Large-diameter earth pressure balance shield machine

An earth pressure balance and shield machine technology, applied in the field of shield machines, can solve the problems of reducing the working efficiency of the shield machine, decreasing the driving speed, and the deflection of the tunnel axis, so as to speed up the propulsion speed and work efficiency, and reduce the propulsion force. , the effect of reducing the chance of slush cake
CN101798928AInactive Publication Date: 2010-08-11SHANGHAI LIXING ENG TECH DEV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI LIXING ENG TECH DEV
Publication Date
2010-08-11
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a large-diameter earth pressure balance shield machine. The machine comprises a cutterhead, a cutterhead drive part, a propulsion oil cylinder, an erector, spiral conveyors and a frame; the cutterhead is a double-cutterhead which comprises a peripheral large cutterhead and an independent central cutterhead; the cutterhead drive part comprises two driving mechanisms which drive the peripheral large cutterhead and the independent central cutterhead respectively; and the peripheral large cutterhead and the independent central cutterhead rotate independently and bidirectionally. Compared with the prior art, the shield machine adopts the double-cutterhead design, greatly optimizes a cutting speed of the cutterhead on a soil body, further improves a propulsion speed of the shield, optimizes the disturbance effect of the cutterhead on the soil body, and prevents the rolling of a shield machine body; different opening rates are designed on the cutterhead and are suitable for different situations of a central part and a peripheral part when a tunnel is advanced; and three spiral conveyors discharge soil, effectively control the posture of the shield, and prevent the deviation of a tunnel axis.
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Description

technical field

[0001] The invention relates to a shield machine, in particular to a large-diameter earth pressure balance shield machine. Background technique

[0002] At present, shield machines used in the world generally use a single cutter head for soil cutting. In actual use, the shield machine with a single cutter head has the following problems:

[0003] 1. The rolling problem of the shield body

[0004] (1) The rolling of the shield body is a phenomenon that the shield body rolls because the torque generated by the cutterhead is greater than the frictional moment between the shell of the shield machine and the tunnel wall when the cutterhead cuts the soil on the excavation surface. In some special formations, such as two formations with large differences in structure and strength, the upper layer is a soft soil layer and the lower layer is a hard rock layer. When the shield tunnels at the interface between the two strata, due to the large difference in lithology ...

Claims

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