Replacing method of shield tail brushes of super-large-diameter shield machine under high water pressure condition

Abstract

The invention provides a replacing method of shield tail brushes of a super-large-diameter shield machine under a high water pressure condition. In the propelling process of last ring pipe pieces before shutdown, in addition to the last ring pipe piece before shutdown, gaps between a shield tail and the pipe pieces is filled with elastic water absorbing materials or elastic waterproof materials; in the propelling process of the last ring pipe pieces before shutdown, ordinary grease is injected into a grease cavity of the shield tail brushes in a pressure mode, and the other grease cavities of other shield tail brushes of the super-large-diameter shield machine are injected with waterproof grease in a pressure mode; in the replacement position, a mud tank of the super-large-diameter shield machine is subjected to new slurry replacement; and in the replacement position, a shield shell hoop of the super-large-diameter shield machine is injected with filling slurry body in a pressure mode. Preferably, the shield tail brushes are detachable. According to the replacing method of the shield tail brushes of the super-large-diameter shield machine under the high water pressure condition, replacement of the shield tail brushes under the high water pressure condition is easy, safe, stable and efficient, the problem that replacement of the shield tail brushes of the super-large-diameter shield machine under the high water pressure condition is difficult can be solved, design is ingenious, construction is simple, convenient, safe and efficient, and large-scale application and promotion is adaptable.

Description

technical field [0001] The invention relates to the technical field of tunnel shield construction, in particular to the technical field of shield tail brush replacement of a shield machine, and specifically refers to a method for replacing the shield tail brush of a super-large-diameter shield machine under high water pressure conditions. Background technique [0002] In recent years, with the rapid development of domestic urban infrastructure, more and more super-large-diameter highway tunnels across rivers and seas have been constructed, and the construction of tunnels has gradually developed in the direction of large diameters and large buried depths. [0003] Shield method construction technology has the advantages of high degree of mechanization, high tunnel quality, and little impact on the surrounding environment. For shields with a diameter greater than 15m, the shield tail seal is one of the important lifelines of the shield machine. It is mainly composed of several...

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the above-mentioned shortcomings in the prior art, an object of the present invention is to provide a method for replacing the shield tail brush of an ultra-large diameter shield machine under high water pressure conditions, which can enable the replacement of the shield tail brush under high water pressure conditions It is simple, safe, stable and efficient, and can solve the problem of difficult replacement of shield tail brushes for super-large diameter shield machines in high water pressure environments, and is suitable for large-scale promotion and application

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