Bionic uplift steel pipe pile

Abstract

The utility model discloses a bionic anti -pulling steel pipe pile, including steel pipe pile main part, steel pipe pile main part outer wall is along the first longitudinal resistance band and second longitudinal resistance band with the length of the layout of the depth direction, steel pipe pile main part outer wall is along the annular resistance band and is arranged, first longitudinal resistance band, second longitudinal resistance band, annular resistance band on respectively be equipped with a plurality of resistance cone body of the cone tip to steel pipe pile depth direction, first longitudinal resistance band, second longitudinal resistance band and annular resistance band are used for when steel pipe pile penetrates and forms the interlocking effect through resistance cone body and the soil body around the pile. The utility model compared with simply variable cross section steel pipe pile has reduced the penetration resistance, and the pile side friction resistance in the anti -pulling direction has been improved significantly to reach the effect of improving the anti -pulling performance of steel pipe pile greatly, and the safe operation of offshore photovoltaic platform is guaranteed.

Description

Technical Field

[0001] This utility model relates to a structure for offshore wind power piles, and more particularly to a biomimetic pull-out resistant steel pipe pile. Background Technology

[0002] With the surging demand for clean energy and the increasing scarcity of high-quality land resources, offshore photovoltaic (PV) power generation, as a new model utilizing vast sea areas, has shown enormous development potential. Compared with onshore wind power generation, offshore PV boasts higher power generation capacity, better stability, less negative environmental impact, and is less affected by social factors, exhibiting more significant advantages and promising development prospects.

[0003] Steel pipe piles are the main foundation type for offshore photovoltaic platforms. Offshore photovoltaic platforms are subjected to sea winds and pull-out forces for a long time. Especially in the context of strong sea winds and frequent extreme weather, the construction of offshore photovoltaic platforms places higher demands on the pull-out performance of steel pipe pile foundations.

[0004] Therefore, there is an urgent need to design a new type of pull-out resistant steel pipe pile to replace the conventional steel pipe pile foundation used in offshore photovoltaic platforms, so as to significantly improve the pull-out resistance of offshore photovoltaic power generation platforms and thus ensure the safe operation and maintenance of offshore photovoltaic platforms. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to provide a biomimetic pull-out steel pipe pile that can increase the pile side friction resistance in the pull-out direction, thereby significantly improving the pull-out performance of the steel pipe pile.

[0006] Technical Solution: The biomimetic pull-out resistant steel pipe pile of this utility model includes a steel pipe pile body. The outer wall of the steel pipe pile body is provided with a first longitudinal resistance zone and a second longitudinal resistance zone along the burial depth direction. The outer wall of the steel pipe pile body is provided with a circumferential resistance zone. Several resistance cones are respectively provided on the first longitudinal resistance zone, the second longitudinal resistance zone, and the circumferential resistance zone to form an interlocking structure between the first longitudinal resistance zone, the second longitudinal resistance zone, the circumferential resistance zone and the surrounding soil after the steel pipe pile is penetrated. The cone apex of the resistance cone faces the burial depth direction of the steel pipe pile to reduce the penetration resistance of the steel pipe pile, and the cone bottom of the resistance cone faces the opposite direction of the burial depth direction of the steel pipe pile to increase the pile side friction resistance cone in the pull-out direction.

[0007] The resistance cone is a polygonal cone, with its tip pointing towards the depth of the steel pipe pile and its base pointing in the opposite direction. The tip reduces the penetration resistance of the steel pipe pile, while the base increases the side friction resistance in the pull-out direction. The resistance cone can be a prismatic pyramid or a cone.

[0008] The resistance cones on the first longitudinal resistance band and the resistance cones on the second longitudinal resistance band are staggered along the burial depth direction.

[0009] The outer wall of the main body of the steel pipe pile is provided with two opposing first longitudinal resistance bands and two opposing second longitudinal resistance bands.

[0010] The resistance cones on the first and second longitudinal resistance bands are spaced apart in the longitudinal direction, while the resistance cones on the circumferential resistance band are spaced apart in the transverse direction.

[0011] The angle between adjacent first and second longitudinal resistance zones is 90°; that is, the line connecting the opposite first and second longitudinal resistance zones is perpendicular.

[0012] The circumferential resistance band is located at the middle of the outer wall of the steel pipe pile body along the burial depth direction.

[0013] The first longitudinal resistance band, the second longitudinal resistance band, and the circumferential resistance band are all made of steel plates.

[0014] The outer wall of the main body of the steel pipe pile is connected to the first longitudinal resistance zone, the second longitudinal resistance zone and the circumferential resistance zone by welding.

[0015] The main body of the steel pipe pile is a pipe pile structure with a uniform cross-section, and both the upper and lower ends are open.

[0016] The orientation of the cone tip of the resistance cone on the steel pipe pile in this invention is similar to the orientation of snake scales on a snake's body. The cone tip is small and the base is large, similar to the small head and large body of a snake's scales. The orientation of the cone tip of this invention is consistent with the direction of penetration of the steel pipe pile. Just as the tip of a snake's scales is aligned with the direction of its movement, the resistance encountered by a snake in the forward direction is relatively small. Similarly, the resistance encountered by the steel pipe pile in the penetration direction is relatively small due to the orientation of the cone tip of the resistance cone, facilitating penetration. At the same time, similar to the expansion angle of scales, which increases resistance in the backward direction, the steel pipe pile of this invention, due to the angle between its side and bottom surfaces and the larger base area than the cone tip, experiences greater resistance when moving in the opposite direction of penetration. In other words, compared with a simple variable cross-section steel pipe pile, this invention reduces the resistance in the penetration direction and can also significantly improve the pile side friction resistance in the pull-out direction.

[0017] Beneficial effects: Compared with the prior art, this utility model achieves the following significant effects:

[0018] The steel pipe pile of this utility model is equipped with a resistance cone whose apex faces the same direction as the steel pipe pile's penetration direction. When the pull-out steel pipe pile penetrates the soil, the first longitudinal resistance, the second longitudinal resistance zone, and the circumferential resistance zone form an interlocking effect with the surrounding soil through several resistance cones on them. The resistance cones have a large base and a small tip, with the larger base directly contacting the surrounding soil. At this time, the roughness of the pile-soil interface is significantly improved due to the presence of the resistance cones. Furthermore, since the tip of the resistance cone faces the burial depth direction and the base faces the opposite direction, compared to a simple variable cross-section steel pipe pile, the penetration resistance is reduced during penetration, and the pile side friction resistance in the pull-out direction is significantly improved. This achieves the effect of greatly improving the pull-out performance of the steel pipe pile and ensuring the safe operation and maintenance of offshore photovoltaic platforms. Attached Figure Description

[0019] Figure 1 This is the front view of the biomimetic pull-out resistant steel pipe pile of this utility model;

[0020] Figure 2 This is a side view of the biomimetic pull-out resistant steel pipe pile of this utility model;

[0021] Figure 3 This is a top view of the biomimetic pull-out resistant steel pipe pile of this utility model;

[0022] Figure 4 This is a partially enlarged structural diagram of the first and second longitudinal resistance zones of the biomimetic pull-out resistant steel pipe pile of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the biomimetic pull-out resistant steel pipe pile of this utility model in soil. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0025] like Figures 1-3 As shown, this utility model provides a biomimetic pull-out resistant steel pipe pile, including a steel pipe pile body 1. The steel pipe pile body 1 is a pipe pile structure with a uniform cross-section and open at both the top and bottom. Two opposing first longitudinal resistance bands 2 and two opposing second longitudinal resistance bands 3 are arranged along the entire length of the outer wall of the steel pipe pile body 1 in the burial depth direction. The lines connecting the two first longitudinal resistance bands 2 and the two second longitudinal resistance bands 3 are perpendicular, that is, the angle between adjacent first longitudinal resistance bands 2 and second longitudinal resistance bands 3 is 90°. A circumferential resistance band 4 is arranged around the outer wall of the steel pipe pile body 1 at the middle position of the burial depth. In this embodiment, the first longitudinal resistance band 2, the second longitudinal resistance band 3, and the circumferential resistance band 4 are all steel plates. The steel plates have the same curvature as the outer wall of the steel pipe pile, are used to fit against the outer wall of the steel pipe pile, and are fixedly connected to the outer wall of the steel pipe pile by welding.

[0026] Several spaced resistance cones 5 are welded onto the first longitudinal resistance zone 2, the second longitudinal resistance zone 3, and the circumferential resistance zone 4. In this embodiment, the resistance cones 5 are triangular pyramids, but can also be other shapes of pyramids or cones; the apex of the cone faces the direction of the steel pipe pile's embedment depth, and the base faces the opposite direction; the apex is used to reduce the penetration resistance of the steel pipe pile, and the base is used to increase the resistance in the pull-out direction. After the steel pipe pile is penetrated, the first longitudinal resistance zone 2, the second longitudinal resistance zone 3, and the circumferential resistance zone 4 form an interlocking effect with the surrounding soil through the resistance cones 5 on them, such as... Figure 5 As shown, after the pull-out steel pipe pile penetrates the soil, the bottom of the resistance cone 5 is in direct contact with the soil around the pile. At this time, the roughness of the pile-soil interface is significantly increased due to the presence of the resistance cone 5. Furthermore, since the top of the resistance cone 5 faces the direction of the burial depth and the bottom faces the opposite direction of the burial depth, the frictional resistance of the pile-soil side is increased.

[0027] The resistance cones 5 on the first longitudinal resistance band 2 and the second longitudinal resistance band 3 are arranged at intervals in the longitudinal direction, and the resistance cones 5 on the circumferential resistance band 4 are arranged at intervals in the transverse direction.

[0028] like Figure 4 As shown, the resistance cones 5 on adjacent first longitudinal resistance zones 2 and second longitudinal resistance zones 3 are staggered along the burial depth direction. Figure 4 It can be seen that the resistance cone 5 on the first longitudinal resistance zone 2 and the resistance cone 5 on the second longitudinal resistance zone 3 differ in the burial depth direction from the height of one resistance cone.

[0029] Calculations show that the unit side resistance of the steel pipe pile provided by this utility model is increased by 48.43% compared with the traditional steel pipe pile, which greatly improves the pull-out resistance of the steel pipe pile.

Claims

1. A biomimetic anti-uplift steel pipe pile, characterized in that, The system includes a steel pipe pile body (1), on which a first longitudinal resistance zone (2) and a second longitudinal resistance zone (3) are arranged along the burial depth direction on the outer wall of the steel pipe pile body (1); a circumferential resistance zone (4) is arranged along the circumferential direction on the outer wall of the steel pipe pile body (1); a plurality of resistance cones (5) are respectively provided on the first longitudinal resistance zone (2), the second longitudinal resistance zone (3), and the circumferential resistance zone (4) to form an interlocking between the first longitudinal resistance zone (2), the second longitudinal resistance zone (3), and the circumferential resistance zone (4) and the surrounding soil after the steel pipe pile is penetrated; the cone top of the resistance cone faces the burial depth direction of the steel pipe pile to reduce the penetration resistance of the steel pipe pile, and the cone bottom of the resistance cone faces the opposite direction of the burial depth direction of the steel pipe pile to increase the pile side friction resistance cone in the pull-out direction.

2. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The resistance cones (5) on the first longitudinal resistance zone (2) and the resistance cones (5) on the second longitudinal resistance zone (3) are staggered along the burial depth direction.

3. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The resistance cone (5) is a pyramid or a cone.

4. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The outer wall of the main body (1) of the steel pipe pile is provided with two opposing first longitudinal resistance bands (2) and two opposing second longitudinal resistance bands (3).

5. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The angle between the adjacent first longitudinal resistance band (2) and the second longitudinal resistance band (3) is 90°.

6. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The resistance cones (5) on the first longitudinal resistance band (2) and the second longitudinal resistance band (3) are arranged at intervals in the longitudinal direction, and the resistance cones (5) on the circumferential resistance band (4) are arranged at intervals in the transverse direction.

7. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The circumferential resistance band (4) is located at the middle of the outer wall of the steel pipe pile body (1) along the burial depth direction.

8. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The first longitudinal resistance band (2), the second longitudinal resistance band (3), and the circumferential resistance band (4) are all made of steel plates.

9. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The outer wall of the main body (1) of the steel pipe pile is connected to the first longitudinal resistance zone (2), the second longitudinal resistance zone (3) and the circumferential resistance zone (4) by welding.

10. The biomimetic pull-out resistant steel pipe pile according to claim 1, characterized in that, The main body (1) of the steel pipe pile is a pipe pile structure with a uniform cross section, and both the upper and lower ends are open.

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