Shield tunneling machine with end face freezing system and protection method thereof

Abstract

The invention discloses a shield tunneling machine with an end face freezing system and a protection method thereof. The shield tunneling machine comprises a cutterhead, a front shield, a central rotating body, a quick pipe connecting device and a refrigerator system; at least one cutterhead freezing pipe is arranged on a radial plate of the cutterhead; each cutterhead freezing pipe is embedded into square steel on the inner side of the cutterhead, a cutterhead center block is connected behind the cutterhead, a center revolving body is connected behind the cutterhead center block, the middle of the center revolving body is connected with a main drive, the main drive is connected with the cutterhead, and a center revolving body freezing pipe is connected behind the center revolving body. The beneficial effects of the invention are as follows: the worn cutter of the shield tunneling machine can be replaced in special stratums and special districts where cutter replacement operation cannot be carried out in a conventional method, self-rescue of the shield tunneling machine is achieved, cutter replacement operation of the shield tunneling machine under underground complex geological conditions is improved, the method is not limited by ground space and geological conditions, and the safety of underground space excavation operation is improved.

Description

technical field [0001] The invention relates to the field of normal-pressure tool change by the end face freezing method of a shield machine, in particular to a shield machine with an end face freezing system and a protection method thereof. Background technique [0002] The shield machine is a tunnel boring machine that uses the shield method. The shield construction method is that the tunnel boring machine supports the surrounding rocks through the shield shell and the segment while tunneling, so as to prevent the accident of collapsing into the tunnel. Due to the high degree of automation and fast construction speed, the cutters of the shield machine are often worn and damaged under long-term and high-frequency excavation work. There are two main methods for changing the cutters of the shield machine: one is to The stratum is stable, such as moderately weathered or slightly weathered stratum, to open the cabin for tool change under normal pressure, and the other is to ent...

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Problems solved by technology

[0002] The shield machine is a tunnel boring machine that uses the shield method. The shield construction method is that the tunnel boring machine supports the surrounding rocks through the shield shell and the segment while tunneling, so as to prevent the accident of collapsing into the tunnel. Due to the high degree of automation and fast construction speed, the cutters of the shield machine are often worn and damaged under long-term and high-frequency excavation work. There are two main methods for changing the cutters of the shield machine: one is to The stratum is stable, such as moderately weathered or slightly weathered stratum, to open the cabin for tool change under normal pressure, and the other is to enter the cabin with pressure for tool change. It is not possible to open the cabin under normal pressure for replacement, the pressure on the face face in front of the cutterhead cannot be maintained, and the method of entering the cabin with pressure cannot be used to replace the cutter in areas with poor formation pressure retention characteristics. If there is no space condition for reinforcement from the ground freezing method, However, when the shield machine passes through complex underground strata, the tool is damaged and cannot continue to excavate, the system and components of the shield machine cannot realize the tool change operation using the conventional tool change construction method

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