Bionic fin type maritime work structure foundation diversion anti-scouring protective belt

Abstract

A bionic fin type maritime work structure foundation diversion anti-scouring protective belt is composed of an integral framework, a broken stone filling area and a framework outer covering layer. The whole framework is divided into a main framework and a subordinate framework; a broken stone filling area is arranged between the main framework and the auxiliary framework; the skeleton outer skin layer covers the gravel filling area and is fixed to the upper portion of the overall skeleton. The cutting effect of the bionic fins on ocean currents is used for reference, the soil body impact cutting influence caused by interaction between the exposed part of the marine structure suction force foundation and the ocean currents is reduced, and it is guaranteed that the marine structure foundation meets the bearing capacity requirement in the service period.

Description

Technical Field

[0001] The present invention belongs to the field of marine engineering and relates to the basic design and application of offshore structural engineering. Background Art

[0002] In addition to bearing the gravity of the superstructure, the foundation of the offshore structure is also subjected to horizontal loads and moment loads from sea breezes, waves, ocean currents, etc. In a complex marine environment, the scouring effect of wave cyclic loads on the foundation of offshore structures cannot be ignored. The rapid flow of water carries the mud near the bottom of the foundation. Under the action of frequent vortex shedding, the upper mud surface around the bottom of the foundation is quickly hollowed out, and eventually a part of the foundation is exposed to the mud surface. In addition, the soil around the foundation is washed away to form scour pits of varying degrees, resulting in a reduction in the bearing capacity of the foundation. The seabed scouring phenomenon seriously affects the stability of the foundation, and at the same time causes changes in the stiffness of the seabed, resulting in a slow change in the platform's natural period, aggravating structural fatigue damage, and having an adverse impact on the long-term safe production of offshore platforms. Summary of the invention

[0003] In order to reduce the scouring effect of seabed surface currents on the soil around the marine structure foundation, the present invention proposes a bionic fish fin type marine structure foundation diversion anti-scouring protection belt, which is installed on both sides of the marine structure foundation along the direction of the ocean current and is symmetrically distributed. It has an inhibitory effect on the scouring effect of the ocean current on the soil around the foundation, thereby ensuring that the foundation bearing capacity always meets the design requirements during the service life.

[0004] The present invention adopts the following technical solutions:

[0005] A bionic fin-type marine structure foundation diversion anti-scour protection belt includes: an overall frame, a gravel filling area and a frame outer coating. The overall frame is divided into a main frame and a subordinate frame; the gravel filling area is between the main frame and the subordinate frame; the frame outer coating covers the gravel filling area and is fixed on the upper part of the overall frame.

[0006] In the present invention, the integral skeletons are all made of perforated steel plates or perforated reinforced concrete materials, and the cross-sectional heights of the main skeleton and the subordinate skeleton gradually increase from the far end to the near end of the foundation.

[0007] In the present invention, the length of the protection belt along the radial direction of the foundation is three times the diameter of the foundation.

[0008] In the present invention, the gravel filling area is filled with non-polluting waste concrete from building demolition to increase the deadweight of the anti-scour protection belt. The gravel filling area covers a radial area of ​​1 / 2 times the length of the protection belt along the outer side of the foundation.

[0009] In the present invention, the main frame and the subordinate frame are both right triangles in side view, wherein the height of the vertical right angle side of the former is 1 times the basic diameter, and the height of the vertical right angle side of the latter is 0.5 times the basic diameter.

[0010] In the present invention, the outer layer of the skeleton is a multi-section spliced ​​structure, and each section of the spliced ​​structure is a roof tile-type stacked structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described in conjunction with the accompanying drawings.

[0012] Figure 1 This is a front view of the anti-scour protection belt

[0013] Figure 2 A top view of the anti-scour protection belt 1-marine structure foundation; 2-main frame column; 3-subordinate frame; 4-frame outer layer; 5-grouting port; 6-gravel filling area; DETAILED DESCRIPTION

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] A bionic fish-fin type marine structure foundation diversion anti-scour protection belt, including: an overall frame, a gravel filling area and a frame outer coating. After the construction of the marine structure is completed, the overall frame is lifted by a barge and sunk to a designated position, and then gravel / concrete and other materials are placed in the gravel filling area. When the gravel height reaches the designated height (1 / 2 subordinate frame height), the placement is stopped. Subsequently, the skeleton outer coating is hoisted to the upper end of the overall frame and connected to the overall frame by bolts to achieve the installation of the skeleton outer coating. Then, through the reserved opening of the skeleton outer coating, fine aggregates such as fine gravel and fine waste concrete are injected into the entire protection belt. After the cavity is filled, the reserved opening is closed and the construction is completed.

[0016] The above embodiments further illustrate the purpose, technical solutions and advantages of the present invention in detail. The above is only one embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bionic fish fin type marine structure foundation diversion anti-scour protection belt, characterized by: The overall frame is divided into three parts: a gravel filling area and a frame outer layer; the overall frame is divided into two parts: a main frame and a subordinate frame; the gravel filling area is between the main frame and the subordinate frame; the frame outer layer covers the gravel filling area and is fixed on the upper part of the overall frame.

2. According to the bionic fish-fin type marine structure foundation diversion and anti-scour protection belt described in claim 1, the overall skeleton is a perforated steel plate or a perforated reinforced concrete material, and the cross-sectional height of the main skeleton and the subordinate skeleton gradually increases from the far foundation end to the near foundation end.

3. According to the bionic fish-fin type marine structure foundation diversion anti-scour protection belt of claim 1, the gravel filling area is filled with pollution-free building demolition waste concrete to increase the deadweight of the anti-scour protection belt.

4. According to the bionic fish-fin type marine structure foundation diversion and anti-scour protection belt described in claim 1, the outer layer of the skeleton is a multi-section splicing structure with reserved grouting openings, and each section of the splicing structure is a roof tile-type stacked structure.

5. According to claim 2, the cross-sectional heights of the main skeleton and the slave skeleton are such that the cross-sectional height of the main skeleton is higher than that of the slave skeleton at the same radius from the center of the base.

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