Circular sheet pile with flanges

Abstract

The application relates to the field of building technology, in particular to a circular sheet pile with flanges. A circular sheet pile with flanges comprises a pile body, a male flange and a female flange, the male flange and the female flange are fixedly arranged on the outer wall of the pile body, the length direction of the male flange and the length direction of the female flange are parallel to the center line of the pile body, and the male flange and the female flange are symmetrically arranged along the diameter direction of the pile body; when the tenon of the male flange of two adjacent pile bodies is embedded into the groove of the female flange, the center of the tenon and the center of the groove coincide, and a gap is arranged between the first splicing surface of the male flange and the second splicing surface of the female flange, so that the male flange can rotate around the center. The application solves the problem that the adaptability of traditional sheet piles to complex river shorelines is insufficient.

Description

Technical Field

[0001] This application relates to the field of building technology, and in particular to a flanged circular sheet pile. Background Technology

[0002] Retaining walls are a common structural form in civil engineering, used to prevent soil collapse or water erosion. Traditional retaining wall structures include gravity retaining walls, cantilever retaining walls, and sheet pile retaining walls. In recent years, with the acceleration of urbanization and the increasing environmental protection requirements, higher demands have been placed on the strength, durability, and construction efficiency of retaining wall structures. Sheet pile retaining walls, with their convenient construction and strong adaptability, have gradually become the mainstream choice.

[0003] In riverbank protection projects, sheet piles are not well adapted to complex terrains (such as riverbanks). Riverbanks typically have irregular shapes and varied topography, making it difficult for traditional sheet piles to fit well with different terrains and to be effectively adjusted according to the curves and undulations of the riverbank. This results in large gaps between adjacent sheet piles in riverbank protection projects. At the same time, the lack of flexible connection methods between piles makes it impossible to ensure the continuity of the retaining wall, ultimately leading to a significant decrease in overall protection performance and bearing capacity, making it difficult to meet the requirements of riverbank protection projects. Utility Model Content

[0004] To address the problem of traditional sheet piles being insufficiently adaptable to complex riverbanks, this application provides a flanged circular sheet pile.

[0005] This application provides a flanged circular sheet pile, which adopts the following technical solution: A flanged circular sheet pile includes a pile body, a male flange, and a female flange. Both the male flange and the female flange are fixedly disposed on the outer wall of the pile body. The length directions of both the male flange and the female flange are parallel to the axis of the pile body. The male flange and the female flange are symmetrically arranged along the diameter direction of the pile body. When the tenons of the male flanges on two adjacent pile bodies are inserted into the grooves of the adjacent female flanges, the center of the tenon coincides with the center of the groove, and a gap is provided between the first splicing surface of the male flange and the second splicing surface of the female flange to allow the male flange to rotate around the center.

[0006] By adopting the above technical solution, when two adjacent sheet piles are spliced, after the tenon of the yang flange of the pile body is inserted into the groove of the yin flange of the adjacent pile body, the center of the tenon and the center of the groove are completely coincident, providing a stable axial foundation for subsequent rotation and avoiding misalignment during splicing; a gap is reserved between the first splicing surface of the yang flange and the second splicing surface of the yin flange, so that the yang flange can rotate freely around the coincident center, allowing the sheet pile to flexibly adjust the splicing angle according to the circumference of the riverbank, solving the problem of insufficient adaptability of traditional sheet piles to complex riverbanks, and realizing continuous seamless retaining along the riverbank.

[0007] Optionally, the angle between the first splicing surface and the radial extension line of the tenon is an acute angle; the second splicing surface is parallel to the radial extension line of the groove.

[0008] By adopting the above technical solution, the radius extension lines of the first splicing surface and the tenon are at an acute angle, and the radius extension line of the second splicing surface is parallel to that of the groove. When adjacent sheet piles are subjected to lateral earth pressure, the acute-angled first splicing surface will form a closer fit with the parallel second splicing surface, reducing the risk of leakage at the gap and enhancing the soil retention and seepage prevention effect. The acute angle design is to reserve a gap between the first and second splicing surfaces. While ensuring the fit effect, when the male flange rotates around the center, the contact form between the acute angle surface and the parallel surface will not cause jamming. This can maintain the flexibility of the sheet pile to adjust the angle along the riverbank, taking into account both sealing and adaptability.

[0009] Optionally, the angle between the first splicing surface and the radial extension line of the tenon is in the range of 5°-8°.

[0010] By adopting the above technical solution, setting the angle range to 5°-8° effectively limits the amplitude of the tenon's rotation around the center, preventing structural displacement at the sheet pile joint due to excessive angle, and ensuring that the retaining structure maintains a stable shape under lateral earth pressure. The included angle range does not completely lock the rotation space, still providing sufficient angle adjustment margin for the sheet pile. During construction, it can be flexibly adjusted according to the slight differences in the riverbank direction without additional cutting, taking into account both construction convenience and bank fit.

[0011] Optionally, a first angle is formed between the line connecting the end of the second splicing surface near the groove to the center of the groove and the line connecting the end of the second splicing surface away from the groove to the center of the groove, the first angle ranging from 5° to 8°; a second angle is formed between the line connecting the end of the second splicing surface away from the groove to the center of the groove and the extension line of the radius of the center of the groove, the second angle ranging from 5° to 8°; wherein, the extension line of the radius of the center of the groove is parallel to the second splicing surface.

[0012] By adopting the above technical solution and simultaneously limiting the angle range of the first and second included angles, the symmetry of the processing of the two side walls of the groove is ensured, reducing the problem of side wall asymmetry caused by processing deviations from the source, and ensuring that the groove structure specifications of each sheet pile are uniform. The fixed angle range allows the second splicing surface of the groove to be precisely matched with the first splicing surface of the tenon, preventing situations where the gap is too large or too tight to rotate due to angle deviations. At the same time, the tight fit can directly reduce the gaps at the splice, fundamentally reducing the risk of poor sealing, and fundamentally improving the overall performance and service life of the sheet pile retaining wall.

[0013] Optionally, the pile may also include a reinforcing cage disposed within the pile body; the reinforcing cage includes a plurality of main bars and stirrups, the plurality of main bars extending along the length of the pile body, and the stirrups surrounding the main bars.

[0014] By adopting the above technical solution, the reinforcing cage provides the sheet pile with key bending strength and crack resistance. Through the synergistic effect of the main reinforcement and stirrups, the pile body is formed into a highly integrated load-bearing component. The main reinforcement extending along the length of the pile body can directly bear the main tensile and compressive forces generated by the soil pressure and bending moment, preventing the pile body from breaking due to concentrated stress. The stirrups surrounding the main reinforcement can precisely connect the dispersed main reinforcement to form an integrated load-bearing system, while restraining the lateral deformation of the pile body concrete and reducing the risk of cracking. It not only provides durable support during the use of sheet piles, but also protects the pile body during hoisting and transportation, preventing structural damage caused by external impacts and extending the overall service life of the pile body.

[0015] Optionally, it also includes two end plates, which are respectively disposed on the top and bottom surfaces of the pile body, and the end plates and several main reinforcement bars are fixedly connected by a snap-fit ​​assembly.

[0016] By adopting the above technical solution, the end plate is fixed to the main reinforcement through the snap-fit ​​assembly, so that the end plate and the steel cage form a rigid connection. On the one hand, it restricts the axial displacement and lateral deformation of the main reinforcement, and enhances the overall load-bearing capacity of the steel cage as a skeleton. On the other hand, it provides a flat and uniform connection benchmark for the vertical docking of adjacent sheet piles. Furthermore, adjacent end plates can be fixed by welding, which reduces installation errors and improves construction efficiency and connection accuracy.

[0017] Optionally, the snap-fit ​​assembly includes a first circular hole, a second circular hole, a connecting hole, and a limiting block disposed on the main rib, all disposed on the end plate; the connecting hole is used to connect the first circular hole and the second circular hole, the diameter of the first circular hole is larger than the diameter of the second circular hole, the diameter of the limiting block is larger than the diameter of the main rib, the diameter of the limiting block is smaller than the diameter of the first circular hole, and the diameter of the limiting block is larger than the diameter of the second circular hole; when the main rib is embedded in the first circular hole, it is embedded in the second circular hole through the connecting hole.

[0018] By adopting the above technical solution, during installation, simply insert the limiting block on the main reinforcement bar into the larger diameter first circular hole on the end plate, and then slide it laterally along the connecting hole into the smaller diameter second circular hole to complete the locking. The diameter of the limiting block on the main reinforcement bar is larger than the second circular hole but smaller than the first circular hole. When the main reinforcement bar slides into the second circular hole, the limiting block is blocked by the edge of the second circular hole and cannot be reversed back to the first circular hole, forming a mechanical self-locking structure. This effectively prevents the main reinforcement bar from separating from the end plate, ensures connection stability, improves the assembly efficiency of the steel cage and the end plate, and is more suitable for industrialized assembly line operations.

[0019] Optionally, the stirrup is a spiral stirrup.

[0020] By adopting the above technical solution, the spiral hoop continuously wraps around the main reinforcement to form a spiral structure, which can apply lateral restraint to the main reinforcement. Compared with traditional ring hoop, it can more uniformly restrict the deformation of the main reinforcement, while suppressing radial cracking of the pile concrete caused by stress and improving the overall crack resistance.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. When two adjacent sheet piles are spliced, after the tenon of the yang flange of the pile body is inserted into the groove of the yin flange of the adjacent pile body, the center of the tenon and the center of the groove are completely coincident, providing a stable axial foundation for subsequent rotation and avoiding misalignment during splicing; a gap is reserved between the first splicing surface of the yang flange and the second splicing surface of the yin flange, so that the yang flange can rotate freely around the coincident center, so that the sheet pile can flexibly adjust the splicing angle according to the circumference of the riverbank, solving the problem of insufficient adaptability of traditional sheet piles to complex riverbanks, and realizing continuous seamless retaining along the riverbank; 2. The end plate is fixed to the main reinforcement by snap-fit ​​assembly, so that the end plate and the reinforcement cage form a rigid connection. On the one hand, it restrains the axial displacement and lateral deformation of the main reinforcement, and enhances the overall load-bearing capacity of the reinforcement cage as a skeleton. On the other hand, it provides a flat and uniform connection benchmark for the vertical docking of adjacent sheet piles. Furthermore, adjacent end plates can be fixed by welding, which reduces installation errors and improves construction efficiency and connection accuracy. Attached Figure Description

[0022] Figure 1This is a schematic diagram of two sheet piles spliced ​​in an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 3 This is a partial schematic diagram of the male flange in an embodiment of this application; Figure 4 This is a partial schematic diagram of the female flange in an embodiment of this application; Figure 5 This is a structural schematic diagram of the pile body and the reinforcing cage in the embodiments of this application; Figure 6 This is a schematic diagram of the pile body and end plate in the embodiments of this application; Figure 7 This is a schematic diagram of the straight-line splicing arrangement of sheet piles in the embodiments of this application; Figure 8 This is a schematic diagram of the curved splicing arrangement of sheet piles in the embodiments of this application.

[0023] Explanation of reference numerals in the attached figures: 1. Pile body; 2. Male flange; 3. Female flange; 4. Tenon; 5. Groove; 6. Reinforcing cage; 7. Main reinforcement; 8. Stirrup; 9. End plate; 10. First round hole; 11. Second round hole; 12. Connecting hole; 13. First splicing surface; 14. Second splicing surface; 15. First included angle; 16. Second included angle; 17. Limiting block. Detailed Implementation

[0024] This application mainly adopts a flexible splicing scheme for flanged circular sheet piles, which improves the adaptability of sheet piles to complex riverbanks. The following is a further detailed description of this application.

[0025] Example 1 This application discloses a flanged circular sheet pile.

[0026] Reference Figure 1 and Figure 2The sheet pile consists of a pile body 1, a front flange 2, and a back flange 3. Both the front flange 2 and the back flange 3 are fixedly mounted on the outer wall of the pile body 1. The length directions of both the front flange 2 and the back flange 3 are parallel to the centerline of the pile body 1. The front flange 2 and the back flange 3 are symmetrically arranged along the diameter of the pile body 1. This symmetrical arrangement makes the sheet pile more balanced and stable during splicing and under stress. When the tenon 4 of the front flange 2 on two adjacent pile bodies 1 is inserted into the groove 5 of the adjacent back flange 3, the center of the tenon 4 and the center of the groove 5 coincide, providing a stable axis for the rotation of the front flange 2 and preventing misalignment during splicing. Furthermore, a gap is provided between the first splicing surface 13 of the front flange 2 and the second splicing surface 14 of the back flange 3, allowing the front flange 2 to rotate around its center. This enables the sheet pile to flexibly adjust the splicing angle according to the circumference of the riverbank, solving the problem of insufficient adaptability of traditional sheet piles to complex riverbanks and achieving continuous, seamless retaining walls along the riverbank.

[0027] Specifically, such as Figure 3 and Figure 4 As shown, the center of the tenon 4 coincides with the center of the groove 5 during splicing to ensure rotational stability. The angle between the first splicing surface 13 and the radius extension line of the tenon 4 is an acute angle (e.g., ...). Figure 3 (a) The acute angle ranges from 5° to 8°. This acute angle design, on the one hand, allows the first splicing surface 13 and the parallel second splicing surface 14 to form a closer fit when the yang flange 2 rotates around the center, reducing the risk of leakage at the gap and enhancing the soil retaining and seepage prevention effect; on the other hand, while ensuring a good fit, it does not cause structural displacement at the sheet pile splice due to an excessively large angle, and still provides sufficient angle adjustment margin for the sheet pile. The surface of the first splicing surface 13 is usually smoothed to reduce friction during rotation and make the rotation smoother.

[0028] The groove 5 is a circular structure adapted to the tenon 4, and its center coincides with the center of the tenon 4 during splicing. The depth and diameter of the groove 5 are designed according to the dimensions of the tenon 4 to ensure that the tenon 4 can be tightly inserted. The second splicing surface 14 is parallel to the radial extension line of the groove 5. The line connecting the end of the second splicing surface 14 closest to the groove 5 and the center of the groove 5, and the line connecting the end of the second splicing surface 14 furthest from the groove 5 and the center of the groove 5, form a first included angle 15, the angle range of the first included angle 15 being 5°-8°; the line connecting the end of the second splicing surface 14 furthest from the groove 5 and the center of the groove 5, and the radial extension line of the center of the groove 5, form a second included angle 16, the angle range of the second included angle 16 being 5°-8°. This angle design ensures the symmetry of the processing of the two side walls of the groove 5, so that the second splicing surface 14 of the groove 5 and the first splicing surface 13 of the tenon 4 can be precisely matched. It will not result in excessively loose gaps or excessively tight gaps that prevent rotation due to angle deviations. At the same time, it reduces the gaps at the splicing points and lowers the risk of poor sealing.

[0029] The implementation principle of this embodiment is as follows: When the centers of the two circles coincide, their movement trajectories are centered on the common center. During the rolling process, the arc length traversed by the active circle will completely match the corresponding arc length of the passive circle, without any gaps or misalignments due to relative sliding. The coaxial pure rolling between adjacent sheet piles allows the male and female flanges to rotate smoothly around the common center, ensuring smooth angle adjustment and preventing wear or sealing failure at the joint due to sliding. The radius extension lines of the first splicing surface and the tenon form an acute angle. The acute angle design is to reserve a gap between the first and second splicing surfaces. While ensuring a good fit, the contact between the acute angle surface and the parallel surface will not cause jamming when the male flange rotates around the center. This maintains the flexibility of adjusting the angle of the sheet pile along the riverbank, taking into account both sealing and adaptability.

[0030] Example 2 Example 1 discloses the connection method between adjacent sheet piles. The difference between this example and Example 1 above is that it discloses the load-bearing components of the sheet pile body and the vertical connection method between adjacent sheet piles.

[0031] like Figure 5 As shown, a reinforcing cage 6 is installed inside the pile body 1. The reinforcing cage 6 includes several main bars 7 and stirrups 8. The main bars 7 extend along the length of the pile body 1. The function of the main bars 7 is to directly bear the main tensile and compressive forces generated by the soil pressure and bending moment on the pile body, preventing the pile body 1 from breaking due to stress concentration. The stirrups 8 are spiral hoops that wrap around the main bars 7. The spiral hoops continuously wrap around the main bars 7 to form a spiral structure, which can apply lateral restraint to the main bars 7. Compared with traditional ring hoops 8, it can more evenly restrict the deformation of the main bars 7, while suppressing the lateral deformation of the concrete of the pile body 1 and reducing the risk of cracking.

[0032] like Figure 5 and Figure 6As shown, two end plates 9 are respectively provided on the top and bottom surfaces of the pile body 1. The end plates 9 and several main reinforcement bars 7 are fixedly connected by a snap-fit ​​assembly. The snap-fit ​​assembly includes a first circular hole 10, a second circular hole 11, a connecting hole 12, and a limiting block 17 provided on the main reinforcement bars 7. The connecting hole 12 is used to connect the first circular hole 10 and the second circular hole 11. The diameter of the first circular hole 10 is larger than the diameter of the second circular hole 11. The diameter of the limiting block 17 is larger than the diameter of the main reinforcement bar 7, smaller than the diameter of the first circular hole 10, and larger than the diameter of the second circular hole 11. During installation, simply align the limiting block 17 on the main reinforcement bar 7 with the larger diameter first circular hole 10 on the end plate 9 and insert it. Then, slide it laterally along the connecting hole 12 into the smaller diameter second circular hole 11 to complete the locking. This snap-fit ​​method creates a rigid connection between the end plate 9 and the reinforcing cage 6. On the one hand, it constrains the axial displacement and lateral deformation of the main reinforcement 7, enhancing the overall load-bearing capacity of the reinforcing cage 6 as a skeleton. On the other hand, it provides a flat and uniform connection benchmark for the vertical connection of adjacent sheet piles. Furthermore, adjacent end plates 9 can be fixed by welding, reducing installation errors and improving construction efficiency and connection accuracy.

[0033] The implementation principle of this embodiment is as follows: the reinforcement cage 6 enhances the bending strength and crack resistance of the sheet pile, while the design of the end plate 9 and the snap-fit ​​assembly improves the assembly efficiency and connection accuracy of the sheet pile. Compared with traditional sheet piles, this flanged circular sheet pile has better adaptability and protective performance in riverbank protection projects, effectively improving the overall performance and service life of the retaining wall, and solving the problem of insufficient adaptability of traditional sheet piles to complex riverbanks.

[0034] Reference Figure 7 and Figure 8 The arrangement of flanged circular sheet piles has been specifically applied in riverbank protection engineering. For the measured curved shoreline, multiple sheet piles are driven sequentially during construction: the tenon 4 of the positive flange 2 of the subsequent sheet pile is aligned with the groove 5 of the negative flange 3 of the previous sheet pile, which has already been driven into the soil, and the pile is driven by pressing or vibration. Because the centers of the tenon 4 and the groove 5 coincide and a gap is reserved between the splicing surfaces, the angle of the sheet pile can be finely adjusted in real time during the driving process, so that the connection naturally adapts to the curvature of the riverbank, ultimately forming a continuous and smooth curved transition. After all the sheet piles are spliced, a concentric circular arc rigid spliced ​​retaining wall is formed (e.g., Figure 8 (As shown). This structure has good overall integrity, excellent soil retention and waterproofing effects, is easy to construct, and is also suitable for underwater operation environments, effectively solving the problem of insufficient adaptability of traditional sheet piles to complex riverbanks.

[0035] The complex, continuous curved retaining wall structure is broken down into standardized, prefabricated sheet pile modules. Each module (sheet pile) is industrially produced in a factory, ensuring consistency of specifications and reducing licensing costs. Utilizing the splicing design of Examples 1 and 2, these standard modules can be flexibly assembled into any desired curved shape. This solves the high cost and difficulty issues that may arise from on-site casting or custom production of large curved structures. After the sheet piles are in place, the splicing points are tightly compressed under lateral earth pressure. At the same time, the soil around the sheet piles further restricts their rotation, limiting unnecessary rotation and making the entire curved retaining structure rigid and stable.

[0036] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flanged circular sheet pile, characterized in that, The pile includes a pile body (1), a male flange (2), and a female flange (3). The male flange (2) and the female flange (3) are fixedly installed on the outer wall of the pile body (1). The length direction of the male flange (2) and the length direction of the female flange (3) are parallel to the center line of the pile body (1). The male flange (2) and the female flange (3) are symmetrically arranged along the diameter direction of the pile body (1). When the tenon (4) of the male flange (2) in two adjacent pile bodies (1) is inserted into the groove (5) of the female flange (3), the center of the tenon (4) and the center of the groove (5) coincide. A gap is provided between the first splicing surface (13) of the male flange (2) and the second splicing surface (14) of the female flange (3) so that the male flange (2) can rotate around the center.

2. The flanged circular sheet pile according to claim 1, characterized in that, The angle between the first splicing surface (13) and the radius extension line of the tenon (4) is an acute angle; the second splicing surface (14) is parallel to the radius extension line of the groove (5).

3. The flanged circular sheet pile according to claim 2, characterized in that, The angle between the first splicing surface (13) and the radius extension line of the tenon (4) is in the range of 5°-8°.

4. According to claim 1, the flanged circular sheet pile, the line connecting the end of the second splicing surface (14) near the groove (5) to the center of the groove (5) and the line connecting the end of the second splicing surface (14) away from the groove (5) to the center of the groove (5) form a first included angle (15), the angle range of the first included angle (15) being 5°-8°; the line connecting the end of the second splicing surface (14) away from the groove (5) to the center of the groove (5) and the extended line of the radius of the center of the groove (5) form a second included angle (16), the angle range of the second included angle (16) being 5°-8°; wherein, The radius extension line of the center of the groove (5) is parallel to the second splicing surface (14).

5. The flanged circular sheet pile according to claim 1, characterized in that, It also includes a steel cage (6), which is set inside the pile body (1); the steel cage (6) includes a number of main bars (7) and stirrups (8), the number of main bars (7) extends along the length direction of the pile body (1), and the stirrups (8) are wrapped around the main bars (7).

6. The flanged circular sheet pile according to claim 5, characterized in that, It also includes two end plates (9), which are respectively disposed on the top and bottom surfaces of the pile body (1). The end plates (9) and several main reinforcement bars (7) are fixedly connected by a snap-fit ​​assembly.

7. The flanged circular sheet pile according to claim 6, characterized in that, The snap-fit ​​assembly includes a first circular hole (10), a second circular hole (11), a connecting hole (12) disposed on the end plate (9), and a limiting block (17) disposed on the main rib (7); the connecting hole (12) is used to connect the first circular hole (10) and the second circular hole (11), the diameter of the first circular hole (10) is larger than the diameter of the second circular hole (11), the diameter of the limiting block (17) is larger than the diameter of the main rib (7), the diameter of the limiting block (17) is smaller than the diameter of the first circular hole (10), and the diameter of the limiting block (17) is larger than the diameter of the second circular hole (11). When the main rib (7) is embedded in the first circular hole (10), it is embedded in the second circular hole (11) through the connecting hole (12).

8. The flanged circular sheet pile according to claim 5, characterized in that, The stirrup (8) is a spiral stirrup.

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