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TBM cutterhead aiming at complete hard rock

A cutter head and hard rock technology, applied in mining equipment, tunnels, earth-moving drilling, etc., can solve problems such as lack of adaptability, and achieve the effect of reducing the difficulty of rock breaking, reducing construction costs, and improving rock breaking efficiency.

Pending Publication Date: 2020-05-26
CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent discloses a structure in which the size of the protruding cutterhead main body surface of the tooth cutter, shell cutter and cutter is successively reduced, the cutterhead with this structure can only be used in soft soil formations, and under complete hard rock geological conditions not adaptable

Method used

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  • TBM cutterhead aiming at complete hard rock
  • TBM cutterhead aiming at complete hard rock
  • TBM cutterhead aiming at complete hard rock

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: as figure 1 , 2 , 3 and 4, a kind of TBM cutterhead for complete hard rock includes a cutterhead body 1, a hob is arranged on the front panel 5 of the cutterhead body 1, and the hob is radially directed from the center to The edge is arranged, and the center is high and the edge is low in a stepped distribution with a certain distance between the knives.

[0022] from Figure 4 The relationship between the knife height curve 7 and the knife height comparison line 8 can be clearly seen in the figure.

[0023] To further describe, the front panel 5 of the cutter body 1 is in the shape of a truncated cone, and the hobs are spirally distributed on the front panel 5 of the cutter body 1 .

[0024] During the excavation process, the center cutter 2 breaks the rock in advance, and the hob near the center breaks the rock first, providing a free free surface on one side for the adjacent hob to break the rock. Each hob breaks the rock on the corresponding step. ...

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PUM

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Abstract

The invention discloses a TBM cutterhead aiming at a complete hard rock. The TBM cutterhead comprises a cutterhead body (1), wherein hobs are arranged on the upper end face of the cutterhead body (1),are arranged from the center to the edge in the radial direction, and are in stepped distribution high in center and low in edge at certain intervals. The TBM cutterhead has the advantages of being skillful in structural arrangement, practical and reliable, and low in cost, aims at the complete hard rock, effectively lowers the rock breaking difficulty, improves the rock breaking efficiency, shortens the construction period and reduces the construction cost.

Description

technical field [0001] The invention relates to a cutter head for TBM, in particular to a TBM cutter head for complete hard rock. Background technique [0002] At present, in the process of TBM (tunnel boring machine) construction, complete hard rock is often encountered. Due to the existence of complete hard rock, the efficiency of TBM excavation is very low, which seriously affects the tunnel construction period and cost. [0003] In order to improve the excavation efficiency, technical measures such as reducing the distance between the cutters, increasing the thrust, using large-diameter hobs, water-jet-assisted rock breaking, microwave-assisted rock-breaking, ultrasonic-assisted rock-breaking, and artificial joints are often used. It is feasible, but these technologies either have certain limitations, or have not been verified by engineering practice, and do not yet have the conditions for industrialization. [0004] In CN207063984, a utility model patent titled "a comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/11
CPCE21D9/112
Inventor 齐梦学夏毅敏胡恒千苗斌单军周雁领杨国清张海波彭海宇张帅华许天珍
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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