Repair structure and repair method for underwater foundation structure scour pit

Abstract

The invention discloses a repair structure for an underwater foundation structure scour pit. The repair structure comprises a scour pit foundation solidification structure, a scour pit backfilling solidification structure and an anti-scour protection solidification structure. The scour pit foundation solidification structure is composed of a plurality of solidified soil piles driven into the bottom face of the scour pit and the seabed on the periphery of the scour pit. The scour pit foundation curing structure is connected with a underwater foundation structure through a curing agent; the scour pit backfill solidification structure is solidified soil filled in the scour pit, and the top elevation of the scour pit backfill solidification structure is the seabed surface elevation; and the anti-scour protection solidification structure is solidified soil which is filled on the top face of the scour pit backfilling solidification structure in a blowing mode, the top face of the anti-scour protection solidification structure is 80 cm higher than the top face of the scour pit, and the distance between the outer edge of the bottom face of the anti-scour protection solidification structure and the edge of the scour pit is 0.5 time of the diameter of the scour pit. The invention further discloses a repair method for the underwater foundation structure scour pit. The formed scour pit can be effectively repaired, and the scour pit can be prevented from being formed again.

Description

technical field [0001] The invention relates to a repair structure and repair method for scour pits of underwater foundation structures. Background technique [0002] In recent years, with the continuous expansion of the development and utilization of marine energy resources, more and more offshore structures have appeared on the sea. Piles and piers are common types of underwater foundation structures in water structures such as piers, bridges and ocean platforms. When these underwater foundation structures stand in the ocean, the flow field of the water flow near the underwater foundation structures will change greatly , a horseshoe vortex will be generated in front, and the flow velocity will increase. When the wave encounters the underwater infrastructure, it will also produce diffraction, reflection, and wave breaking. These phenomena eventually lead to an increase in the shear stress and sediment transport rate values ​​of the seabed surface at the bottom of the under...

AI Technical Summary

Problems solved by technology

These phenomena eventually lead to increased shear stress and sediment transport rate values ​​on the seabed surface at the bottom of the underwater foundation structure, and lead to local scour

In the complex marine environment, the resulting scour pits reduce the contact depth between the underwater foundation structure and the surrounding seabed, reducing the bearing capacity and stability of the underwater foundation structure

[0003] Existing scour pits are often buried by throwing stones, sand bags, and covering sand quilts. These methods can only increase the protective surface layer, and cannot improve the anti-scour properties of the original foundation soil. New scours often occur at the interface between the protective layer and the original foundation soil. Over time, the protective layer is damaged under the long-term action of waves and currents, and the foundation is at risk of being scoured again.

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