Mixed type suction bucket jacket fan foundation

Abstract

The utility model discloses a mixed type suction bucket jacket fan foundation which comprises a jacket structure and a suction bucket assembly, the suction bucket assembly is coaxially welded to the lower portion of a stand column of the jacket structure, a ballast block is poured in a cylindrical pit formed by the top of the suction bucket assembly and the upper end of a bucket body, and an anti-scouring gravity ring is poured outside the bucket body. According to the utility model, aiming at the geology with shallow water depth and high surface soil bearing capacity, the mud entering depth of the suction bucket assembly structure is reduced, and meanwhile, the counterweight structure is additionally arranged on the part above the mud surface of the bucket body; an anti-scour gravity ring with a slope formed by pouring reinforced concrete is arranged outside the barrel body, a ballast block is poured in a cylindrical recess between the cover plate and the upper end of the barrel body, and the anti-scour gravity ring and the ballast block are all made of high-density concrete, so that the anti-pulling capacity of the suction barrel assembly is improved, the bearing capacity of a foundation is achieved, and the in-place stability is improved. The anti-scouring gravity ring can effectively reduce scouring and improve the long-term use stability of the foundation.

Description

Technical Field

[0001] The utility model relates to the technical field of marine engineering construction, in particular to a hybrid suction bucket pipe frame fan foundation. Background Art

[0002] In order to obtain more resources, offshore wind power has been developed on a large scale. The development of the offshore wind power industry has driven the construction of a series of wind farms in various sea areas. At present, most offshore wind turbines use steel pipe pile foundations. This type of foundation is fast to construct, has a lot of mature professional equipment, has high overall construction efficiency, and is economical and practical. The barrel foundation relies on the end resistance and side wall friction generated by its structure embedded in the soil to a certain depth to withstand the environmental forces of the offshore structure. No piling equipment is required. Only a set of small sinking equipment is needed to form negative pressure and penetrate the suction bucket to the designed depth. It is especially suitable for areas with deep water. However, piling cannot be achieved under conditions of shallow water depth and high bearing capacity of the surface soil. The installation of single piles by rock-embedded openings takes a long time and the construction cost is extremely high. If a barrel foundation is used, the depth of entry into the mud is limited, resulting in insufficient foundation pull-out resistance in the in-situ state. If a gravity foundation is used, a large-sized concrete structure is required, which is not easy to transport and install, and is not suitable for offshore wind power needs.

[0003] In order to solve the above problems, we proposed a hybrid suction bucket duct frame fan foundation. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the utility model provides a hybrid suction bucket pipe rack fan foundation, and the utility model provides the following technical solutions:

[0005] A hybrid suction bucket catheter frame fan foundation, comprising a catheter frame structure and a suction bucket assembly, wherein the catheter frame structure is a truss structure of a pipe assembly; the suction bucket assembly is coaxially welded to the lower part of the column of the catheter frame structure, the catheter frame structure supports the upper fan load and transmits it to the suction bucket assembly, the catheter frame assembly adopts a pipe assembly, has a small flow resistance area in water, a large structural span, and effectively improves the in-situ stability;

[0006] The suction barrel assembly is a strong structure barrel body formed by rolling steel plates and having a sealed upper part and an open lower part. The suction barrel assembly is inserted into the seabed to provide basic bearing. The suction barrel assembly consists of a barrel body, a top cover, a support shaft plate, an anode assembly, and a support column. The barrel body supports the soil through the ends, and the friction between the inner and outer side walls and the soil forms bearing. According to the structural design, ribs can also be arranged in the longitudinal direction inside the barrel body to improve the ability to withstand internal pressure and achieve negative pressure penetration without buckling of the structure. The top cover is concentrically welded inside the barrel body to form a columnar member with an open bottom and a certain depth at the top. A ballast block is cast in the columnar depression formed by the top cover and the upper end of the barrel body. The support column is welded at the center of the upper end of the top cover. The support shaft plate along the diameter direction is welded between the support column and the top cover, and the anode assembly is welded on the top of the support shaft plate. An anti-scouring gravity ring is cast on the outside of the barrel body.

[0007] Preferably, a top flange for fan installation is provided on the upper portion of the duct frame structure, and the duct frame structure can be optionally provided with a three-column or four-column structure, and the bottom of the column is welded to the suction bucket assembly to form a three-legged or four-legged duct frame structure.

[0008] Preferably, the anti-scour gravity ring is a conical ring cast by high-density concrete and has an upper slope, and the bottom plane of the anti-scour gravity ring is flush with the top cover.

[0009] Preferably, the ballast block is a high-density load block made of steel sand concrete.

[0010] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0011] This patent uses three or four sets of suction buckets to support the upper fan load by welding the suction bucket assembly at the lower end of the conductor frame structure. For geology with shallow water depth and high bearing capacity of the surface soil, the depth of the suction bucket assembly structure into the mud is reduced, and a counterweight structure is added to the part above the mud surface of the barrel body. The outside of the barrel body is a sloped anti-scour gravity ring formed by pouring reinforced concrete, and ballast blocks are poured in the cylindrical depression between the cover plate and the upper end of the barrel body. They are all high-density concrete. In this way, the pull-out resistance of the suction bucket assembly is increased, the bearing capacity of the foundation is achieved, and the in-situ stability is improved. The anti-scour gravity ring can effectively reduce scour and improve the long-term stability of the foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used to illustrate the purpose of the preferred embodiment and are not considered to be limitations of the present invention. In the entire drawings, the same reference numerals are used to represent the same parts.

[0013] In the attached picture:

[0014] Figure 1 It is an axonometric schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a top view schematic diagram of the overall structure of the utility model;

[0016] Figure 3 It is an axonometric diagram of the basic structure of the utility model;

[0017] Figure 4 It is a schematic diagram of a suction bucket assembly of the utility model.

[0018] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the components is as follows:

[0019] 1. Pipe frame structure; 2. Suction barrel assembly; 21. Barrel body; 22. Top cover; 23. Support shaft plate; 24. Anode assembly; 25. Support column; 3. Anti-scour gravity ring; 4. Ballast block. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] Combine the following Figures 1 to 4 A hybrid suction bucket conduit frame fan foundation of an embodiment of the utility model is specifically described.

[0023] like Figures 1 to 4As shown, a hybrid suction bucket duct frame fan foundation has a duct frame structure 1 which is a truss structure composed of pipe fittings. The duct frame structure 1 is a three-column structure. The bottom of the column is welded and connected to the suction bucket assembly 2 to form a three-leg duct frame structure. The upper part of the duct frame structure 1 is provided with a top flange that meets the requirements of fan installation. A suction barrel assembly 2 is coaxially welded to the lower part of the column of the catheter frame structure 1. The suction barrel assembly 2 is a strong structure barrel body formed by rolling steel plates and having a sealed upper part and an open lower part. The suction barrel assembly 2 consists of a barrel body 21, a top cover 22, a support shaft plate 23, an anode assembly 24, and a support column 25. The top cover 22 is concentrically welded inside the barrel body 21. A ballast block 4 is cast in a cylindrical recess formed by the top cover 22 and the upper end of the barrel body 21. The ballast block 4 is a high-density load block made of steel sand concrete. A support column 25 is welded at the center of the upper end of the top cover 22. A support shaft plate 23 is welded between the support column 25 and the top cover 22 in the diameter direction, and an anode assembly 24 is welded on the top of the support shaft plate 23; an anti-scouring gravity ring 3 is cast on the outside of the barrel body 21. The anti-scouring gravity ring 3 is a conical ring cast by high-density concrete and has an upper slope. The bottom plane of the anti-scouring gravity ring 3 is flush with the top cover 22.

[0024] The specific installation steps of this patent are:

[0025] Step 1: Design the foundation according to the soil quality determined by the geological survey and the upper wind turbine load requirements, determine the size of the conductor frame structure 1 and the mud load requirements of the suction bucket assembly 2, determine the pull-out resistance of the suction bucket through detailed design and analysis, manufacture the structure according to the requirements of the drawings, and manufacture the steel structure of the conductor frame structure 1 and the suction bucket assembly 2 by rolling, cutting, welding, etc., complete the production of the ballast block 4 on the top cover 22 by pouring, and at the same time make the mold on site, weld the steel bars to the barrel body 21, etc. to complete the skeleton of the anti-scour gravity ring 3, and pour concrete to complete the production of the anti-scour gravity ring 3.

[0026] Step 2: Transport the separately manufactured duct frame structure 1 and suction bucket assembly 2 to the site separately, use a crane or module transport vehicle to adjust the position of the suction bucket assembly 2 so that its orientation corresponds to the duct frame structure 1, and at the same time, align the support column 25 with the column of the duct frame structure 1, lower the end of the column to fit it, weld it into one, and complete the structural manufacturing of the wind turbine foundation. Install the base, pipelines, hanging points, etc. required by the construction equipment according to construction needs, conduct inspection and repaint, and after completion, meet the conditions for shipment, wait for the transport ship to arrive at the construction site, hoist or roll-on / roll-off the wind turbine foundation to the transport ship and fix it. According to actual conditions, the transport ship can transport one or more sets of wind turbine foundations at a time.

[0027] Step 3: After transporting to the site, install the suction barrel construction equipment, lift the wind turbine foundation and lower it, control the lowering speed as required until the barrel body 21 is inserted into the seabed to a certain depth to support the upper load, and achieve self-weight entry into the mud and stability, operate the special construction equipment to sink the suction barrel under negative pressure, and keep the horizontality of the top flange assembly of the jacket structure 1 within the limit. In case of local unevenness, sink the separate suction barrel assembly 2 separately until the suction barrel assembly 2 is sunk to the top cover 22 and close to the mud surface, and then complete the installation. Then recover the special construction equipment, unhook the crane, and the construction is completed.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Claims

1. A hybrid suction bucket pipe frame fan foundation, comprising a pipe frame structure (1), a suction bucket assembly (2), It is characterized in that The catheter frame structure (1) is a truss structure composed of pipe fittings; the suction barrel assembly (2) is coaxially welded to the lower part of the column of the catheter frame structure (1); the suction barrel assembly (2) is a strong structure barrel body formed by rolling steel plates and having a sealed upper part and an open lower part; the suction barrel assembly (2) is composed of a barrel body (21), a top cover (22), a support shaft plate (23), an anode assembly (24), and a support column (25); the barrel body (21) is coaxially welded to the inside with the top cover (23); A ballast block (4) is cast in a columnar depression formed by the top cover (22) and the upper end of the barrel body (21); the support column (25) is welded at the center of the upper end of the top cover (22); a support shaft plate (23) is welded between the support column (25) and the top cover (22) along the diameter direction; and the anode assembly (24) is welded to the top of the support shaft plate (23); and an anti-scouring gravity ring (3) is cast on the outside of the barrel body (21).

2. A hybrid suction bucket pipe frame fan foundation according to claim 1, It is characterized in that The upper part of the conduit frame structure (1) is provided with a top flange that meets the requirements of fan installation. The conduit frame structure (1) can be optionally provided with a three-column or four-column structure, and the bottom of the column is welded to the suction bucket assembly (2) to form a three-leg or four-leg conduit frame structure.

3. A hybrid suction bucket pipe frame fan foundation according to claim 1, It is characterized in that The anti-scour gravity ring (3) is a conical ring cast by high-density concrete and has an upper slope, and the bottom plane of the anti-scour gravity ring (3) is flush with the top cover (22).

4. A hybrid suction bucket pipe frame fan foundation according to claim 1, It is characterized in that The ballast block (4) is a high-density load block made of steel sand concrete.

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