Cutting device of earth pressure balance pipe jacking machine

Abstract

The invention discloses a cutting device of an earth pressure balance pipe jacking machine, comprising: a cutting cutter head, which is provided with a cutting tool and a soil conveying port; The soil conveying bin connected with the mouth, and the inside of the soil conveying bin is provided with a screw rod; the mixing bin which is fixedly connected to the soil conveying bin and communicated with the soil conveying bin, and the mixing bin is provided with a The water injection hole and the mud outlet, the inside of the mixing chamber are equipped with a stirring mechanism connected to the screw rod by transmission and a mud discharge mechanism arranged at the mud outlet. The soil cut by the cutting cutter head enters the soil conveying chamber through the soil conveying port, and then the soil is conveyed to the mixing chamber through the screw rod, and then water is injected into the mixing chamber from the water injection hole, and the soil and water are stirred by the stirring mechanism at the same time. into muddy water, and finally the muddy water is discharged from the mud outlet through the mud discharge mechanism. Utilizing the characteristics of stable earth pressure balance and good mud-water balance, it avoids the problem of workers going deep into the pipeline for construction.

Description

technical field [0001] The invention relates to an earth pressure balance pipe jacking machine, in particular to a cutting device of the earth pressure balance pipe jacking machine. Background technique [0002] The pipe curtain construction method is a kind of non-excavation technology. As a construction technology of using small-diameter pipe jacking machines to construct large-section underground spaces, it has developed for more than 20 years abroad. It is a relatively mature construction method used in excavation projects under roads, railways, structures, airports, etc. in Japan, the United States, Singapore and Chinese Taipei. [0003] At present, the pipe jacking machine is an important construction equipment for the pipe curtain construction method, and its application is very common. Earth pressure balance pipe jacking machines are especially common because auxiliary construction measures such as soil reinforcement are basically not used in construction, which sav...

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Problems solved by technology

[0004] However, due to the generally small diameter of pipe jacking machines, the problem of excavation of earth pressure balance equipment is exposed. Generally speaking, for pipe jacking machines with a diameter of 1m, it becomes extremely difficult for staff to enter the pipe to assist in excavation, and this difficulty will increase. Becomes more prominent as engineering progresses

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