Immersed tube tunnel tube segment gravity anchor

Abstract

The invention discloses an immersed tube tunnel tube segment gravity anchor, and belongs to the technical field of immersed tube tunnel tube construction. The immersed tube tunnel tube segment gravityanchor comprises an anchor block. The top of the anchor block is connected with two groups of symmetrically-arranged lifting rings, the anchor block is of a hollow structure, the interior of the anchor block is connected with a movable box, a piston is slidingly connected to the inner side wall of the movable box, an air airbag is connected into the movable box, an air inlet of the air airbag isconnected with an air compressor, the bottom of the anchor block is connected with a supporting plate, the bottom of the piston penetrates through the movable box and the bottom of the anchor block tostretch outwards, and an elastic reset part is connected between a pressing plate and the supporting plate. The contact area of the piston and the sea bed can be increased, the counter acting force of the piston is improved, the piston is prevented from being inserted into mud, and it is not needed to inject water into the anchor block through an embedded steel pipe to drive the piston to be reset.

Description

technical field [0001] The invention relates to the technical field of pipe construction for immersed pipe tunnels, in particular to a gravity anchor for pipe sections of immersed pipe tunnels. Background technique [0002] After the floating transportation of the immersed pipe is completed, the pipe section is sunk and installed. To be able to locate accurately, it is necessary to rely on a reliable positioning mooring system to resist the force of the water flow. Since the installation and positioning of the pipe section mainly bears the horizontal flow force, while the longitudinal flow force is relatively small, a four-point mooring system is used for positioning. The throwing of the anchor block mainly considers the resistance to the force of lateral water flow; usually, in the construction process of the immersed tube tunnel, a solid anchor block is used as the temporary anchor block structure of the immersed tube. The tensile capacity of this structure can meet the co...

AI Technical Summary

Problems solved by technology

[0004] Although this patent can use the piston to move down to lift the anchor block through the reverse force, which is convenient for the lifting mechanism to lift the anchor block, but there are still defects. The piston contacts with the bottom of the sea through the T-shaped structure. The area is small, and it is easy to insert into the seabed soil, so the force of the reverse action on the anchor block is small, and the benefit for the lifting of the anchor block is not great

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