Grouting pile shoe foundation device of offshore wind power self-elevating converter station platform

Abstract

The utility model relates to the technical field of pile shoe foundations, in particular to an offshore wind power self-elevating converter station platform grouting pile shoe foundation device which comprises a middle stand column and a pile shoe, the middle stand column is arranged on the pile shoe, and a plurality of vertical grouting pipelines penetrating through the upper end and the lower end of the middle stand column are arranged in the middle stand column. A plurality of pile shoe grouting pipelines penetrating through the upper surface and the side face of the pile shoe are arranged in the pile shoe. In practical application, after grouting is injected into a preset position, the horizontal anchoring reinforcing rod piece begins to move towards the periphery, and the stability in the grouting process can be monitored by monitoring the slurry flow; after grouting is completed, the bearing area can be enlarged, and the foundation is prevented from rotating under long-term storm load; and the grouting suction pipe is slowly lifted during grouting, so that cavities caused by non-uniform grouting can be effectively prevented, and the problems that the horizontal anchoring reinforcing rod piece is not ejected in place and the inclined anchoring reinforcing rod piece retracts can also be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pile shoe foundations, and in particular to a grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform. Background Art

[0002] With the gradual saturation of offshore wind farms, the marine wind energy industry will gradually expand to deeper seas in the future. The installation cost of wind power-related equipment is higher, the risk is greater, and the required bearing capacity is higher. The large-scale construction of offshore wind farms makes it impossible for small converter stations to meet the high-power current conversion, and it is necessary to build larger converter stations. Since large converter stations are too large, loading ships cannot be used for lifting and construction. Therefore, the converter stations are pre-installed on self-elevating platforms, and the conductor frame-pile shoe foundation is pre-installed at the target location. When the tide is high, the converter station is pulled above the foundation as a whole, and the converter station platform is connected to the conductor frame when the tide is low.

[0003] In the future, the mainstream choice for large-scale converter stations will be self-elevating platforms, whose foundation form is pile shoe foundation. Traditional pile shoe foundations often overturn due to wave scouring and excessive settlement. At the same time, the pile shoe itself has a large weight. Improving stability by increasing the diameter of the pile shoe foundation will cause certain difficulties in the transportation and installation of the pile shoe. If the construction of the pile shoe foundation can be simple while taking into account the service life of the foundation, it will greatly improve the safety and economy of the equipment. Utility Model Content

[0004] The utility model aims to provide a grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform.

[0005] The utility model provides the following technical solutions:

[0006] The utility model proposes a grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform, comprising a central column and a pile shoe, wherein the central column is arranged on the pile shoe, wherein a plurality of vertical grouting pipes penetrating the upper and lower ends of the central column are provided in the central column, and a plurality of pile shoe grouting pipes penetrating the upper surface and the side of the pile shoe are provided in the pile shoe;

[0007] The pile shoe grouting pipe includes a connecting pipe and a horizontal pipe. One end of the connecting pipe passes through the upper surface of the pile shoe and is connected to the vertical grouting pipe, and the other end of the connecting pipe is connected to the horizontal pipe. One end of the horizontal pipe close to the side of the pile shoe is connected to a pair of inclined grouting pipes that can pass through the upper and lower surfaces of the pile shoe.

[0008] Furthermore, a horizontal anchoring reinforcement rod is arranged in the horizontal pipeline to prevent seawater from entering the device, and an oblique anchoring reinforcement rod is arranged in the oblique grouting pipeline.

[0009] Furthermore, the ends of the horizontal anchoring reinforcement rod and the oblique anchoring reinforcement rod in contact with the surface of the pile shoe are provided with mushroom nails.

[0010] Furthermore, the horizontal anchoring reinforcement rod is solid, and the oblique anchoring reinforcement rod is hollow.

[0011] Furthermore, the device also includes a grouting suction pipe, which is fitted into the vertical grouting pipe, the grouting suction pipe is slidably matched with the vertical grouting pipe, and the length of the grouting suction pipe is greater than the height of the vertical grouting pipe.

[0012] Furthermore, the vertical grouting pipe is a steel pipe.

[0013] In actual application, after the grouting is penetrated into the predetermined position, the horizontal anchoring reinforcement rod begins to move around, and the stability of the grouting process can be monitored by monitoring the slurry flow rate. Once the foundation is offset or rotated, it can be corrected by controlling the grouting flow rate; after the grouting is completed, the bearing area can be expanded and the foundation can be prevented from rotating under long-term wind and wave loads; the grouting suction pipe is slowly lifted during grouting, which can effectively prevent the uneven grouting from causing voids, and can also prevent the problems of the horizontal anchoring reinforcement rod not being able to be ejected into place and the oblique anchoring reinforcement rod from shrinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-section structure of the neutral column and pile shoe.

[0015] Figure 2 It is a schematic diagram of the structure when grouting, pipe extraction and reinforcement rods are used.

[0016] Figure 3 This is a schematic diagram of the structure of the grouting suction pipe and reinforcement rods in the grouting pipeline before grouting.

[0017] In the figure, 1-center column, 2-pile shoe, 3-vertical grouting pipe, 4-pile shoe grouting pipe, 5-connecting pipe, 6-horizontal pipe, 7-oblique grouting pipe, 8-mushroom nail, 9-horizontal anchor reinforcement rod, 10-oblique anchor reinforcement rod, 11-grouting suction pipe. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] See also Figure 1-Figure 3 , the utility model provides an embodiment:

[0020] In one embodiment of the utility model, a grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform comprises a central column 1 and a pile shoe 2, wherein the central column 1 is arranged on the pile shoe 2, a plurality of vertical grouting pipes 3 penetrating the upper and lower ends of the central column 1 are provided in the central column 1, and a plurality of pile shoe grouting pipes 4 penetrating the upper surface and the side of the pile shoe are provided in the pile shoe 2;

[0021] The pile shoe grouting pipe 4 includes a connecting pipe 5 and a horizontal pipe 6. One end of the connecting pipe 5 passes through the upper surface of the pile shoe and is connected to the vertical grouting pipe 3, and the other end of the connecting pipe 5 is connected to the horizontal pipe 6. One end of the horizontal pipe 6 close to the side of the pile shoe 2 is connected to a pair of inclined grouting pipes 7 that can pass through the upper and lower surfaces of the pile shoe. By grouting into the vertical grouting pipe, the slurry flows into the pile shoe grouting pipe 4 and flows out from the upper surface and side of the pile shoe, thereby increasing the bearing surface and preventing the foundation from rotating under long-term wind and wave loads.

[0022] In one embodiment of the utility model, a horizontal anchoring reinforcement rod 9 is installed in the horizontal pipe 6 to prevent seawater from entering the device, and an oblique anchoring reinforcement rod 10 is installed in the oblique grouting pipe 7 .

[0023] In the above embodiment, the ends of the horizontal anchor reinforcement rod 9 and the oblique anchor reinforcement rod 10 that are in contact with the surface of the pile shoe have mushroom nails 8; the mushroom nails 8 can prevent mud and sand from entering the pile shoe to form a soil plug.

[0024] In the above embodiment, the horizontal anchor reinforcement rod 9 is solid, and the oblique anchor reinforcement rod 10 is hollow; the solid horizontal anchor reinforcement rod can provide higher shear resistance; the hollow oblique anchor reinforcement rod is convenient for the slurry to push it out to realize grouting of the oblique grouting pipe 7.

[0025] In one embodiment of the utility model, the device also includes a grouting suction pipe 11, which is fitted in the vertical grouting pipe 3, and the grouting suction pipe 11 slides with the vertical grouting pipe 3, and the length of the grouting suction pipe 11 is greater than the height of the vertical grouting pipe 3; it is convenient to lift the grouting suction pipe 11 upward while grouting, effectively preventing uneven grouting from causing voids, and also preventing the horizontal anchor reinforcement rod 9 from being pushed out of place and the oblique anchor reinforcement rod 10 from retracting.

[0026] In one embodiment of the utility model, the vertical grouting pipe 3 is a steel pipe; during the grouting process, the friction between the grouting suction pipe 1 and the vertical grouting pipe 3 can be reduced. After the grouting is completed, the steel pipe and the slurry form a steel tube concrete structure, thereby improving the bearing capacity of the center column.

[0027] In actual application, the grouting suction pipe 11 is extended to the bottom of the vertical grouting pipe 3 and fitted with the vertical grouting pipe 3 to carry out grouting. After the slurry penetrates into the predetermined position, the horizontal anchoring reinforcement rod 9 begins to extend to the surrounding area. The stability of the grouting process is monitored by monitoring the slurry flow. Once the foundation is offset or rotated, it can be corrected by controlling the grouting flow. During grouting, the grouting suction pipe 11 is slowly lifted to prevent uneven grouting from causing voids, and to prevent the horizontal anchoring reinforcement rod from being unable to be ejected and the oblique anchoring reinforcement rod from retracting.

[0028] The implementation modes of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform, characterized in that: It comprises a central column and a pile shoe, wherein the central column is arranged on the pile shoe, a plurality of vertical grouting pipes penetrating the upper and lower ends of the central column are provided in the central column, and a plurality of pile shoe grouting pipes penetrating the upper surface and the side surface of the pile shoe are provided in the pile shoe; The pile shoe grouting pipe includes a connecting pipe and a horizontal pipe. One end of the connecting pipe passes through the upper surface of the pile shoe and is connected to the vertical grouting pipe, and the other end of the connecting pipe is connected to the horizontal pipe. One end of the horizontal pipe close to the side of the pile shoe is connected to a pair of inclined grouting pipes that can pass through the upper and lower surfaces of the pile shoe.

2. The grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform according to claim 1 is characterized by: The horizontal pipeline is provided with a horizontal anchoring reinforcement rod for preventing seawater from entering the device, and the oblique grouting pipeline is provided with an oblique anchoring reinforcement rod.

3. The grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform according to claim 2 is characterized in that: The ends of the horizontal anchoring reinforcement rod and the oblique anchoring reinforcement rod in contact with the surface of the pile shoe are provided with mushroom nails.

4. The grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform according to claim 2 is characterized by: The horizontal anchoring reinforcement rod is solid, and the oblique anchoring reinforcement rod is hollow.

5. The grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform according to claim 1 is characterized in that: The device also includes a grouting suction pipe, which is fitted in the vertical grouting pipe, the grouting suction pipe and the vertical grouting pipe are slidably matched, and the length of the grouting suction pipe is greater than the height of the vertical grouting pipe.

6. The grouting pile shoe foundation device for an offshore wind power self-elevating converter station platform according to claim 1 is characterized by: The vertical grouting pipeline is a steel pipe.

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