Grouting structure device for rear top of steel pipe pile

The rear top grouting structure for steel pipe piles addresses the limited pile-soil contact and weak soil resistance by forming a steel pipe pile wing disc, enhancing bearing capacity and reducing construction costs through efficient grouting without large equipment.

CN222227267UActive Publication Date: 2024-12-24SOUTHEAST UNIV
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Patent Information

Application Number
CN202420622025.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-28
Publication Date
2024-12-24
Estimated Expiration
2034-03-28

AI Technical Summary

Technical Problem

Offshore wind turbine foundations using steel pipe piles face issues with limited pile-soil contact area and weak soil resistance, leading to excessive deformation during extreme weather, which increases construction costs and difficulty.

Method used

A rear top grouting structure device for steel pipe piles, comprising an oil pipe separator, jacks, push rods, wing plates, and annular grouting channels, that expands the pile-soil contact area by forming a steel pipe pile wing disc through grouting, enhancing soil strength without large equipment.

Benefits of technology

The device improves the horizontal and vertical bearing capacity of steel pipe piles by increasing the pile-soil contact area and soil strength, reducing construction costs and complexity.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of civil engineering pile foundations, and particularly relates to a rear jacking grouting structure device for a steel pipe pile, which comprises an oil pipe separator, four jacks, four jacking rods, four wing plates, an annular grouting channel and a grouting channel. The oil pipe separator is located in the steel pipe pile, jacks are arranged in the four directions of the oil pipe separator, and ejector rods are arranged at the ends, away from the oil pipe separator, of the jacks. The ejector rod penetrates through the steel pipe pile, and a wing plate is arranged at the end, away from the jack, of the ejector rod and can be driven by the jack to move in the axial direction of the jack. The inner wall of the steel pipe pile is grooved to form an annular mud jacking channel or arranged on the inner wall of the steel pipe pile. A grouting channel extending to be communicated with the annular grouting channel is formed in the position, facing the wing plate, of the steel pipe pile. The wing plates on the outer wall of the steel pipe pile are ejected open, and then the steel pipe pile wing disc is formed by grouting in the space ejected by the wing plates, so that the pile-soil contact area can be increased, and the strength of soil around the pile can be improved. The structure is convenient to construct, does not need to use any large equipment, greatly reduces the construction cost, and improves the horizontal and vertical bearing capacity of the steel pipe pile at the same time.
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Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering pile foundations, and in particular relates to a back-top grouting structure device for steel pipe piles. Background Art

[0002] At present, the offshore wind power foundation is the key to supporting the entire offshore wind turbine, and the cost accounts for about 20% to 25% of the entire offshore wind power investment. Offshore wind power mostly uses steel pipe pile foundations. The surface soil of the seabed is relatively soft, the contact area between the steel pipe piles and the soil is limited, and the soil resistance is weak. When the offshore wind power is exposed to extreme weather, the wind turbine will overturn due to excessive deformation of the pile foundation. In order to increase the strength of the soil, rotary jet pile reinforcement can be carried out around the pile, or the bearing capacity of the pile foundation can be increased by increasing the depth of the pile into the soil. This not only increases the cost of the foundation project, but also increases the difficulty of construction. In order to increase the pile-soil contact area and improve the strength of the soil around the pile, the invention proposes a rear top grouting wing disc steel pipe pile, which can both increase the pile-soil contact area and improve the strength of the soil around the pile. Moreover, the construction is convenient without the need to borrow any large equipment, which greatly reduces the construction cost and improves the horizontal and vertical bearing capacity of the steel pipe pile. Utility Model Content

[0003] The utility model provides a rear grouting structure device for steel pipe piles, which greatly improves the vertical and horizontal bearing capacity of the steel pipe pile foundation.

[0004] The utility model solves the technical problem by adopting a technical solution: a rear top grouting structure device for steel pipe piles, comprising an oil pipe separator, four jacks, four top rods, four wing plates, an annular grouting channel, and a grouting channel, wherein:

[0005] The oil pipe separator is in the steel pipe pile, and jacks are arranged on four sides of the oil pipe separator, and a mandrel is arranged on one end of the jack away from the oil pipe separator;

[0006] The push rod passes through the steel pipe pile, and a wing plate is arranged at one end of the push rod away from the jack, and the wing plate can be driven by the jack to move along the axial direction of the jack;

[0007] Grooving the inner wall of the steel pipe pile to form an annular grouting channel or setting an annular grouting channel on the inner wall of the steel pipe pile;

[0008] A grouting channel extending toward the wing plate and communicating with the annular grouting channel is provided on the steel pipe pile.

[0009] As a further preferred embodiment of the present invention, a grouting hole is provided on the annular grouting channel, and the annular grouting channel is connected with the grouting channel through the grouting hole.

[0010] As a further preference of the present invention, the cross-section of the annular grouting channel is circular or square, and the diameter of the annular grouting channel is between 30 mm and 50 mm.

[0011] As a further preferred embodiment of the present invention, a one-way grouting valve is arranged in the grouting channel, one end of the one-way grouting valve is connected to the annular grouting channel, and the other end is connected to the outer side of the steel pipe pile.

[0012] As a further preferred embodiment of the present invention, a hole is provided on the steel pipe pile at a position corresponding to the top rod for the top rod to pass through, and the diameter of the hole is 2-3 times of the top rod.

[0013] As a further preferred embodiment of the present invention, a push rod sealing ring is installed in the hole, the outer diameter of the push rod sealing ring is the same as the diameter of the hole, the inner diameter of the push rod sealing ring is the same as the outer diameter of the push rod, and the push rod passes through the push rod sealing ring to be connected to the wing plate.

[0014] As a further preference of the utility model, the wing plate is a circular ring structure of one quarter of the outer circumference of the steel pipe pile, the height of the circular ring structure is 0.5m-1.0m, and the thickness of the circular ring structure is between 10mm-30mm; when the jack is not in operation, the inner wall of the circular ring structure fits with the outer wall of the steel pipe pile.

[0015] As a further preferred embodiment of the present invention, a grouting channel plug is provided on the side of the wing plate facing the steel pipe pile, and the grouting channel plug is provided at a position aligned with the grouting channel.

[0016] As a further preferred embodiment of the present invention, an upper wing plate ring rib and a lower wing plate ring rib distributed vertically are provided on the outer wall of the steel pipe pile, and the distance between the upper wing plate ring rib and the lower wing plate ring rib is the height of the wing plate.

[0017] As a further preference of the present invention, the structures of the upper ring rib and the lower ring rib of the wing plate are consistent, the cross-sections of the upper ring rib and the lower ring rib of the wing plate are both right-angled triangles, and one right-angled side is welded to the steel pipe pile, and the other right-angled side corresponds to the wing plate.

[0018] Through the above technical solution, compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model pushes open the wing plate at the outer wall of the steel pipe pile, and then grouting is performed in the space pushed out by the wing plate to form the steel pipe pile wing plate, thereby increasing the pile-soil contact area and improving the soil strength around the pile.

[0020] The utility model is easy to construct and does not require any large equipment, which greatly reduces the construction cost and improves the horizontal and vertical bearing capacity of the steel pipe piles. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a simple schematic diagram of the overall structure of the preferred embodiment provided by the utility model;

[0023] Figure 2 It is a schematic diagram of the rear top grouting structure device in the preferred embodiment provided by the utility model;

[0024] Figure 3 It is a schematic diagram of opening the rear top grouting structure device in the preferred embodiment provided by the utility model;

[0025] Figure 4 It is a cross-sectional schematic diagram of the rear top grouting structure device in the preferred embodiment provided by the utility model;

[0026] Figure 5 This is a structural effect diagram of the rear top grouting wing disc steel pipe pile in the preferred embodiment provided by the utility model.

[0027] In the figure: 1 is the rear top grouting structure device, 2 is the oil pipe separator, 3 is the jack, 4 is the wing plate, 5 is the upper ring rib of the wing plate, 6 is the top rod, 7 is the lower ring rib of the wing plate, 8 is the top rod sealing ring, 9 is the grouting channel plug, 10 is the one-way grouting valve, 11 is the annular grouting channel, 12 is the steel pipe pile, 13 is the mud surface, 14 is the soil plug, and 15 is the steel pipe pile wing disc. DETAILED DESCRIPTION

[0028] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0029] In the description of the present utility model, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention. Example

[0030] This embodiment provides a preferred implementation scheme, a post-grouting structure device for steel pipe piles, such as Figures 1 to 5 As shown, the rear top grouting structure device 1 includes an oil pipe separator 2, four jacks 3, four push rods 6, four wing plates 4, an annular grouting channel 11, and a grouting channel. The soil plug 14 in the steel pipe pile 12 is much lower than the mud surface 13, and the rear top grouting structure device 1 needs to be set above the soil plug 14.

[0031] The above-mentioned oil pipe separator 2 is in the steel pipe pile 12, and the oil pipe separator 2 is made of steel; jacks 3 are fixedly connected to the four directions of the oil pipe separator 2, and a push rod 6 is arranged at one end of the jack 3 away from the oil pipe separator 2. Preferably, the four jacks 3 are distributed in a cross shape. Through the oil pipe separator 2, four jacks 3 can be pressurized at the same time.

[0032] The push rod 6 passes through the steel pipe pile 12, and a wing plate 4 is provided at one end of the push rod 6 away from the jack 3, and the wing plate 4 can be driven by the jack 3 to move axially along the jack 3. The two ends of the push rod 6 are respectively fixed to the jack 3 and the wing plate 4. Preferably, the wing plate 4 is a circular ring structure of one quarter of the outer circumference of the steel pipe pile 12, the height of the circular ring structure is 0.5m-1.0m, and the thickness of the circular ring structure is between 10mm-30mm; when the jack 3 is not in operation, the inner wall of the circular ring structure fits the outer wall of the steel pipe pile 12.

[0033] An annular grouting channel 11 is formed by grooves on the inner wall of the steel pipe pile 12 or an annular grouting channel 11 is provided on the inner wall of the steel pipe pile 12. Preferably, the cross-section of the annular grouting channel 11 is circular or square, and the diameter of the annular grouting channel 11 is between 30 mm and 50 mm. A grouting channel extending to communicate with the annular grouting channel 11 is provided on the steel pipe pile 12 toward the wing plate 4. Preferably, grouting holes are provided on the annular grouting channel 11, and the annular grouting channel 11 is connected to the grouting channel through the grouting holes. There are four grouting holes, which correspond to the four wing plates 4 one by one. First, the wing plate 4 at the outer wall of the steel pipe pile 12 is pushed open, and then the steel pipe pile wing disc 15 is formed by grouting in the space pushed out by the wing plate 4.

[0034] In this embodiment, a one-way grouting valve 10 is arranged in the grouting channel, one end of the one-way grouting valve 10 is connected to the annular grouting channel 11, and the other end is connected to the outside of the steel pipe pile 12. The one-way grouting valve 10 can prevent the slurry from flowing back during grouting.

[0035] In this embodiment, a hole is provided on the steel pipe pile 12 at a position corresponding to the push rod 6 for the push rod 6 to pass through, and the diameter of the hole is 2-3 times of the push rod 6. A push rod sealing ring 8 is installed in the hole, and the outer diameter of the push rod sealing ring 8 is the same as the diameter of the hole, and the inner diameter of the push rod sealing ring 8 is the same as the outer diameter of the push rod 6. The push rod 6 passes through the push rod sealing ring 8 and is connected to the wing plate 4.

[0036] In this embodiment, a grouting channel plug 9 is arranged on the side of the wing plate 4 facing the steel pipe pile 12, and the grouting channel plug 9 is arranged in a position aligned with the grouting channel. The grouting channel plug 9 can prevent the grouting channel from being blocked during the driving process of the steel pipe pile 12. When the wing plate 4 is pushed out, the grouting channel plug 9 is pulled out accordingly.

[0037] In this embodiment, the upper wing plate ring rib 5 and the lower wing plate ring rib 7 are arranged on the outer wall of the steel pipe pile 12, and the spacing between the upper wing plate ring rib 5 and the lower wing plate ring rib 7 is the height of the wing plate 4. Preferably, the upper wing plate ring rib 5 and the lower wing plate ring rib 7 have the same structure, and the cross-section of the upper wing plate ring rib 5 and the lower wing plate ring rib 7 are both right-angled triangles, and one right-angled side is welded to the steel pipe pile 12, and the other right-angled side corresponds to the wing plate 4. The arrangement of the upper wing plate ring rib 5 and the lower wing plate ring rib 7 can protect the wing plate 4 from displacement, damage and other problems during the driving process of the steel pipe pile 12.

[0038] In this embodiment, after the steel pipe pile 12 is installed, the wing plate 4 can be pushed open by the jack 3, and the distance of the wing plate 4 being pushed open is generally 0.5 times the pile foundation diameter to 1.0 times the pile foundation diameter. However, after the wing plate 4 is opened, grouting begins in the annular grouting channel 11, and the slurry can not only fill the space opened by the wing plate 4, but also spread to the surroundings, eventually forming an enlarged steel pipe pile wing disc 15. The wing disc 15 can both increase the pile-soil contact area and improve the strength of the soil around the pile; and this method of construction does not require any large equipment, which greatly reduces the construction cost, while improving the horizontal and vertical bearing capacity of the steel pipe pile.

[0039] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0040] The meaning of "and / or" described in this application means that the situations where each exists alone or both exist at the same time are included.

[0041] The term “connection” as used in this application may mean a direct connection between components or an indirect connection between components via other components.

[0042] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A post-grouting structure device for steel pipe piles, characterized in that: It comprises an oil pipe separator (2), four jacks (3), four push rods (6), four wing plates (4), an annular grouting channel (11), and a grouting channel, wherein: The oil pipe separator (2) is located in the steel pipe pile (12), jacks (3) are arranged on four directions of the oil pipe separator (2), and a push rod (6) is arranged on one end of the jack (3) away from the oil pipe separator (2); The top rod (6) passes through the steel pipe pile (12), and a wing plate (4) is provided at one end of the top rod (6) away from the jack (3), and the wing plate (4) can be driven by the jack (3) to move along the axial direction of the jack (3); Grooving the inner wall of the steel pipe pile (12) to form an annular grouting channel (11) or providing an annular grouting channel (11) on the inner wall of the steel pipe pile (12); A grouting channel extending toward the wing plate (4) and communicating with the annular grouting channel (11) is provided on the steel pipe pile (12).

2. The device for grouting a steel pipe pile after top grouting according to claim 1 is characterized in that: A grouting hole is provided on the annular grouting channel (11), and the annular grouting channel (11) is connected to the grouting channel through the grouting hole.

3. The device for grouting a steel pipe pile after top grouting according to claim 1 is characterized in that: The cross section of the annular grouting channel (11) is circular or square, and the diameter of the annular grouting channel (11) is between 30 mm and 50 mm.

4. The device for grouting a steel pipe pile rear top according to claim 1, characterized in that: A one-way grouting valve (10) is arranged in the grouting channel, one end of the one-way grouting valve (10) is connected to the annular grouting channel (11), and the other end is connected to the outside of the steel pipe pile (12).

5. The device for grouting a steel pipe pile rear top according to claim 1, characterized in that: A hole is provided on the steel pipe pile (12) at a position corresponding to the top rod (6) for the top rod (6) to pass through, and the diameter of the hole is 2-3 times that of the top rod (6).

6. The device for grouting a steel pipe pile rear top according to claim 5, characterized in that: A push rod sealing ring (8) is installed in the hole, the outer diameter of the push rod sealing ring (8) is the same as the diameter of the hole, the inner diameter of the push rod sealing ring (8) is the same as the outer diameter of the push rod (6), and the push rod (6) passes through the push rod sealing ring (8) and is connected to the wing plate (4).

7. The device for grouting a steel pipe pile rear top according to claim 1, characterized in that: The wing plate (4) is in the form of a circular ring structure that is one quarter of the outer circumference of the steel pipe pile (12). The height of the circular ring structure is between 0.5m and 1.0m, and the thickness of the circular ring structure is between 10mm and 30mm. When the jack (3) is not in operation, the inner wall of the circular ring structure fits the outer wall of the steel pipe pile (12).

8. The device for grouting a steel pipe pile rear top according to claim 1, characterized in that: A grouting channel plug (9) is provided on one side of the wing plate (4) facing the steel pipe pile (12), and the grouting channel plug (9) is provided at a position aligned with the grouting channel.

9. The device for grouting a steel pipe pile rear top according to claim 1, characterized in that: The outer wall of the steel pipe pile (12) is provided with a wing plate upper ring rib (5) and a wing plate lower ring rib (7) distributed up and down, and the distance between the wing plate upper ring rib (5) and the wing plate lower ring rib (7) is the height of the wing plate (4).

10. The device for grouting a steel pipe pile rear top according to claim 9, characterized in that: The wing plate upper ring rib (5) and the wing plate lower ring rib (7) have the same structure. The cross-sections of the wing plate upper ring rib (5) and the wing plate lower ring rib (7) are both right-angled triangles, and one right-angled side of each is welded to the steel pipe pile (12), and the other right-angled side corresponds to the wing plate (4).