Shield tunneling machine with mud water mode and earth pressure mode

Abstract

The invention discloses a shield tunneling machine with a mud water mode and an earth pressure mode. The shield tunneling machine comprises a mud water chamber, an air cushion chamber, a hydraulic communication valve, a screw conveyor, a mud box, a belt conveyor, a mud inlet pipeline, a mud discharge pipeline, a first circulating flushing pipeline and a second circulating flushing pipeline, wherein the mud water chamber is arranged between a cutter head and a shield body; the air cushion chamber is disposed between the mud water chamber and the shield body; the hydraulic communication valve isarranged between the mud water chamber and the air cushion chamber; the inlet of the screw conveyor connected to the bottom of the mud water chamber; the mud box and the belt conveyor are detachablyconnected to the outlet of the screw conveyor; the first circulating flushing pipeline can deliver the mud in the mud inlet pipeline to the central portion of the cutter head, and the second circulating flushing pipeline can deliver the mud in the mud box to the mud water chamber and the air cushion chamber. When the shield tunneling machine is in the mud water work mode, the hydraulic communication valve is turned on, the mud water chamber communicates with the air cushion chamber, and the outlet of the screw conveyor is connected to the mud box; when the shield tunneling machine is in the earth pressure work mode, the hydraulic communication valve is turned off, the mud water chamber blocks the air cushion chamber, and the outlet of the screw conveyor is connected to the belt conveyor. The shield tunneling machine has the advantages of wide applicable stratum range, multiple functions of the tunneling mode, high precision of pressure control and the like.

Description

technical field [0001] The invention relates to a mud-water-soil-pressure dual-mode shield machine, which belongs to the field of mud-water shield machines for tunnel construction. Background technique [0002] Shield machines are usually divided into two categories: slurry balance shield machines and earth pressure balance shield machines. When the permeability coefficient of the soil in the tunnel construction area is large, the mud-water balance shield machine is commonly used, and when the permeability coefficient is small, the earth pressure balance shield machine is commonly used. With the continuous development of the tunnel industry, construction personnel will gradually encounter more and more complex and changeable strata. For example, some intervals have to cross rivers, but also cross silty clay, silt, etc.; some intervals have both limestone formations and karst formations. In the face of these complex and changeable strata, the traditional single-mode mud-wat...

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Problems solved by technology

In the face of these complex and changeable strata, the traditional single-mode mud-water shield machine or earth-pressure shield machine can no longer meet the requirements of excavation. It is urgent to develop a mud-water-earth pressure dual-mode shield machine, which has both It has the characteristics of the TBM machine and the function of the earth pressure balance shield machine, which can flexibly switch the construction mode according to the specific stratum conditions, so that it is effectively applicable to complex and changeable stratums.

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