneous ground are improved. The use of a large diameter mainshaft bearing is prevented, and the manufacturing difficulty and transportation cost are lowered; through the adoption of the multiple layers of the cutterheads, loads of each part are lowered, and the service life of relevant parts of the cutterheads is prolonged.

Description

technical field [0001] The invention relates to the technical field of special engineering equipment for tunnels, in particular to an ultra-large-diameter shield machine cutter head system used in soft and hard uneven strata. Background technique [0002] Shield boring machine is a large-scale construction equipment used in tunnel excavation. It has the advantages of fast excavation speed, high quality and environmental protection, economical and labor-saving, safe and reliable, and has been widely used in subway highways and municipal hydropower tunnel projects. Among them, the cutter head is an important part of the shield excavation construction. Its main function is to cut the soil layer and play a certain role in supporting the excavation surface; therefore, the design rationality of the cutter head structure directly affects the tunnel construction quality and the use of the shield machine. life. [0003] With the increase in the scale of projects such as large-diamet...

Claims

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Application Information

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IPC IPC(8): E21D9/08
CPCE21D9/08
Inventor 陈馈李阁强张迅孙振川张兵牛彦杰
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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