Shield method contact channel starting tunnel portal steel sleeve adapting structure and mounting method thereof

Abstract

The invention discloses a shield method contact channel starting tunnel portal steel sleeve adapting structure and a mounting method thereof. The structure is characterized in that a steel sleeve applied to shield method contact channel starting tunnel portal construction is split into a sleeve body and an adapting cylinder positioned at the front end of the sleeve body, a front end opening of theadapting cylinder is mounted at a tunnel opening in a welded manner, a flange structure is arranged between a tail end opening of the adapting cylinder and a front end opening of the sleeve body, andbolts are used for connection in the flange structure. The mounting success rate of the tunnel opening of a steel sleeve contact channel starting tunnel portal can be effectively increased, thermal deformation of the steel sleeve is avoided, project quality is ensured, and project schedule is improved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction by shield tunneling method, and more specifically relates to a steel sleeve receiving structure and an installation method thereof at a starting portal used in the construction of a shield tunneling tunnel. Background technique [0002] The construction technology of the communication channel by the shield method is a new technology in the field of communication channel construction. It is to apply the tunnel construction technology of the shield method to the construction of the communication channel to ensure the safety and efficiency of the communication channel construction. [0003] The communication channel is set between the upper and lower tunnel lines, so that the upper and lower tunnel lines can be penetrated, which is an important guarantee for the safe operation of the tunnel. to the other side of the tunnel to receive. In order to ensure the waterproof effect of the porta...

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Problems solved by technology

[0004] like Figure 4 and Figure 5 As shown, a "T"-shaped interface is formed between the main line tunnel 7 and the communication channel 8. For the subway shield tunnel lined with a conventional φ5500mm inner diameter, the opening diameter of the communication channel of the shield method is φ3400mm. Therefore, the steel sleeve 1 and The interface between the starting portals 4 of the communication passage is a hyperboloid shape formed by the intersection of the large-diameter subway shield tunnel and the opening of the small-diameter communication passage; It is difficult to ensure the good alignment of the hyperboloid-shaped socket at the door no matter whether it is installed by lifting welding or supporting welding, and the success rate of installation is low. At the same time, the device exists due to welding heat during installation Deformation risk, a situation that greatly affects the progress of the project

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