An adjustable angle composite pile

Abstract

This application relates to the field of pile foundation engineering in building foundation systems, and more particularly to an adjustable-angle composite pile. It comprises at least two concrete piles, each pile including at least one convex portion and one concave portion; the convex portion of the concrete pile abuts against the concave portion of the adjacent concrete pile; the cross-sectional shape of the convex portion is a circle larger than half a circle, and the cross-sectional shape of the concave portion is a circle less than or equal to half a circle; the diameter of the cross-sectional shape of the convex portion is equal to or smaller than the diameter of the cross-sectional shape of the concave portion. When used in the construction of enclosure structures, this application allows for easy cornering with an adjustable angle, offering advantages such as low cost, short construction time, and low possibility of soil leakage.

Description

Technical Field

[0001] This application relates to the technical field of pile foundation engineering for building foundation systems, and in particular to a composite pile with an adjustable angle. Background Technology

[0002] When constructing large underground buildings, port wharf embankments, and riverbank protection projects, it is necessary to protect the foundations of the buildings themselves or those surrounding them. Precast concrete piles are widely used in building foundation engineering due to their advantages such as reliable pile quality, high bearing capacity, strong adaptability, and fast installation.

[0003] For example, retaining structures are required in the foundation engineering of buildings such as ports and waterways. Therefore, the use of interlocking or splicing concrete piles to form continuous retaining structures has been widely researched and applied. Examples include a method for preparing pre-drilled, spliced ​​retaining piles disclosed in Chinese Patent No. CN101544023B; a prestressed concrete pile and a spliced ​​wall using this pile disclosed in Chinese Patent No. CN106013137B; and an ecological landscape combined revetment disclosed in Patent Application No. CN107366254A. In these technologies, the pile foundations, when connected, can form continuous retaining structures, providing varying degrees of soil retention.

[0004] However, the inventors discovered during actual construction that while the concrete piles used in the aforementioned technologies to form enclosure structures can easily achieve right-angle turns, it is difficult to flexibly adjust the angle of the turn according to the terrain on the construction site. If only right-angle turns are possible during construction and the angle of the enclosure structure cannot be adjusted according to the terrain, more concrete piles and more construction time are often required to build the enclosure structure. In some cases, the enclosure structure may even be impossible to build due to limitations imposed by the terrain and surrounding buildings. Summary of the Invention

[0005] To address the shortcomings of current concrete pile-based enclosure structures, which make it difficult to flexibly adjust the turning angle according to the terrain at the construction site, this application aims to provide an adjustable-angle composite pile. When assembled into an enclosure structure, the turning angle can be easily adjusted according to the terrain at the construction site, with less restriction from terrain and surrounding buildings, thus effectively saving time and cost in constructing the enclosure structure.

[0006] To achieve the objectives of this application, this application provides an adjustable-angle composite pile, employing the following technical solution:

[0007] An adjustable-angle composite pile, characterized in that it comprises at least two concrete pile bodies, each concrete pile body including at least one convex portion and one concave portion; the convex portion of the concrete pile body abuts against the concave portion of the adjacent concrete pile body; the cross-section of the convex portion is a circle larger than half a circle, the cross-section of the concave portion is a circle less than or equal to half a circle, and the diameter of the cross-section of the convex portion is equal to or less than the diameter of the cross-section of the concave portion.

[0008] In the above technical solution, the cross-sectional shape of both the convex and concave parts is circular. When two concrete piles abut against each other through the convex and concave parts, relative rotation between the two concrete piles is easy to occur. When constructing a retaining structure on a construction site with requirements for retaining soil and turning corners, the combined piles in this technical solution can easily achieve turning corners through relative rotation between the convex and concave parts, and the angle of the turning corner is easy to adjust, which can effectively reduce the restrictions imposed by the terrain and surrounding buildings on the construction of the retaining structure.

[0009] The implementation can include any or all of the following features.

[0010] In another embodiment, the protrusion is located at the apex of a corner of the concrete pile, and the recess is located between two adjacent corners of the concrete pile.

[0011] In another embodiment, the recess is located at the apex of the corner of the concrete pile, and the protrusion that abuts against the recess is also located at the apex of the corner of the concrete pile.

[0012] In another embodiment, the circle is formed by a straight line that meets at an angle.

[0013] In another embodiment, the diameters of the cross-sections of the protrusion and the recess are equal.

[0014] The above technical solution maximizes the contact area between the convex and concave parts, reducing the possibility of soil leakage from the rotating connection between the convex and concave parts.

[0015] In another embodiment, when the convex portion and the concave portion abut, there is a clearance between the apex corners of the concrete pile body located on both sides of the convex portion and the apex corners of the concrete pile body located on both sides of the concave portion.

[0016] The existence of clearance facilitates relative rotation between two adjacent concrete piles. Furthermore, the larger the clearance in this technical solution, the greater the range of adjustment of the combined pile's rotation angle, making it easier to meet the rotation angle requirements of enclosure structures in various complex terrains.

[0017] In another embodiment, the apex angle of the concrete pile body located on both sides of the protrusion is greater than or equal to 90° and less than or equal to 180°; the apex angle of the concrete pile body located on both sides of the concave portion is greater than or equal to 90° and less than or equal to 180°.

[0018] By employing the above technical solution, the apex angles on both sides of the convex part and the apex angles on both sides of the concave part are made as far apart as possible, thereby increasing the clearance between the two rotatably connected concrete piles and thus increasing the rotation angle of this composite pile.

[0019] In another embodiment, the concrete pile includes a convex portion and a concave portion, the convex portion and the concave portion being disposed opposite to each other, and the centers of the cross-sections of the convex portion and the concave portion being collinear. The cross-section of the concrete pile located between the convex portion and the concave portion is trapezoidal, and the two vertices of the trapezoid are equal in size.

[0020] The adjustable-angle combined pile in the above technical solution has a simple structure and is easy to manufacture. Furthermore, by optimizing the cross-section of the concrete pile, the overall shape of the concrete pile in this technical solution is square, increasing the pull-out resistance of the concrete pile.

[0021] In another embodiment, the concrete pile is hexagonal, with a protrusion at the apex of each corner and a recess at the midpoint of the connection between two adjacent corners; the outer contour between the adjacent protrusions and recesses on the concrete pile is formed by an angled turn of a plane that connects end to end.

[0022] Through the above technical solution, the angle adjustment range of the combined pile in this application can reach 360° by increasing the angle. Building upon the existing method of adjusting the turning angle by relative rotation of the convex and concave parts, it further possesses a large-range angle adjustment function, allowing the convex part to rotate and connect with different concave parts in the six directions of the corners. This combination of fine-tuning and large-range adjustment functions makes the combined pile more adaptable to various angle adjustment needs during construction, further increasing the convenience of angle adjustment during construction. Furthermore, by optimizing the hexagonal concrete pile shape, the pull-out resistance of the concrete pile can be increased.

[0023] In another embodiment, the concrete pile is hexagonal, with the protrusions at the top of three corners and the concave portions at the top of the other three corners, and the protrusions and concave portions are spaced apart; the outer contour between the adjacent protrusions and concave portions on the concrete pile is formed by an angled turn of a plane that connects end to end.

[0024] The above technical solution provides another implementation method for combined piles that integrate fine-tuning and wide-range adjustment functions. In this implementation method, when the apexes of two adjacent concrete pile corners rotate, the limitation imposed by the hexagonal shape itself is reduced, thereby allowing for a larger clearance and further increasing the adjustable angle range during fine-tuning. Simultaneously, by optimizing the shape of the hexagonal concrete pile, the pull-out resistance of the concrete pile can be increased.

[0025] In another embodiment, the cross-section of the concrete pile is a centrally symmetrical hexagon, the protrusion is the six corners of the hexagon, and the circle of the cross-section of the protrusion is formed by nine straight lines connected end to end at obtuse angles, the obtuse angles formed by the straight lines being 150°, 210°, 150°, 150°, 150°, 150°, 210°, and 150° respectively; the outer contours of adjacent protrusions are connected by a plane, and the angle between the plane and the outer contour of the protrusion connected to it is 210°; the outer contours of adjacent protrusions and the plane connecting the outer contours of adjacent protrusions form the outer contour of the concave portion.

[0026] The above technical solution provides a method for realizing a composite pile with a relatively simple structure, easier demolding during integral casting, and a higher product yield. Furthermore, by optimizing the turning angles of the convex and concave outer contours in the above technical solution, any convex or concave outer contour of this composite pile can form a combination. By selecting different convex and concave parts, a wide range of rotation angle adjustment effects approaching 360° can be achieved. Moreover, due to the optimized turning angles of the convex and concave outer contours, in addition to the combination method where the convex and concave parts are collinear, the convex part can also rotate at multiple angles within the concave part, resulting in a combination where the outer contours of the convex and concave parts are partially fitted together. This allows the composite pile in this technical solution to also have the effect of fine-tuning the rotation angle, while still achieving an effective soil retaining effect, providing users with more choices of rotation angles. Furthermore, the combined parts in this technical solution are in planar contact, which facilitates a more stable combination effect.

[0027] In another embodiment, the recess is provided with an inwardly recessed groove, and a filler is fixed in the groove, the filler filling the space between the protrusion and the recess.

[0028] Because dimensional deviations may occur during the prefabrication of concrete piles, there may be a risk of large gaps and soil leakage when two concrete piles are joined together. Wooden blocks or flexible rubber can be inserted between the convex and concave parts as fillers to seal the gaps. The groove is used to fix the wooden blocks or rubber fillers, which can increase the stability of the fillers.

[0029] In another embodiment, at least two concrete piles are included, each concrete pile having at least one protrusion and one concave portion; the protrusion of the concrete pile abuts against the protrusion of an adjacent concrete pile; the cross-section of the protrusion is circular, and the cross-section of the concave portion is circular, the circle being formed by an angled bend in a straight line connecting end to end.

[0030] In another embodiment, the cross-section of the concrete pile is a centrally symmetrical hexagon, the protrusion is the six corners of the hexagon, and the circle of the cross-section of the protrusion is formed by nine straight lines connected end to end at obtuse angles, the obtuse angles formed by the straight lines being 150°, 210°, 150°, 150°, 150°, 150°, 210°, and 150° respectively; the outer contours of adjacent protrusions are connected by a plane, and the angle between the plane and the outer contour of the protrusion connected to it is 210°; the outer contours of adjacent protrusions and the plane connecting the outer contours of adjacent protrusions form the outer contour of the concave portion.

[0031] By optimizing the turning angles of the convex and concave outer contours in the above technical solution, the range of fine-tuning of the rotation angle during the installation of the combined pile can be expanded, enabling the combined pile to adapt to more working conditions.

[0032] In another embodiment, an adjustable-angle composite pile is characterized by comprising at least two concrete pile bodies, each concrete pile body including at least one convex portion and one concave portion; the convex portion of the concrete pile body abuts against the concave portion of an adjacent concrete pile body; the convex portion having at least two equal interior angles, and the concave portion matching the shape of at least one of the interior angles of the convex portion.

[0033] Through the above technical solution, the concave part can be combined with the three different internal angles of the convex part. When different internal angles are selected, the rotation angle between the concave part and the convex part is different. Therefore, the two concrete piles used for combination can also achieve different rotation angles.

[0034] In summary, this application provides a combined pile with an adjustable angle, which has the following beneficial effects:

[0035] When constructing a retaining structure using the composite piles of this application, it is easy for adjacent concrete piles to turn at an angle, and the angle of this turn can be adjusted. In the current construction of retaining structures on some sites with complex terrain and building environments, the composite piles of this application can meet the turning requirements and the composite surfaces are easy to fit together, minimizing the possibility of soil leakage. This makes the constructed retaining structure more adaptable to the terrain and surrounding buildings, and provides reliable protective performance, reducing the construction time and the amount of concrete piles required. Furthermore, the angle of the composite piles of this application can be adjusted in both fine-tuning and large-range adjustment methods, making it suitable for a wider range of working conditions. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the combined pile in Example 1;

[0037] Figure 2 This is a schematic diagram of the cross-sectional structure of the combined pile in Example 1 at a limit rotation angle;

[0038] Figure 3 This is a schematic diagram of the cross-sectional structure of the combined pile in Example 1 at the middle rotation angle;

[0039] Figure 4 This is a schematic diagram of the cross-sectional structure of the combined pile in Example 1 at another extreme rotation angle;

[0040] Figure 5 This is a schematic diagram of the cross-sectional structure of the combined pile in Example 2;

[0041] Figure 6 This is a schematic diagram of the overall structure of the combined pile in Example 3;

[0042] Figure 7 This is a schematic diagram of the cross-sectional structure of the combined pile in Example 3;

[0043] Figure 8 This is a schematic diagram of the overall structure of the combined pile in Example 4;

[0044] Figure 9 This is a schematic diagram of the cross-sectional structure of the combined pile in Example 4;

[0045] Figure 10 This is a schematic diagram of the cross-sectional structure of the combined pile in the initial combined state in Example 5;

[0046] Figure 11 yes Figure 10 Enlarged structural diagram of section A in the middle;

[0047] Figure 12 This is a cross-sectional schematic diagram of the combined pile in Example 5 rotating counterclockwise at one angle.

[0048] Figure 13This is a cross-sectional schematic diagram of another angle state when the combined pile of Example 5 rotates counterclockwise.

[0049] Figure 14 This is a schematic diagram of the overall structure of the combined pile in Example 6.

[0050] Figure 15 yes Figure 14 A magnified structural diagram of section B.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1. Concrete piles;

[0053] 11. Convex part;

[0054] 111. Interior angle;

[0055] 1111. First interior angle;

[0056] 1112. Second interior angle;

[0057] 1113. Third interior angle;

[0058] 12. Concave;

[0059] 121. Groove;

[0060] 122. Included angle;

[0061] 13. Angle;

[0062] 2. Vertex;

[0063] 3. Clearance. Detailed Implementation

[0064] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] Example 1:

[0066] This embodiment discloses an adjustable-angle combined pile, referring to... Figure 1 The system includes at least two concrete piles 1, which are precast using a single concrete molding process. The length of the concrete pile 1 can be between 12 meters and 30 meters, with 30 meters being preferred, so that the concrete pile 1 can be fixed to the bearing layer during construction in tidal flat geology. The concrete pile 1 can be a solid pile, or in another embodiment, a hollow pile. During precasting, a steel cage can be placed inside the concrete pile 1, and concrete is poured on top of the steel cage, completely enclosing the steel cage within the concrete pile 1.

[0067] Reference Figure 2One side of the concrete pile 1 has an integrally formed protrusion 11, and the opposite side has an integrally formed recess 12. The cross-sectional shape of the protrusion 11 is a circle larger than half a circle, and the cross-sectional shape of the recess 12 is a circle smaller than or equal to half a circle. The centers of the cross-sections of the protrusion 11 and the recess 12 are collinear, and the diameters of the cross-sections of the protrusion 11 and the recess 12 are equal. This allows the outer circumferential surfaces of the protrusion 11 and the recess 12 to easily abut and fit together, enabling the protrusion 11 to be inserted into the recess 12 and rotated. This allows the two concrete piles 1 to rotate relative to each other using the recess 12 and the protrusion 11. The angle of relative rotation between the two concrete piles is the adjustable angle range for the combined pile rotation. The more the cross-section of the protrusion 11 is greater than half a circle, and the more the cross-section of the concave part 12 is less than half a circle, the greater the adjustable angle when the two concrete piles 1 turn. In order to control the strength of the protrusion 11, the cross-section of the protrusion 11 is preferably a circle that is greater than half a circle and less than three-quarters of a circle, and the cross-section of the concave part 12 is preferably a circle that is equal to half a circle.

[0068] Reference Figure 2 One side of the concrete pile 1 with a protrusion 11 protrudes outward, forming an angle 13, with the protrusion 11 located at the apex of the angle 13. Another side of the concrete pile 1 with a recess 12 protrudes outward, forming another angle 13, with the recess 12 located at the apex of the angle 13. The upper and lower sides of the concrete pile 1 are flat, making the cross-section of the upper and lower sides of the concrete pile 1 trapezoidal, which increases the pull-out resistance of the concrete pile 1. The two apex angles 2 of the trapezoid can be equal, and the angle of the apex angle 2 can be between 90° and 180°, preferably between 120° and 150°, and more preferably 120°. The apex angles 2 create a certain space between the two apex angles 2 of two adjacent concrete piles 1 that are close to each other, forming a clearance gap 3, so that the two rotatably connected concrete piles 1 can rotate relative to each other. The larger the angle of the apex angles 2 of two adjacent concrete piles 1 that are close to each other, the larger the clearance gap 3 can be, thus making the angle adjustment range of this composite pile larger.

[0069] The implementation principle of an adjustable-angle combined pile in this embodiment is as follows: Figure 2 and Figure 4 The diagram shows two limit angles at which one concrete pile 1 rotates relative to another concrete pile 1. When the end of the concave portion 12 and the end of the convex portion 11 abut, the composite pile can no longer rotate. Figure 3This illustrates an adjustment angle between two extreme rotation angles. Within this range, the construction worker can arbitrarily adjust the relative rotation angle between the two concrete piles 1 according to actual needs, thereby changing the relative position of the two concrete piles 1 and completing the corner construction of the enclosure structure.

[0070] During construction, the first concrete pile 1 is driven into the bearing layer and fixed. Then, before driving in the next concrete pile 1, the protrusions 11 and concave parts 12 of the two piles are rotatably connected and rotated to the desired position before being driven into the bearing layer and fixed, forming a corner connection. Multiple concrete piles 1 are driven in sequence using this method to form a retaining structure with a corner. Because the outer circumferences of the protrusions 11 and concave parts 12 of the two rotatably connected concrete piles 1 in this embodiment have a high degree of fit, the possibility of soil leakage at the connection points of the constructed retaining structure is relatively small, resulting in high reliability of the retaining structure.

[0071] Example 2:

[0072] This embodiment discloses an adjustable-angle combined pile, referring to... Figure 5 The only difference between this embodiment and Embodiment 1 is that the upper side of the concrete pile 1 is a curved surface, and the lower side of the concrete pile 1 is a curved surface symmetrical to the upper side, making the cross-sections of the upper and lower ends of the concrete pile 1 a trapezoid with a curved upper base. In this case, the apex is formed by the connection of the curved surface and the plane, and the apex is no longer 120°, but still close to a 120° obtuse angle. This embodiment's combined pile can increase the contact area between the concrete pile 1 and the bearing soil layer without occupying the clearance gap 3, further enhancing the pull-out resistance of the concrete pile 1.

[0073] Example 3:

[0074] This embodiment discloses an adjustable-angle combined pile, referring to... Figure 6 and Figure 7 It includes at least two concrete piles 1. The cross-section of the concrete pile 1 is a hexagon with six protruding corners 13. A protrusion 11 is integrally formed at the apex of each corner 13, and a recess 12 is integrally formed at the midpoint of every two adjacent corners 13. The cross-section of the concrete pile 1 is a centrally symmetrical figure.

[0075] Reference Figure 7 The cross-sectional shape of the protrusion 11 is a circle larger than one-half a circle and smaller than three-quarters a circle, and the cross-sectional shape of the concave part 12 is a circle smaller than or equal to one-half a circle. The diameter of the cross-section of the protrusion 11 and the diameter of the cross-section of the concave part 12 are equal, so that the protrusion 11 can be inserted into the concave part 12, and the outer peripheral surfaces of the protrusion 11 and the concave part 12 can easily fit together while achieving a rotatable connection.

[0076] Referring to 7, the outer contours of the adjacent protrusions 11 and concave sections 12 of a concrete pile 1 are connected by four end-to-end planes that bend at a certain angle, forming apex angles 2 on both sides of the protrusion 11 and the concave sections 12. The angles of the apex angles 2 of the concrete piles 1 on both sides of the protrusion 11 can be between 90° and 180°, and the angles of the apex angles 2 of the concrete piles 1 on both sides of the concave section 12 can also be between 90° and 180°. This allows for a clearance gap 3 between the two apex angles 2 that are close to each other when the two rotatably connected concrete piles 1 are connected, making it easier for the two rotatably connected concrete piles 1 to rotate relative to each other. The angle of the apex 2 of the concrete pile 1 located on both sides of the protrusion 11 is preferably between 120° and 150°, and more preferably 150°. The angle of the apex 2 of the concrete pile 1 located on both sides of the concave part 12 is preferably between 120° and 150°, and more preferably 150°. Therefore, from the plane connected to the protrusion 11 to the plane connected to the concave part 12, an inner angle 111 is formed between two adjacent connected planes. The angle of the inner angle 111 is preferably 150°, 210° and 150° from the protrusion 11 to the concave part 12. This outer contour setting of the concrete pile in this embodiment can make the clearance 3 between the two concrete piles 1 that are combined with each other more sufficient, and can also greatly enhance the pull-out resistance of the concrete pile 1.

[0077] Reference Figure 6 The concrete pile 1 is precast using a single-piece concrete molding process. Its length can range from 12 meters to 30 meters, with 30 meters being preferred, to ensure it can be fixed to the bearing layer during construction in tidal flat geological conditions. The outer contour of the concrete pile 1 can be a hexagonal polyhedron from top to bottom. In another embodiment, two-thirds of the outer contour of the concrete pile 1 can be a hexagonal polyhedron, while the remaining one-third can be a cylinder or a square prism, thus saving materials and costs. The concrete pile 1 can be a hollow pile, or in another embodiment, a solid pile. During precasting, a steel cage can be placed inside the concrete pile 1, and concrete is poured onto the steel cage, completely enclosing it within the concrete pile 1.

[0078] The implementation principle of the adjustable-angle combined pile in this embodiment is as follows: The combined pile in this embodiment has two angle adjustment methods: a large-range angle adjustment and a small-range angle fine-tuning. When a protrusion 11 of one concrete pile 1 is combined with a different concave part 12 of another concrete pile 1, the angle adjustment range between the two concrete piles 1 is relatively large, which can meet the needs of large-range adjustment of the corner angle of the enclosure structure during actual construction. When the protrusion 11 of one concrete pile 1 is combined with the concave part 12 of another concrete pile 1, relative rotation can occur between the two concrete piles 1 within the clearance gap 3. This rotation range is the range within which the corner angle of the combined pile can be finely adjusted, which can meet the needs of fine-tuning the corner angle after a large-range adjustment of the corner angle of the enclosure structure during actual construction. This angle adjustment function of the combined pile in this embodiment, which combines large-range adjustment and fine-tuning of the corner angle, enables it to form a corner combination within a range of nearly 360°, which can meet the various corner construction needs of the enclosure structure.

[0079] Example 4:

[0080] This embodiment discloses an adjustable-angle combined pile. The only difference between this embodiment and Embodiment 3 is that: (Refer to...) Figure 8 and Figure 9 The system includes at least two concrete piles 1, each of which is a hexagon with six protruding corners 13. Three of the corners 13 have a protrusion 11 integrally formed at their apex, and the other three corners 13 have a concave portion 12 integrally formed at their apex. The protrusions 11 and concave portions 12 are spaced apart. The outer contours of adjacent protrusions 11 and concave portions 12 are connected by nine intersecting planes at obtuse angles. An interior angle 111 is formed between two adjacent connecting planes. The angle of this interior angle 111 is preferably 150°, 210°, 150°, 210°, 210°, 150°, 210°, and 150° sequentially from the protrusion 11 to the concave portion 12.

[0081] This embodiment of an adjustable-angle composite pile also features two angle adjustment methods: a wide-range angle adjustment and a small-range fine-tuning. When different protrusions 11 of one concrete pile 1 are combined with different concave portions 12 of another concrete pile 1, a wide-range angle adjustment of the composite pile can be achieved. When the protrusions 11 of one concrete pile 1 and the concave portions 12 of another concrete pile 1 are combined, relative rotation can occur between the two concrete piles 1 within the clearance gap 3. This rotation range is the fine-tuning range of the composite pile's rotation angle. Therefore, the composite pile of this embodiment can form a rotation combination within a range approaching 360°, easily meeting the requirements of various construction conditions for enclosure structures.

[0082] Example 5:

[0083] This embodiment discloses an adjustable-angle combined pile, referring to... Figure 10 It includes at least two concrete piles 1. The concrete pile 1 is a centrally symmetrical hexagon, and the six protruding corners are the protrusions 11 used for assembly. The adjacent protrusions 11 on each concrete pile 1 are connected to form a concave portion 12.

[0084] Reference Figure 11 The outer contour of the convex part 11 is a polyhedron formed by nine planes that meet end to end at obtuse angles. An interior angle 111 is formed between two adjacent planes. The angles of the interior angles 111 of the outer contour of the convex part 11 are 150°, 210°, 150°, 150°, 150°, 150°, 210°, and 150° in a clockwise direction. The outer contour of the convex part 11 also forms part of the outer contour of the concave part 12. The lowest point of the outer contour of the concave part 12 connects two adjacent convex parts 11 through a plane at a certain angle 122. The angle 122 formed by the lowest point of the outer contour of the concave part 12 and the outer contour of the convex part 11 is 150°.

[0085] Reference Figure 11 Furthermore, a groove 121 is integrally formed at the lowest point of the outer contour of the recess 12. The cross-section of the groove 121 is an isosceles trapezoid that is recessed inward along the lowest point of the outer contour of the recess 12. When two concrete piles 1 are combined, the groove 121 is used to fix fillers such as rubber pads or wooden blocks (not shown in the figure) to fill the gaps that may appear due to dimensional deviations after the protrusions 11 and recesses 12 of the two concrete piles 1 are joined, thereby reducing the possibility of soil leakage between the combined piles. The shape of the filler is prefabricated according to the shape matching the outer contour of the protrusions 11 and recesses 12 of the concrete piles 1. When the selected filler is flexible, the filler can be embedded into the groove 121 after the concrete piles 1 are demolded, and can be fixed with glue or screws. During on-site construction, the filler pre-fixed in the groove 121 is driven into the bearing layer together with the concrete piles 1 for fixation. When the selected filler is a rigid material, the filler can be fixed in the groove 121 after the concrete pile 1 is demolded, or the filler can be inserted into the groove 121 of the joint of the two concrete piles 1 after the two adjacent concrete piles are combined and driven into the bearing layer for fixation, and then driven into the bearing layer for fixation.

[0086] Reference Figure 10The concrete pile 1 is precast in one piece using concrete molding, and its length can range from 12 meters to 30 meters, with 30 meters being preferred, so that the concrete pile 1 can be fixed to the bearing layer during construction in tidal flat geology. The concrete pile 1 can be a centrally symmetrical hexagonal polyhedron from top to bottom, as described above. In another embodiment, the outer contour of the concrete pile 1 can be half a centrally symmetrical hexagonal polyhedron and half a cylinder or square prism, to save materials and reduce costs. The concrete pile 1 can be a hollow pile, or in another embodiment, a solid pile. A steel cage can be placed inside the concrete pile 1 during precasting.

[0087] The implementation principle of an adjustable-angle combined pile in this embodiment is as follows: Figure 10 As shown, any protrusion 11 of one concrete pile 1 is combined with any concave portion 12 of another concrete pile 1, with the central axes of the protrusion 11 and concave portion 12 collinear, as the initial assembly state. Figure 12 and Figure 13 As shown, one concrete pile 1 rotates counterclockwise around the outer periphery of another concrete pile 1, allowing adjustment of the combined pile's rotation angle. When the protrusion 11 is paired with different concave parts 12, a wide range of rotation angle adjustments can be achieved. Within the concave part 12, rotating the protrusion 11 counterclockwise to the right or clockwise to the left allows for fine-tuning of the combined pile's rotation angle. This embodiment's wide-range adjustment and fine-tuning angle adjustment functions easily meet various requirements for the rotation angle of the enclosure structure during actual construction. Furthermore, because the outer contours of the protrusion 11 and the concave part 12 match, the joint of the protrusion 11 and the concave part 12 forms a good fit, reducing the possibility of soil leakage after the combined pile is assembled. The groove 121 and the filling material further reduce the possibility of soil leakage after the combined pile is assembled, enhancing the reliability of the enclosure structure constructed using this combined pile.

[0088] Example 6:

[0089] This embodiment discloses an adjustable-angle combined pile, referring to... Figure 14 and Figure 15The only difference between this embodiment and Embodiment 1 is that the cross-sectional shape of the protrusion 11 is a portion of a regular hexagon. For example, the cross-section of the protrusion 11 is composed of the four sides of a regular hexagon, giving the protrusion 11 three equal interior angles 111, which are, in a clockwise direction, the first interior angle 1111, the second interior angle 1112, and the third interior angle 1113. The angles of the first interior angle 1111, the second interior angle 1112, and the third interior angle 1113 are all 120°. The cross-sectional shape of the recess 12 is also a portion of a regular hexagon. In order for the recess 12 to be able to form combinations with interior angles 111 in different directions to achieve the effect of a corner combination of two concrete piles 1, the number of sides of the polygon occupied by the outer contour of the protrusion 11 should be greater than the number of sides of the polygon occupied by the outer contour of the recess 12. For example, the cross-section of the recess 12 is composed of two sides of a regular hexagon. The side length of the regular hexagon of the concave portion 12 is equal to the side length of the regular hexagon of the convex portion 11, so that the concave portion 12 can be combined with the shape of any one of the interior angles 1111, 1112, and 1113 of the convex portion 11. In another embodiment, the side length of the regular hexagon of the concave portion 12 may also be smaller than the side length of the regular hexagon of the convex portion 11.

[0090] Of course, in some other embodiments, the cross-sectional shapes of the convex portion 11 and the concave portion 12 are not limited to a portion of a regular hexagon; they can also be a portion of a regular polygon with n ≥ 5 sides, but the number of sides n of the regular polygons of the convex portion 11 and the concave portion 12 should be equal. For example, the cross-section of the convex portion 11 is composed of three sides of a regular pentagon, giving the convex portion two equal interior angles 111, which are, in a clockwise direction, the first interior angle 1111 and the second interior angle 1112. The angles of the first interior angle 1111 and the second interior angle 1112 are both 108°. The cross-sectional shape of the concave portion 12 is also a portion of a regular pentagon; for example, the cross-section of the concave portion 12 is composed of two sides of a regular pentagon, and the side length of the regular pentagon of the concave portion 12 is equal to the side length of the regular pentagon of the convex portion 11. The implementation principle of an adjustable angle combined pile in this embodiment is as follows: When the concave part 12 of one concrete pile 1 is combined with the convex part 11 of another concrete pile 1, the concave part 12 matches the shape of at least one inner angle 111 of the convex part 11, so that the concave part 12 can be combined outside the inner angle 111 in different directions of the convex part 11, thereby allowing the two concrete piles 1 to be combined to produce a variety of different combination angles, which makes it convenient for the construction workers to combine corner enclosure structures according to actual construction needs.

[0091] 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 in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An angle-adjustable composite pile, characterized by, At least two concrete piles, each of which comprises a convex part and a concave part; the convex part of one concrete pile abuts against the concave part of the adjacent concrete pile; The cross section of the convex part is a circle larger than a semicircle, and the cross section of the concave part is a circle equal to or smaller than a semicircle; The diameter of the cross section of the convex part is equal to or smaller than the diameter of the cross section of the concave part; The concrete pile is hexagonal, the convex part is located at the top of a corner of the concrete pile, and the concave part is located between two adjacent corners of the concrete pile; the outer contour between the convex part and the concave part arranged adjacently on the concrete pile is formed by an angle turn of planes connected end to end; The circle of the convex part is formed by an obtuse angle turn of nine straight lines connected end to end, the outer contour of the concave part is formed by the outer contour of the adjacent convex part and the planes connecting the outer contour of the adjacent convex part, and the convex part rotates in the concave part.

2. An angle adjustable composite pile according to claim 1, wherein, The convex part is located at the top of each corner of the hexagonal concrete pile, and the concave part is located at the middle of the connecting part between two adjacent corners.

3. An angle-adjustable composite pile, characterized by, At least two concrete piles, each of which comprises a convex part and a concave part; the convex part of one concrete pile abuts against the concave part of the adjacent concrete pile; The cross section of the convex part is a circle larger than a semicircle, and the cross section of the concave part is a circle equal to or smaller than a semicircle; The diameter of the cross section of the convex part is equal to or smaller than the diameter of the cross section of the concave part; The concrete pile is hexagonal, the concave part is located at the top of a corner of the concrete pile, and the convex part abutting against the concave part is located at the top of a corner of the concrete pile; the outer contour between the convex part and the concave part arranged adjacently on the concrete pile is formed by an angle turn of planes connected end to end; The circle of the convex part is formed by an obtuse angle turn of nine straight lines connected end to end, the outer contour of the concave part is formed by the outer contour of the adjacent convex part and the planes connecting the outer contour of the adjacent convex part, and the convex part rotates in the concave part.

4. An angle adjustable composite pile according to claim 3, wherein, The convex part is located at the top of three corners of the hexagonal concrete pile, the concave part is located at the top of the other three corners, and the convex part and the concave part are arranged alternately.

5. The angle-adjustable composite pile according to claim 1 or 3, characterized in that, The diameters of the cross sections of the convex part and the concave part are equal.

6. An angle adjustable composite pile according to claim 1 or 3, wherein When the convex part abuts against the concave part, there is a clearance between the top corners of the concrete piles on both sides of the convex part and the top corners of the concrete piles on both sides of the concave part.

7. An angle adjustable composite pile according to claim 4, wherein The top corners of the concrete piles on both sides of the convex part are greater than 90° and equal to or smaller than 180°, and the top corners of the concrete piles on both sides of the concave part are greater than 90° and equal to or smaller than 180°.

8. An angle adjustable composite pile according to claim 1 or 3, wherein, The obtuse angles formed by the straight line turn of the convex part are 150°, 210°, 150°, 150°, 150°, 150°, 210° and 150° in sequence, and the outer contour of the adjacent convex part is connected by a plane, and the included angle between the plane and the outer contour of the convex part connected therewith is 210°.

9. An angle adjustable composite pile according to claim 8, wherein, The recess is provided with an inwardly recessed notch, and a filler is fixed in the notch and fills between the convex part and the recess.

10. An angle-adjustable composite pile, characterized by comprising: At least two concrete pile bodies are included, and each of the concrete pile bodies includes at least one convex part and one recess; The convex part of the concrete pile body abuts against the convex part of an adjacent concrete pile body; The cross section of the convex part is circular, and the cross section of the recess is circular, The circular shape is formed by angularly turning first and last straight lines; The cross section of the concrete pile body is a central-symmetrical hexagon, the convex part is one of the six angles of the hexagon, the circular cross section of the convex part is formed by angularly turning nine first and last straight lines at obtuse angles, and the obtuse angles formed by angularly turning the straight lines are 150°, 210°, 150°, 150°, 150°, 150°, 210° and 150° in sequence; The outer contours of adjacent convex parts are connected by a plane, and the included angle between the plane and the outer contour of the convex part connected therewith is 210°; The outer contours of adjacent convex parts and the plane connecting the outer contours of adjacent convex parts form the outer contour of the recess.

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