Access opening for cutter head of shield tunneling machine and construction method thereof

Abstract

The invention relates to an access opening for a cutter head of a shield tunneling machine and a construction method thereof. The access opening comprises an access opening segment, a positioning andprotecting cylinder, and a plurality of supporting and protecting cylinders, wherein the access opening segment is formed by excavating a soil body and is vertically arranged; the access opening segment is located in front of the advancing direction of the shield tunneling machine; the positioning and protecting cylinder is pressed into the access opening segment; the plurality of supporting and protecting cylinders are pressed into the positioning and protecting cylinder; the adjacent supporting and protecting cylinders are connected in an abutting joint manner; and a section of soil body isexcavated continuously and downwards before the corresponding supporting and protecting cylinders are pressed into the positioning and protecting cylinder, and thus, the access opening is formed in the plurality of supporting and protecting cylinders. The access opening is supported and protected by the supporting and protecting cylinders; and in the formation process of the access opening, aftera section of soil body is excavated, a section of supporting and protecting cylinder is settled. The access opening is supported and protected by using the supporting and protecting cylinders with thehigh strength, so that the deformation of the access opening is avoided in the maintenance of the cutter head, and the operation safety is improved. The access opening effectively solves the problemof the instability of the traditional reinforced concrete structure, and has very high practical value and promotion value.

Description

technical field [0001] The invention relates to the field of underground construction engineering, in particular to an inspection hole of a shield machine cutter head and a construction method thereof. Background technique [0002] As we all know, when shield tunneling is used for long-distance tunnels in urban subways, the cutter head of the shield machine is usually repaired or replaced after a certain distance is excavated by the shield. The inspection channel of the shield tunneling machine shall be constructed after the shield tunneling machine reaches the inspection channel of the shield tunneling machine. For the inspection hole of the shield machine, the traditional construction method is to add concrete (usually C20 early-strength concrete) to the reinforcement (usually ring reinforcement + vertical reinforcement) after manual digging, but it is known from practice that this method The structure of the inspection hole made is very unstable. During the maintenance o...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, provide a shield machine cutter head inspection hole and its construction method, and solve the problem that the existing reinforced concrete inspection hole is easily deformed due to the influence of the cutter head torque during the inspection and maintenance process of the cutter head. , thus bringing safety hazards to the construction

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