Fireproof structure applied to pipe section joint of immersed tunnel and provided with linear moving mechanism

Abstract

The invention discloses a fireproof structure applied to a pipe section joint of an immersed tunnel and provided with a linear moving mechanism. The fireproof structure comprises waterproof belt assemblies and fireproof assemblies, wherein each waterproof belt assembly and each fireproof assembly are connected between a first pipeline and a second pipeline which are adjacent; each fireproof assembly comprises a protecting plate assembly, a movable connection assembly, a heat insulation piece and a flexible fire belt, the protecting plate assembly comprises a first fireproof plate assembly, a second fireproof plate assembly and the heat insulation piece fixedly connected between the first fireproof plate assembly and the second fireproof plate assembly, the first fireproof plate assembly and the second fireproof plate assembly are arranged at an interval and movably connected with the second pipeline through the movable connection assembly, the heat insulation piece is located between afirst fireproof plate and a second fireproof plate, the flexible fire belt is located between the first fireproof plate and the second fireproof plate, one end of the flexible fire belt is connectedwith the heat insulation piece, and the other end is connected with one pipeline. According to the technical scheme, the fireproof assemblies can meet the requirements of fireproof timeliness and displacement simultaneously.

Description

technical field [0001] The invention relates to the technical field of immersed tube tunnels, in particular to a fireproof structure for joint joints of immersed tube tunnels with a linear movement mechanism. Background technique [0002] In the immersed tube construction tunnel, the connection between two adjacent pipelines needs to be connected with waterproof components, such as rubber waterstop strips, to prevent external moisture from penetrating into the pipeline through the connection. In addition to the need for waterproof components In addition to meeting the longitudinal expansion and contraction displacement between the tunnel pipe sections, the fire protection requirements must be met within the design period (for example, 120 years), so as to ensure the overall fire protection performance of the tunnel structure. If a fire breaks out in the pipeline, the fire situation will definitely affect the service life of the waterproof component. Therefore, the current co...

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Problems solved by technology

If a fire breaks out in the pipeline, the fire situation will definitely affect the service life of the waterproof component. Therefore, the current common practice is to install a protective plate to meet the fireproof requirements of the waterproof component. However, the existing fireproof panels have the following problems: only set Fireproof panels, after testing, the existing fireproof design meets the two-hour fireproof requirements, that is, the fire in the pipeline will not affect the waterproof components within two hours, and the two-hour fireproof time limit can no longer meet the effective fireproof requirements

At the same time, the two adjacent pipes require longitudinal displacement, and the existing joint structure only has one fireproof board, which cannot meet the displacement requirements

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