Single pile foundation construction device

Abstract

The utility model provides a single pile foundation construction device. The single-pile foundation construction device comprises a sleeve cage arranged outside a steel pipe pile in a sleeving mode and a pumping pipe arranged at the outer end of the steel pipe pile, the upper end of the pumping pipe vertically extends upwards along the steel pipe pile to form an inlet, and the lower end of the pumping pipe vertically extends downwards along the steel pipe pile to form an outlet. The multiple outlets are distributed in the circumference of the steel pipe pile, and the pumping pipe is vertically limited between the sleeve cage and the steel pipe pile. The pumping pipe is arranged in the sleeve cage outside the steel pipe pile from top to bottom, the inlet of the pumping pipe is arranged at the upper end of the pumping pipe, so that the solidified soil is pumped and filled along the steel pipe pile from top to bottom, and the outlets are distributed on the circumference of the steel pipe pile, so that the uniformity of the solidified soil is ensured, and the anti-scouring construction of a large-diameter single pile foundation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of offshore wind power technology, and in particular to a monopile foundation construction device. Background Technology

[0002] In recent years, with the rapid development of new energy sources such as wind power, the installed capacity has continued to expand. As an important part of the wind power industry, the construction of offshore wind power has accelerated and achieved remarkable development results. Monopile foundations, as a commonly used foundation type in near-shore areas, have advantages such as short construction period and no need for seabed preparation. Therefore, monopile foundations have become the most widely used foundation type both domestically and internationally.

[0003] During the construction and operation and maintenance phases of wind farms, especially for monopile foundations, the presence of monopile foundations alters the original hydrodynamic conditions such as waves and currents around the foundation, disrupting the original sediment balance and causing localized scouring around the monopile. The presence of scour pits weakens the soil-pile interaction with the monopile foundation, reducing its bearing capacity and affecting the natural frequency of the entire turbine. This can severely impact the turbine's power generation and structural safety. Therefore, effective scouring prevention measures are crucial for ensuring the normal operation of wind farm units. Only with sufficient pile foundation installation can adequate support be provided for offshore wind turbine units. However, localized scouring often occurs around the pile foundation, reducing its depth and not only lowering the foundation's bearing capacity but also altering the natural frequency of the superstructure, severely impacting the building's dynamic response and stability.

[0004] Existing scour prevention solutions for monopile foundations mostly employ measures such as riprap, sand packing, and stabilized soil. Among these, stabilized soil is currently the most commonly used. However, most existing monopile foundations involve mixing the stabilized soil, then starting a dedicated stabilized soil pump and delivering it through a short pipeline installed on the deck of a transport barge to the monopile foundation, starting the filling process about 3-5 meters above sea level. This method is prone to uneven filling, fails to meet technical requirements, and is not suitable for the construction of scour prevention for large-diameter monopile foundations. Utility Model Content

[0005] The purpose of this utility model is to provide a single pile foundation construction device, which, combined with the pumping pipe formed by the cage on the foundation pile, is suitable for scour prevention construction of large-diameter single pile foundations and ensures the uniformity of solidified soil filling.

[0006] The technical solution of this utility model is: a single pile foundation construction device, including a cage fitted around a steel pipe pile and a pumping pipe installed at the outer end of the steel pipe pile. The upper end of the pumping pipe extends vertically upward along the steel pipe pile to form an inlet, and the lower end of the pumping pipe extends vertically downward along the steel pipe pile to form an outlet. Multiple outlets are arranged on the circumference of the steel pipe pile, and the pumping pipe is vertically limited between the cage and the steel pipe pile.

[0007] In the above scheme, a pumping pipe is installed in the cage outside the steel pipe pile. The pumping pipe is installed from top to bottom with the inlet at the top, so that the solidified soil is pumped and filled from top to bottom along the steel pipe pile. The outlets are arranged in multiple places on the circumference of the steel pipe pile to ensure the uniformity of the solidified soil filling and facilitate the scour prevention construction of large-diameter single pile foundation.

[0008] Preferably, the pumping pipe includes a first pipe, a ring pipe, and a second pipe. The ring pipe is horizontally placed between the cage and the steel pipe pile. One end of the first pipe is the inlet, and the other end of the first pipe is connected to the ring pipe. One end of the second pipe is connected to the ring pipe, and the other end of the second pipe is the outlet.

[0009] Preferably, the ring pipe is installed near the root of the steel pipe pile.

[0010] Preferably, there are multiple second tubes arranged in a circle around the circumference of the annular tube, and each second tube has an outlet.

[0011] Preferably, the inlet is a funnel-shaped opening.

[0012] Preferably, the cage includes multiple ring beams and multiple columns. The multiple ring beams are vertically spaced outside the steel pipe pile, and adjacent ring beams are connected by multiple columns. The uppermost column is connected to the outer platform at the top of the steel pipe pile, and the pumping pipe is located between the ring beams and the steel pipe pile.

[0013] Preferably, the ring beam is fixed to the steel pipe pile by fasteners.

[0014] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0015] I. This utility model sets up a pumping pipe in the cage outside the steel pipe pile. The pumping pipe is set from top to bottom, with the inlet at the top, so that the solidified soil is pumped and filled from top to bottom along the steel pipe pile. The outlet is arranged in multiple places on the circumference of the steel pipe pile to ensure the uniformity of the solidified soil filling and facilitate the anti-scour construction of large-diameter single pile foundation.

[0016] 2. The pumping pipe is positioned between the cage and the steel pipe pile to prevent the pumping pipe from shifting due to vibration during the pumping process.

[0017] 3. The pumping pipe is formed by a first pipe, a second pipe, and a ring pipe, each of which is a single pipe. Multiple connection ports are set on the lower surface of the ring pipe to connect to multiple second pipes, and a connection port is set on the upper surface of the ring pipe to connect to a single first pipe. This allows the solidified soil to enter uniformly from the inlet of the first pipe and then flow out from the respective outlets of the multiple second pipes, thus forming a uniform blowing and filling process. The structure is simple and the construction effect is better. Attached Figure Description

[0018] Figure 1 A schematic diagram of the installation structure of the monopile foundation construction device provided by this utility model on a steel pipe pile;

[0019] Figure 2 For along Figure 1 AA sectional view;

[0020] Figure 3 for Figure 1 Enlarged diagram of point B in the image.

[0021] In the attached diagram: 1. Steel pipe pile; 11. Outer platform; 2. Cage; 21. Ring beam; 22. Column; 23. Fastener; 3. Pumping pipe; 31. Inlet; 32. Outlet; 33. First pipe; 34. Ring pipe; 35. Second pipe; 4. Stabilized soil. Detailed Implementation

[0022] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0023] like Figure 1 As shown, the monopile foundation construction device provided in this embodiment includes a cage 2 and a pumping pipe 3 fitted onto the outside of the steel pipe pile 1.

[0024] The cage 2 includes multiple ring beams 21 and multiple columns 22. The ring beams 21 are annular, with a diameter larger than that of the steel pipe pile 1, and are fitted onto the outside of the steel pipe pile 1 (e.g., Figure 2 As shown in the diagram, a gap exists between the ring beam 21 and the steel pipe pile 1, through which a pumping pipe 3 is installed. Multiple ring beams 21 are spaced apart from top to bottom on the steel pipe pile 1. Adjacent ring beams 21 are connected by multiple columns 22. The uppermost column 22 is connected to the outer platform 11 at the top of the steel pipe pile 1. The ring beams 21 are fixed to the steel pipe pile 1 by fasteners 23.

[0025] The pumping pipe 3 includes a first pipe 33, a ring pipe 34, and a second pipe 35. For example... Figure 2 , Figure 3As shown, the ring pipe 34 is positioned between the steel pipe pile 1 and the ring beam 21. Figure 1 As shown, both the first pipe 33 and the second pipe 35 are vertically arranged. The upper end of the first pipe 33 is located near the outer platform 11. The top of the first pipe 33 forms an inverted L-shape, and its end is a flared opening that extends horizontally away from the steel pipe pile 1. The flared opening is an inlet 31, used to connect to a short-distance conveying pipeline installed on the positioning deck barge.

[0026] The ring pipe 34 is installed near the root of the steel pipe pile 1. The lower end of the first pipe 33 communicates with the upper surface of the ring pipe 34. The lower surface of the ring pipe 34 is provided with multiple through holes, each of which connects to the upper end of a second pipe 35. The second pipes 35 are evenly distributed on the ring pipe 34. The lower end of the second pipe 35 extends to the root of the steel pipe pile 1.

[0027] The material (mixed silty solidified soil) on the deck barge enters the pumping pipe 3 from the conveying pipe and inlet 31 under the action of a special conveying pump. Then, it goes around the ring pipe 34 and falls into the scouring pit of the offshore wind power monopile foundation (steel pipe pile 1) through multiple outlets 32, forming solidified soil 4.

[0028] This invention overcomes the shortcomings of existing monopile foundation scour prevention construction technology and solves the problem of uneven laying in existing scour prevention construction. It is applicable to the construction of integrated auxiliary cage structure for scour prevention construction of large-diameter monopile foundations, with higher efficiency and lower cost.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A monopile foundation construction device, comprising a cage (2) fitted over a steel pipe pile (1), characterized in that, It also includes a pumping pipe (3) installed at the outer end of the steel pipe pile (1). The upper end of the pumping pipe (3) extends vertically upward along the steel pipe pile (1) to form an inlet (31), and the lower end of the pumping pipe (3) extends vertically downward along the steel pipe pile (1) to form an outlet (32). Multiple outlets (32) are arranged on the circumference of the steel pipe pile (1). The pumping pipe (3) is vertically limited between the cage (2) and the steel pipe pile (1).

2. The monopile foundation construction device according to claim 1, characterized in that, The pumping pipe (3) includes a first pipe (33), a ring pipe (34) and a second pipe (35). The ring pipe (34) is horizontally placed between the cage (2) and the steel pipe pile (1). One end of the first pipe (33) is the inlet (31), and the other end of the first pipe (33) is connected to the ring pipe (34). One end of the second pipe (35) is connected to the ring pipe (34), and the other end of the second pipe (35) is the outlet (32).

3. The monopile foundation construction device according to claim 2, characterized in that, The ring pipe (34) is set near the root of the steel pipe pile (1).

4. The monopile foundation construction device according to claim 2, characterized in that, There are multiple second tubes (35) that are circumferentially connected to the circumference of the ring tube (34), and each second tube (35) has an outlet (32).

5. The monopile foundation construction device according to claim 1, characterized in that, The entrance (31) is a flared opening.

6. The monopile foundation construction device according to claim 1, characterized in that, The cage (2) includes multiple ring beams (21) and multiple columns (22). The multiple ring beams (21) are vertically spaced outside the steel pipe pile (1). Adjacent ring beams (21) are connected by multiple columns (22). The uppermost column (22) is connected to the outer platform (11) at the top of the steel pipe pile (1). The pumping pipe (3) is located between the ring beams (21) and the steel pipe pile (1).

7. The monopile foundation construction device according to claim 6, characterized in that, The ring beam (21) is fixed to the steel pipe pile (1) by fasteners (23).

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