A plug-in sealed shield segment

Abstract

The invention discloses an insertion type sealing shield segment which comprises an arc segment body. The two sides above the segment body are provided with a first installation groove and a second installation groove correspondingly, the first installation groove and the second installation groove are of an L-shaped structure with openings facing outwards, an extension rubber plate is arranged inthe first installation groove, a small rubber plate is arranged in the second installation groove, and the outer side of the extension rubber plate is located outside the segment body. In the construction process, a plurality of segments are spliced into a tube ring, and the adjacent segments are matched, spliced and connected through the extension rubber plate and the small rubber plate. An expansion water stop strip is arranged below the extension section of the extension rubber plate. The insertion type sealing shield segment is convenient to install, high in support ability, good in effect, high in safety, good in sealing performance and high in water pressure resistance, and solves the problems that a joint between the adjacent segments is poor in sealing performance and bears smallwater pressure.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a plug-in sealed shield segment. Background technique [0002] At present, mud-water balance shield / earth pressure balance shield has been widely used in underground tunnel construction, especially mud-water balance shield, which has been reused in water-rich and high-pressure urban subway tunnels, river-crossing and sea-crossing tunnels and other projects. [0003] The assembled segments are used as the shield tunnel support structure to support the surrounding earth pressure and water pressure, and to seal and waterproof. Therefore, the quality of segment assembly and the waterproof ability of joints are directly related to the quality of the tunnel, and even whether the tunnel can be used normally. The traditional reinforced concrete segment adopts the type of sealing strip pasted at the joint of the segment. The longitudinal joint of the segment relies on the ext...

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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to address the deficiencies of the prior art, to provide a plug-in sealing shield segment that is easy to install, strong in support, good in effect, high in safety and good in sealing, and solves the problem of The joints between adjacent segments are not well sealed, and the water pressure is low, etc.

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