A flexible joint at the connection between a shield tunnel and a shaft
A technology of shield tunneling and flexible joints, which is applied in tunnels, shaft equipment, tunnel linings, etc., to achieve the effect of simple structure, easy on-site construction and guarantee of sealing.
Active Publication Date: 2018-12-25
BC P INC CHINA NAT PETROLEUM CORP +2
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- Application Information
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to be able to absorb the axial deformation and lateral deformation of the connection between the shield tunnel and the vertical shaft during an earthquake, while ensuring the tightness of the connection
Method used
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Embodiment 1
[0023] This embodiment is a flexible joint at the connection between the small-diameter shield tunnel and the vertical shaft. The diameter (inner diameter) of the shield tunnel is Ф4250mm, such as figure 1 As shown, the flexible joint includes a hoop buffer layer 10, an axial buffer layer 9 and a watertight sealing structure, the axial buffer layer is a waterproof rubber buffer layer, and the hoop buffer layer is a polyurethane buffer layer. The circumferential buffer layer 10 is arranged in the gap between the segment and the shaft wall; the axial buffer layer 9 and the sealing and water-tight structure are both arranged in the gap between the segment and the shield tunnel door sealing structure, wherein, The axial buffer layer 9 is arranged outside the gap between the segment and the hole door sealing structure, and the sealing and water-tight structure is arranged inside the gap between the segment and the hole door sealing structure.
[0024] The sealing water-stop structu...
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The invention relates to a flexible joint in the connection position of a shield tunnel and a vertical shaft and belongs to the technical field of earthquake proofing of shield tunnels. The flexible joint in the connection position of the shield tunnel and the vertical shaft comprises an annular buffer layer, an axial buffer layer and a sealing and water stop structure, wherein the annular buffer layer is arranged in a gap between a pipe piece and the wall of the vertical shaft; the axial buffer layer and the sealing and water stop structure are both arranged in a gap between the pipe piece and a shield tunnel portal sealing structure. According to the flexible joint in the connection position of the shield tunnel and the vertical shaft, when axial deformation and annular deformation within a design limiting value happen during an earthquake, the flexible joint can guarantee that the shield pipe piece connected with the vertical shaft doesn't collide with the vertical shaft and no damage is caused, and besides, the sealing property during deformation can be guaranteed through sealing and water stop. The flexible joint is simple in structure, can be machined in a factory, can be field-assembled and facilitates field construction.
Description
technical field [0001] The invention relates to a flexible joint at the joint between a shield tunnel and a shaft, and belongs to the field of shield tunnel anti-seismic technology. Background technique [0002] Because the unit volume mass of the shield tunnel itself is much smaller than that of the surrounding soil, the inertial force of the earthquake acting on the tunnel section is smaller than the inertial force acting on the surrounding soil. When an earthquake occurs, the tunnel vibrates with the surrounding soil, and the deformation must be coordinated with the relative displacement and deformation of the surrounding soil. The shield tunnel is an underground linear structure with a flexible structure as a whole. As an underground rigid structure, the shaft deforms with the surrounding soil during an earthquake. At the connection between the shield tunnel and the shaft, the stiffness changes suddenly, and the deformation is difficult to coordinate. According to the...
Claims
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IPC IPC(8): E21D11/38E21D9/00E21D8/00E21D11/08
CPCE21D8/00E21D9/00E21D11/08E21D11/385
Inventor 马晓成王丽左雷彬杨威李国辉曾志华黄丽郭君冯亮
Owner BC P INC CHINA NAT PETROLEUM CORP