Suction caisson foundation

Abstract

The present application relates to the field of floating offshore wind turbine anchoring technology, and particularly relates to a suction caisson foundation, the suction caisson foundation comprising a pipe body, a guide pipe and a support component, one end of the guide pipe being connected with the pipe body, the guide pipe extending along the height direction of the pipe body, the support component comprising a first pipe and a second pipe, one end of the first pipe being sleeved on the guide pipe, and the first pipe being movable on the guide pipe along the height direction of the pipe body, the other end of the first pipe being pivotally connected with one end of the second pipe, the other end of the second pipe being pivotally connected with one end of the pipe body inserted into the soil body. The suction caisson foundation can improve the vertical and horizontal bearing capacity and facilitate the installation of the suction caisson foundation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of floating offshore wind turbine anchoring technology, and particularly relates to a suction caisson foundation. BACKGROUND

[0002] The suction caisson foundation is a common foundation form for offshore wind power foundations and offshore platforms. Since the shallow soil is mainly silt and silty sand, the soil quality is relatively poor, and the bearing characteristics of the suction caisson foundation are greatly affected by the shallow soil. Meanwhile, under the influence of wind, wave, current and other factors, as well as the long-term uplift load, the suction caisson foundation produces large horizontal and vertical bearing capacity and displacement, which threatens the safety of the upper structure. In related technologies, the diameter of the convex edge is limited, so the vertical and horizontal bearing capacity of the suction caisson foundation is limited, and the installation between the convex edge and the soil has resistance when the negative pressure is installed. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the embodiments of the present application propose a suction caisson foundation, which can improve the vertical and horizontal bearing capacity and facilitate the installation of the suction caisson foundation.

[0004] The suction caisson foundation of the embodiments of the present application comprises: a pipe body; a guide pipe, one end of the guide pipe is connected with the pipe body, and the guide pipe extends along the height direction of the pipe body; a support component, the support component comprises a first pipe and a second pipe, one end of the first pipe is sleeved on the guide pipe, and the first pipe is movable on the guide pipe along the height direction of the pipe body, the other end of the first pipe is pivotally connected with one end of the second pipe, and the other end of the second pipe is pivotally connected with one end of the pipe body inserted into the soil.

[0005] The suction caisson foundation of the embodiments of the present application can improve the vertical and horizontal bearing capacity and facilitate the installation of the suction caisson foundation.

[0006] In some embodiments, the support component has a first position and a second position, in the first position, the first pipe and the second pipe are arranged parallel to the pipe body, in the second position, the pivot connection of the first pipe and the second pipe is away from the pipe body, and the first pipe and the second pipe have an included angle therebetween.

[0007] In some embodiments, the suction caisson foundation further comprises a driving component, the driving component is connected with one end of the pipe body away from the second pipe, and the driving component is used to drive the one end of the first pipe connected with the guide pipe to move in the height direction of the pipe body.

[0008] In some embodiments, the suction caisson foundation further comprises a limiting component located in the guide pipe, the limiting component comprising an elastic member and a limiting block, one end of the elastic member being connected with the limiting block, the other end of the elastic member being connected with the inner wall surface of the guide pipe, the limiting block being movable in the radial direction of the guide pipe to limit the position of the first pipe on the guide pipe.

[0009] In some embodiments, the number of the support components is multiple, and the multiple support components are arranged at intervals in the circumferential direction of the pipe body.

[0010] In some embodiments, the suction caisson foundation further comprises multiple first protrusions, each of the multiple first protrusions being connected with the first pipe and the second pipe, and the multiple first protrusions being arranged at intervals in the height direction of the pipe body, the first protrusion extending away from the pipe body, the extending direction of the first protrusion and the height direction of the first pipe having a preset included angle A, the extending direction of the first protrusion and the height direction of the second pipe having a preset included angle B, and 30°≤A=B≤50°.

[0011] In some embodiments, the suction caisson foundation further comprises multiple second protrusions, one end of each of the multiple second protrusions being connected with the pipe body, and the multiple second protrusions being arranged at intervals in the circumferential direction of the pipe body.

[0012] In some embodiments, the guide pipe is provided with a first grouting hole on the side away from the pipe body.

[0013] The first pipe is provided with a second grouting hole, and the second pipe is provided with a third grouting hole.

[0014] In some embodiments, the suction caisson foundation further comprises a first grouting pipe, the first grouting pipe being adapted to be arranged in the guide pipe, and one end of the first grouting pipe being in communication with the first grouting hole.

[0015] In some embodiments, the suction caisson foundation further comprises a fairlead, the upper end of the pipe body being provided with a cover, one end of the cover being connected with the fairlead, and the cover being provided with an air extraction hole. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of a suction caisson foundation according to an embodiment of the present application.

[0017] Figure 2 is a schematic view of a suction caisson foundation according to an embodiment of the present application. Figure 1 is an enlarged view of region C in FIG. 4.

[0018] Figure 3This is a schematic diagram of the first and second pipes in the first position in the suction-type caisson foundation of this invention according to an embodiment of the invention.

[0019] Figure label:

[0020] Pipe body 1, air extraction hole 11, guide pipe 2, first grouting hole 21, support component 3, first pipe 31, second pipe 32, drive component 4, limiting component 5, elastic element 51, limiting block 52, first protrusion 6, second protrusion 7, first grouting pipe 8, cable guide component 9. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figure 1 As shown, the suction caisson foundation of this embodiment includes a pipe body 1, a guide pipe 2, and a support component 3. One end of the guide pipe 2 is connected to the pipe body 1 and extends along the height direction of the pipe body 1. The support component 3 includes a first pipe 31 and a second pipe 32. One end of the first pipe 31 is sleeved on the guide pipe 2 and the first pipe 31 is movable along the height direction of the pipe body 1 on the guide pipe 2. The other end of the first pipe 31 is pivotally connected to one end of the second pipe 32, and the other end of the second pipe 32 is pivotally connected to the end of the pipe body 1 that is inserted into the soil.

[0023] Specifically, such as Figure 1 As shown, the pipe body 1 extends in the vertical direction, and the guide pipe 2 extends in the vertical direction. One end of the guide pipe 2 is connected to the pipe body 1. For example, one end of the guide pipe 2 is detachably connected to the pipe body 1. For example, one end of the guide pipe 2 is connected to the pipe body 1 by bolts. Alternatively, the guide pipe 2 and the pipe body 1 are integrally formed to improve the structural strength of the suction caisson foundation.

[0024] The supporting component 3 includes a first pipe 31 and a second pipe 32, which extend vertically. The upper end of the first pipe 31 is fitted onto the guide pipe 2. For example, the upper end of the first pipe 31 is fitted onto the guide pipe 2 via a collar, and one end of the collar has an opening, i.e., the collar is arc-shaped. The collar has an opening to allow the upper end of the first pipe 31 to slide relative to the guide pipe 2, avoiding the collar being circular and thus preventing the connection between the guide pipe 2 and the pipe body 1 from obstructing the movement of the collar. The lower end of the first pipe 31 is pivotally connected to the upper end of the second pipe 32, and the lower end of the second pipe 32 is pivotally connected to the lower end of the pipe body 1. Optionally, the lower end of the second pipe 32 can also be pivotally connected to the guide pipe 2. When the pipe body 1 is lowered for installation, i.e., when the pipe body 1 is inserted into the soil from top to bottom, the length directions of the first pipe 31 and the second pipe 32 are parallel to the pipe body 1 to facilitate the insertion of the suction caisson foundation into the soil.

[0025] After the pipe body 1 is installed and lowered, a cylinder or servo electric cylinder can be connected to the upper end of the first pipe 31. Then, the output end of the cylinder or servo electric cylinder extends to apply downward pressure to the upper end of the first pipe 31 from top to bottom. Then, the pivot joint between the lower end of the first pipe 31 and the upper end of the second pipe 32 extends into the soil in a direction away from the pipe body 1.

[0026] In the suction caisson foundation of the embodiment of the present invention, when the pipe body 1 is installed, the first pipe 31 and the second pipe 32 are arranged parallel to the pipe body 1 to facilitate the installation of the suction caisson foundation. After the pipe body 1 is installed, the pivot joint between the lower end of the first pipe 31 and the upper end of the second pipe 32 extends into the soil in a direction away from the pipe body 1. This increases the contact area between the soil and the first pipe 31 and the second pipe 32, thereby improving the vertical and horizontal bearing capacity of the suction caisson foundation.

[0027] In some embodiments, the support member 3 has a first position and a second position. In the first position, the first tube 31 and the second tube 32 are arranged parallel to the tube body 1. In the second position, the pivot joint of the first tube 31 and the second tube 32 is away from the tube body 1, and there is an included angle between the first tube 31 and the second tube 32.

[0028] Specifically, such as Figure 1 As shown, in the first position, i.e., when the pipe body 1 is being lowered and installed, the first pipe 31 and the second pipe 32 are arranged parallel to the pipe body 1 to facilitate its lowering. In the second position, i.e., after the pipe body 1 has been lowered and installed, the pivot joint between the first pipe 31 and the second pipe 32 is moved away from the pipe body 1. Furthermore, the lower end of the first pipe 31 and the upper end of the second pipe 32 extend into the soil along the radial direction of the pipe body 1, and the angle between the first pipe 31 and the second pipe 32 decreases. This further increases the contact area between the soil and the first pipe 31 and the second pipe 32, thereby improving the vertical and horizontal bearing capacity of the suction caisson foundation.

[0029] Optionally, the suction caisson foundation also includes a drive component 4. The drive component 4 is connected to the end of the pipe body 1 away from the second pipe 32, that is, the lower end of the drive component is connected to the upper end of the pipe body 1. The drive component 4 is used to drive the end of the first pipe 31 connected to the guide pipe 2 to move in the height direction of the pipe body 1. That is, the output end of the drive component 4 is connected to the upper end of the first pipe 31 to drive the first pipe 31 to move downward, thereby causing the lower end of the first pipe 31 and the pivot joint of the upper end of the second pipe 32 to extend into the soil, thereby increasing the contact area between the soil and the first pipe 31 and the second pipe 32, thereby increasing the vertical and horizontal bearing capacity of the suction caisson foundation, and thus improving the stability and safety of the suction caisson foundation. Optionally, the drive component 4 can be a servo electric cylinder.

[0030] In some embodiments, the suction caisson foundation further comprises a limiting component 5 located in the guide pipe 2, the limiting component 5 comprises an elastic piece 51 and a limiting block 52, one end of the elastic piece 51 is connected with the limiting block 52, the other end of the elastic piece 51 is connected with the inner wall surface of the guide pipe 2, and the limiting block 52 is movable in the radial direction of the guide pipe 2 to limit the position of the first pipe 31 on the guide pipe 2.

[0031] Specifically, as shown in Figure 1 and Figure 2 , the guide pipe 2 has a cavity inside, one end of the elastic piece 51 is connected with the inner wall surface of the cavity, the other end of the elastic piece 51 is connected with the limiting block 52, for example, the limiting block 52 can be triangular, the guide pipe 2 is provided with a rectangular hole, the upper wall surface of the rectangular hole is pivotally connected with the upper end of the limiting block 52, that is, the first side of the limiting block 52 is located inside the cavity, the second side of the limiting block 52 is located outside the guide pipe 2, and the length direction of the second side of the limiting block 52 has an included angle with the length direction of the guide pipe 2, and the third side of the limiting block 52 is parallel to the left-right direction, thereby when the sleeve ring of the upper end of the first pipe 31 can slide from top to bottom, and when the sleeve ring passes through the limiting block 52, the upper end of the sleeve ring contacts the third side of the limiting block 52, thereby avoiding the sleeve ring from sliding upward, improving the stability and safety of the suction caisson foundation.

[0032] In some embodiments, the number of support components 3 is multiple, and the multiple support components 3 are arranged in the circumferential direction of the pipe body 1.

[0033] Specifically, as shown in Figure 1 and Figure 2 , the number of support components 3 is multiple, and the multiple support components 3 are arranged in the circumferential direction of the pipe body 1, the number of limiting components 5 is multiple, and the multiple limiting components 5 correspond to the multiple support components 3 one by one. The number of guide pipes 2 is multiple, and the multiple guide pipes 2 correspond to the multiple support components 3 one by one, and the number of driving components 4 is multiple, and the multiple driving components 4 correspond to the support components 3 one by one, which improves the contact area between the suction caisson foundation and the soil, thereby improving the horizontal bearing capacity and vertical bearing capacity of the suction caisson foundation, and avoiding the left-right movement and up-down floating of the suction caisson foundation.

[0034] In some embodiments, the suction caisson foundation further comprises multiple first protrusions 6, the multiple first protrusions 6 are respectively connected with the first pipe 31 and the second pipe 32, and the multiple first protrusions 6 are arranged in the height direction of the pipe body 1, the first protrusion 6 extends in the direction away from the pipe body 1, and the extension direction of the first protrusion 6 has a preset included angle A with the height direction of the first pipe 31, the extension direction of the first protrusion 6 has a preset included angle B with the height direction of the second pipe 32, and 30°≤A=B≤50°.

[0035] Specifically, such as Figures 1 to 3 As shown, in the first position, the lower end of the first protrusion 6 is connected to the first pipe 31, and the upper end of the first protrusion 6 can extend into the soil. There is a preset angle A between the length direction of the first protrusion 6 and the height direction of the first pipe 31, that is, there is a preset angle A between the extension direction of the first protrusion 6 and the height direction of the first pipe 31, and 30°≤A≤50°. This avoids breakage at the connection between the lower end of the first protrusion 6 and the first pipe 31 due to the resistance between the first protrusion 6 and the soil during the installation of the first pipe 31 under the pipe body 1. By arranging the first protrusion 6 at an angle, the resistance between the first protrusion 6 on the first pipe 31 and the soil is also reduced, improving the connection stability between the first pipe 31 and the first protrusion 6. Optionally, the first protrusion 6 and the first pipe 31 are integrally formed, improving the stability and safety of the suction caisson foundation. It should be noted that the preset angle A can be 30°, 31°, 41°, and 50°.

[0036] In the second position, the first protrusion 6 on the first pipe 31 can improve the horizontal bearing capacity of the suction caisson. For example, the extension direction of the first protrusion 6 can be parallel to the vertical direction, thereby preventing the first pipe 31 from shifting in the left and right direction and improving the stability and safety of the suction caisson.

[0037] In the first position, the lower end of the first protrusion 6 is connected to the second pipe 32, and the upper end of the first protrusion 6 can extend into the soil. There is a preset angle B between the length direction of the first protrusion 6 and the height direction of the second pipe 32; that is, there is a preset angle B between the extension direction of the first protrusion 6 and the height direction of the second pipe 32, and 30°≤B≤50°. This prevents the lower end of the first protrusion 6 from breaking at the connection point with the second pipe 32 due to the resistance between the first protrusion 6 and the soil during the installation of the second pipe 32 under the pipe body 1. By arranging the first protrusion 6 at an angle, the resistance between the first protrusion 6 on the second pipe 32 and the soil is also reduced, improving the connection stability between the second pipe 32 and the first protrusion 6. Optionally, the first protrusion 6 and the second pipe 32 are integrally formed, improving the stability and safety of the suction caisson foundation. It should be noted that the preset angle B can be 30°, 31°, 41°, or 50°.

[0038] In the second position, the first protrusion 6 on the second pipe 32 can improve the vertical bearing capacity of the suction caisson. For example, the extension direction of the first protrusion 6 can be parallel to the left and right direction, thereby preventing the second pipe 32 from floating in the up and down direction and improving the stability and safety of the suction caisson foundation.

[0039] Optionally, the suction caisson foundation also includes a second protrusion 7, and there are multiple second protrusions 7. The lower end of the second protrusion 7 is connected to the pipe body 1, and the multiple second protrusions 7 are arranged at intervals along the circumference of the pipe body 1 to improve the stability and safety of the suction caisson foundation.

[0040] In some embodiments, the guide tube 2 is provided with a first grouting hole 21 on the side away from the tube body 1, the first tube 31 is provided with a second grouting hole, and the second tube 32 is provided with a third grouting hole.

[0041] Specifically, such as Figures 1 to 3 As shown, a first grouting hole 21 is provided on the side of the guide pipe 2 away from the pipe body 1. The upper end of the guide pipe 2 is adapted to be connected to the grouting device during construction. The grouting device injects grout into the guide pipe 2 and then sprays it out from the first grouting hole 21, thereby forming a solidified body of grout and soil around the pipe body 1, thereby improving the stability and safety of the suction caisson.

[0042] The guide pipe 2 is also connected to the first pipe 31 and the second pipe 32. For example, in the second position, the lower end of the guide pipe 2 is connected to the lower end of the second pipe 32. The grout in the guide pipe 2 enters the second pipe 32. The third grouting hole on the second pipe 32 is suitable for spraying the grout out of the grout and the soil solidification, thereby improving the stability and safety of the suction caisson.

[0043] The upper end of the guide pipe 2 is connected to the upper end of the first pipe 31, and the grout in the guide pipe 2 enters the first pipe 31, or the second pipe 32 is connected to the first pipe 31. The second grouting hole on the first pipe 31 is suitable for spraying out the grout to form a solidified grout and soil, thereby improving the stability and safety of the suction caisson.

[0044] Optionally, the suction caisson foundation also includes a first grouting pipe 8, which is adapted to be arranged inside the guide pipe 2, and one end of the first grouting pipe 8 is connected to the first grouting hole 21 to improve the stability of grouting.

[0045] Optionally, the suction caisson foundation also includes a second grouting pipe, which is adapted to be arranged inside the first pipe 31, and one end of the second grouting pipe is connected to the first grouting pipe 8 to improve the stability of grouting.

[0046] Optionally, the suction caisson foundation also includes a third grouting pipe, which is adapted to be arranged inside the second pipe 32, and one end of the third grouting pipe is connected to the second grouting pipe to improve the stability of grouting.

[0047] In some embodiments, the suction caisson foundation further includes a cable guide 9, the upper end of the pipe body 1 has a cap, one end of the cap is connected to the cable guide 9, and the cap is provided with an air extraction hole 11.

[0048] Specifically, such as Figures 1 to 3As shown, the guide cable 9 is connected to the floating object used in the construction of the suction caisson to facilitate the construction. The cover is provided with a suction hole 11 to suck the air in the pipe body 1 and the soil during the sinking installation, thereby forming a negative pressure between the pipe body 1 and the soil, improving the stability and safety of the suction caisson.

[0049] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0051] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0053] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0054] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A suction caisson foundation, characterized in that, The utility model relates to a kind of pipe support, including: Pipe body; Guide pipe, one end of the guide pipe is connected with the pipe body, and the guide pipe extends along the height direction of the pipe body; Supporting component, the supporting component includes first pipe and second pipe, one end of the first pipe is sleeved on the guide pipe, and the first pipe is movable on the guide pipe along the height direction of the pipe body, the other end of the first pipe is pivotally connected with one end of the second pipe, and the other end of the second pipe is pivotally connected with one end of the pipe body inserted into the soil; Further comprising limiting component, the limiting component is located in the guide pipe, the limiting component includes elastic member and limiting block, one end of the elastic member is connected with the limiting block, the other end of the elastic member is connected with the inner wall surface of the guide pipe, and the limiting block is movable in the radial direction of the guide pipe to limit the position of the first pipe on the guide pipe; Further comprising a plurality of first protrusions, a plurality of the first protrusions are respectively connected with the first pipe and the second pipe, and a plurality of the first protrusions are arranged at intervals in the height direction of the pipe body, the first protrusion extends in the direction away from the pipe body, and the first protrusion has a preset included angle A between the extension direction and the height direction of the first pipe, the first protrusion has a preset included angle B between the extension direction and the height direction of the second pipe, and 30°≤A=B≤50°.

2. Suction caisson foundation according to claim 1, characterized in that The supporting component has a first position and a second position, in the first position, the first pipe and the second pipe are arranged parallel to the pipe body, in the second position, the pivot connection of the first pipe and the second pipe is away from the pipe body, and the first pipe and the second pipe have an included angle.

3. Suction caisson foundation according to claim 2, characterized in that Further comprising driving component, the driving component is connected with one end of the pipe body away from the second pipe, and the driving component is used to drive the end of the first pipe connected with the guide pipe to move in the height direction of the pipe body.

4. Suction caisson foundation according to any one of claims 1-3, characterized in that The number of the supporting component is multiple, and a plurality of the supporting components are arranged at intervals in the circumferential direction of the pipe body.

5. The suction caisson foundation of claim 1, wherein, Further comprising a plurality of second protrusions, one end of the second protrusion is connected with the pipe body, and a plurality of the second protrusions are arranged at intervals in the circumferential direction of the pipe body.

6. The suction caisson foundation of claim 1, wherein, The side of the guide pipe away from the pipe body is provided with a first grouting hole, The first pipe is provided with a second grouting hole, and the second pipe is provided with a third grouting hole.

7. Suction caisson foundation according to claim 6, characterized in that Further comprising a first grouting pipe, the first grouting pipe is suitable for being arranged in the guide pipe, and one end of the first grouting pipe communicates with the first grouting hole.

8. Suction caisson foundation according to claim 1, characterized in that Further comprising a fairlead, the upper end of the pipe body has a cover, one end of the cover is connected with the fairlead, and the cover is provided with an air extraction hole.

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