Shield tail structure of shield machine

Abstract

The present application discloses a shield tail structure of a shield machine, comprising: an outer ring of the shield shell, an inner ring of the shield shell, rolling parts and a transmission part, wherein the rolling parts are arranged between the outer ring of the shield shell and the inner ring of the shield shell, so that the The inner ring of the shield shell can be rotated relative to the outer ring of the shield shell; the transmission part is used for cooperating with the inner ring of the shield shell and the preset rotary drive device, and the rotation of the inner ring of the shield shell is realized by the power generated by the rotary drive device; The inner surface of the circle is provided with at least one shield tail brush groove for placing the shield tail brush. As a result, the shield tail brush can be replaced at a fixed point, saving multiple telescopic jacks, removing all steel supports, and circumferential cutting and welding operations, optimizing operating space, saving manpower and time. Moreover, avoiding the replacement point at the bottom can ensure a relatively dry and clean environment when the shield tail brush is replaced. At the same time, in the process of replacing the shield tail brush, only one steel support needs to be removed, which ensures the uniform distribution of the jack thrust and the pressure balance of the face.

Description

technical field [0001] The present application relates to the field of shield tunnel construction, in particular to a shield tail structure of a shield machine. Background technique [0002] The shield tail is mainly responsible for the sealing of the shield machine and the synchronous grouting function during the tunneling process. Based on the comprehensive action conditions of tunnel construction soil conditions, water pressure and grouting pressure, the shield tail is generally equipped with multiple shield tail brushes, and a grease cavity is formed between the adjacent shield tail brushes and the outer surface of the pre-assembled segment. The immersion of the outermost grouting slurry will cause the shield tail brush to be too rigid, and the brush will compress the segment and cause damage. Therefore, a ring of steel plate bundles is set at the outermost side of the shield tail. [0003] The shield tail brush is pressed in contact with the segment and the grease cham...

AI Technical Summary

Problems solved by technology

[0005] 1. The traditional shield tail structure takes a long time to replace the shield tail brush, which leads to increased downtime of the shield machine, and uneven distribution of shield tail gaps under the action of uneven pressure;

[0006] 2. The elongation of the propulsion jack is limited, and steel support needs to be set up, which hinders the renewal of the shield tail brush;

[0007] 3. Renewing the shield tail brush needs to continuously retract and extend the jack in sequence. As time increases, the pressure of the soil bin will increase, which will easily cause the shield machine to retreat;

[0008] 4. When replacing the shield tail brush at the shield tail, follow the order from top to bottom and from inside to outside. The cyclic operation of tail brush welding, shield tail brush grease application, and recovery point is laborious and greatly affected by the space position, and the construction is very inconvenient;

[0009] 5. The replacement of the shield tail brush requires a relatively clean and dry construction environment, and the bottom of the shield tail is difficult to meet the requirements due to the influx of mud

[0010] For the above technical problems existing in the above-mentioned prior art, no effective solution has been proposed yet

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