Lock catch structure and foundation pile

Abstract

The utility model provides a lock catch structure and a foundation pile, and relates to the technical field of foundation piles, the lock catch structure comprises: a connecting plate having a first side wall surface and a second side wall surface which are oppositely arranged; the lock catch part is connected with the first side wall surface; each supporting leg is provided with a first end and a second end which are oppositely arranged, the first ends are connected with the second side wall surface, and each supporting leg is provided with a third side wall surface and a fourth side wall surface which are oppositely arranged; the third side wall face and the second side wall face are connected through a first arc transition face, and the distance between the two supporting feet is gradually increased from the first end to the second end. According to the technical scheme, the connecting plate is not directly connected with the outer wall face of the foundation pile body, but is connected with the outer wall face of the foundation pile body through the two supporting feet. On the first hand, the supporting feet and the connecting plates are not prone to deformation in the welding process, foundation pile bodies of various shapes and various radians can be adapted, and the application range is wider; and on the second aspect, after welding is completed, the connecting strength between the lock catch structure and the foundation pile body is higher, and the safety performance is better improved.

Description

Technical Field

[0001] This utility model relates to the field of foundation pile technology, and more specifically, to a locking structure and a foundation pile. Background Technology

[0002] In related technologies, the locking structure is directly connected to the outer wall of the steel pipe pile via one side of the connecting plate. During the welding process between one side of the connecting plate and the outer wall of the steel pipe pile, the connecting plate is prone to deformation, and the connection strength between the two after welding is not high. Utility Model Content

[0003] In order to solve or improve at least one of the above-mentioned technical problems, one object of this utility model is to provide a locking structure.

[0004] Another objective of this utility model is to provide a foundation pile having the above-mentioned locking structure.

[0005] To achieve the above objectives, the first aspect of this utility model provides a locking structure, including a connecting plate, a locking part, and two legs. The connecting plate has a first side wall and a second side wall disposed opposite to each other. The locking part is connected to the first side wall. The legs have a first end and a second end disposed opposite to each other; the first end is connected to the second side wall, and the second end is used to connect to the outer wall of the pile body. The legs also have a third side wall and a fourth side wall disposed opposite to each other; the first end is located at one end of the third and fourth side walls, and the second end is located at the other end of the third and fourth side walls. The third side wall and the second side wall are connected by a first arc transition surface. The distance between the two legs gradually increases from the first end to the second end.

[0006] This utility model aims to provide a locking structure, with the locking part located on one side of the connecting plate and two support legs on the other side. The connecting plate is not directly connected to the outer wall of the pile body, but rather connected to the outer wall of the pile body through the two support legs. This design has two advantages: first, the support legs and connecting plate are less prone to deformation during welding, allowing it to adapt to pile bodies of various shapes and curvatures, thus broadening its applicability; second, the connection strength between the locking structure and the pile body is higher after welding, which helps improve safety performance.

[0007] It is important to emphasize that the distance between the two legs gradually increases from the first end to the second end. The end of each leg furthest from the connecting plate (i.e., the second end) has a contact surface with the outer wall of the pile body. This design maximizes the distance between the two contact surfaces, which helps improve the connection stability after welding and ensures that the locking structure can adapt to pile bodies of various shapes and curvatures, thereby expanding the scope of application.

[0008] In addition, the above-mentioned technical solution provided by this utility model may also have the following additional technical features:

[0009] In the above technical solution, optionally, the included angle between the support leg and the connecting plate is the first included angle, which is 5 degrees to 10 degrees.

[0010] In this technical solution, this design method can ensure that the distance between the two legs gradually increases from the first end to the second end, and the distance between the two second ends is not too large. This can improve the connection stability after welding and expand the application range of the locking structure.

[0011] In the above technical solution, optionally, the second sidewall includes a second smooth segment, the third sidewall is connected to the second smooth segment through a first arc transition surface, the area of ​​the third sidewall is a first value, the area of ​​the second smooth segment is a second value, and the first value is 2 to 2.3 times the second value.

[0012] In this technical solution, this design method can ensure that the distance between the two legs (including the maximum and minimum distances) is neither too large nor too small, and can also ensure that the distance between the connecting plate and the outer wall of the pile body is neither too large nor too small, thereby improving the connection stability between the locking structure and the pile.

[0013] Optionally, in the above technical solution, the end face of the second end is connected to the fourth side wall by a chamfered surface.

[0014] In this technical solution, by setting a chamfered surface, it is convenient for workers to weld the second end of the support leg and the outer wall of the pile body, which helps to ensure the connection strength between the support leg and the pile body.

[0015] In the above technical solution, optionally, the area of ​​the end face of the second end is a third value, the area of ​​the chamfered surface is a fourth value, and the third value is 1 to 1.1 times the fourth value.

[0016] In this technical solution, the size of the second end face is neither too large nor too small, and the size of the chamfer is neither too large nor too small. This ensures the connection strength between the support leg and the pile body (there is a sufficiently large contact area between the support leg and the pile body), and also facilitates the welding of the second end of the support leg and the outer wall of the pile body by the workers.

[0017] In the above technical solution, optionally, the locking part includes two bent parts. One end of the bent part is connected to the first side wall, and the other ends of the two bent parts are bent in a direction that brings them closer to each other. The two bent parts and the connecting plate form a groove.

[0018] In this technical solution, when the locking part has a groove structure, the locking part includes two bent parts, and the two bent parts and the connecting plate surround the groove. The locking part of the other foundation pile has a protruding structure.

[0019] The groove structure and the protrusion structure work together to connect two adjacent foundation piles.

[0020] In the above technical solution, optionally, the bent portion has a fifth side wall and a sixth side wall that are arranged opposite to each other, and the fifth side wall is connected to the first side wall through a second arc transition surface.

[0021] In this technical solution, the fifth side wall and the first side wall adopt a smooth transition. This design effectively avoids stress concentration and helps ensure the connection strength between the bending part and the connecting plate.

[0022] In the above technical solution, optionally, the end face of the bent part away from the connecting plate is a third arc transition surface, which is used to connect the fifth side wall and the sixth side wall.

[0023] In this technical solution, by setting a third arc transition surface, it can play a guiding role to a certain extent, so that the protruding structure of another foundation pile can smoothly enter the groove, thereby realizing the mutual connection of two adjacent foundation piles.

[0024] In the above technical solution, optionally, the locking part includes a limiting protrusion. One end of the limiting protrusion is connected to the first side wall surface, and the limiting protrusion has a seventh side wall surface and an eighth side wall surface disposed opposite to each other. The seventh side wall surface is connected to the first side wall surface through a fourth arc transition surface. The eighth side wall surface is connected to the first side wall surface through a fifth arc transition surface.

[0025] In this technical solution, when the locking part is a protruding structure, the locking part includes a limiting protrusion. The locking part of the other pile is a groove structure. The mutual cooperation between the groove structure and the protruding structure achieves the interconnection of two adjacent piles.

[0026] By setting a fourth circular arc transition surface, stress concentration can be effectively avoided, which helps to ensure the connection strength between the limiting protrusion and the connecting plate.

[0027] By setting a fifth circular arc transition surface, stress concentration can be effectively avoided, which helps to ensure the connection strength between the limiting protrusion and the connecting plate.

[0028] The second aspect of this utility model provides a foundation pile, including a foundation pile body and a locking structure as described in any of the above technical solutions, wherein the second end of the support leg of the locking structure is connected to the outer wall surface of the foundation pile body.

[0029] Since the foundation pile includes any of the locking structures mentioned in the first aspect above, it has the beneficial effects of any of the above technical solutions, which will not be elaborated here.

[0030] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned by practice of the present invention. Attached Figure Description

[0031] Figure 1 A schematic diagram of a locking structure according to an embodiment of the present invention is shown;

[0032] Figure 2 A schematic diagram of a locking structure according to another embodiment of the present invention is shown;

[0033] Figure 3 A schematic diagram of a foundation pile according to an embodiment of the present invention is shown;

[0034] Figure 4 A schematic diagram of a foundation pile according to another embodiment of the present invention is shown;

[0035] Figure 5 A schematic diagram of a foundation pile according to another embodiment of the present invention is shown;

[0036] Figure 6 A schematic diagram of a foundation pile according to another embodiment of the present invention is shown.

[0037] in, Figures 1 to 6 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0038] 100: Locking structure; 110: Connecting plate; 111: First side wall; 112: Second side wall; 1121: Second smooth section; 120: Locking part; 121: Bending part; 1211: Fifth side wall; 1212: Sixth side wall; 1213: Third arc transition surface; 122: Groove; 123: Limiting protrusion; 1231: Seventh side wall; 1232: Eighth side wall; 130: Support leg; 131: First end; 132: Second end; 133: Third side wall; 134: Fourth side wall; 141: First arc transition surface; 142: Second arc transition surface; 143: Chamfered surface; 144: Fourth arc transition surface; 145: Fifth arc transition surface; 200: Foundation pile; 210: Foundation pile body; a: First direction; b: Second direction. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, embodiments of the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] The following reference Figures 1 to 6 The present invention describes a locking structure 100 and a foundation pile 200 provided according to some embodiments of the present invention.

[0042] In one embodiment according to the present invention, such as Figure 1 and Figure 2 As shown, the locking structure 100 includes a connecting plate 110, a locking part 120, and two support legs 130. The connecting plate 110 is a plate-shaped structure, and for the locking part 120 and the support legs 130, the connecting plate 110 mainly serves to install the carrier.

[0043] The connecting plate 110 has a first side wall 111 and a second side wall 112 disposed opposite to each other. The locking part 120 is connected to the first side wall 111. Both legs 130 are connected to the second side wall 112.

[0044] In other words, the connecting plate 110 has a first side and a second side disposed opposite to each other, wherein the first side of the connecting plate 110 has a first side wall 111; and the second side of the connecting plate 110 has a second side wall 112. A locking part 120 is provided on the first side of the connecting plate 110 and is connected to the first side wall 111. Two support legs 130 are both provided on the second side of the connecting plate 110 and are connected to the second side wall 112.

[0045] Optionally, the locking part 120 and the connecting plate 110 are an integral structure, which has better mechanical properties and higher connection strength compared with post-processing (such as welding), which helps to reduce the number of parts and improve assembly efficiency.

[0046] It should be noted that the locking structure 100 of this utility model can be understood as an interlock pipe pile, used to connect with the foundation pile 200. Specifically, the two legs 130 of the locking structure 100 are connected to the outer wall surface of the foundation pile body 210.

[0047] Optionally, the locking part 120 is a groove structure or a protrusion structure. The locking structure 100 (groove structure) of one foundation pile 200 can cooperate with the locking structure 100 (protrusion structure) of another foundation pile 200. The locking structures 100 of two adjacent foundation piles 200 cooperate with each other to realize the interconnection of the two adjacent foundation piles 200.

[0048] The support leg 130 has a first end 131 and a second end 132 arranged opposite to each other. The first end 131 is connected to the second side wall 112, and the second end 132 is used to connect to the outer wall of the pile body 210. It should be noted that the pile body 210 is part of the pile 200. The pile 200 is a steel pipe pile or a steel sheet pile, flexibly configured according to the actual application scenario. The pile body 210 is a steel pipe or a steel sheet.

[0049] Optionally, the support leg 130 and the connecting plate 110 are an integral structure, which has better mechanical properties and higher connection strength compared to post-processing (such as welding), and helps to reduce the number of parts and improve assembly efficiency.

[0050] The support leg 130 also has a third side wall 133 and a fourth side wall 134 arranged opposite to each other, with a first end 131 located at one end of the third side wall 133 and the fourth side wall 134, and a second end 132 located at the other end of the third side wall 133 and the fourth side wall 134.

[0051] It should be noted that the side of the two legs 130 that is closer to each other is the inner side, and the side that is farther apart from each other is the outer side. The third side wall 133 is the inner wall of the leg 130; the fourth side wall 134 is the outer wall of the leg 130.

[0052] The third side wall 133 is connected to the second side wall 112 via a first arc transition surface 141. In other words, the third side wall 133 and the second side wall 112 have a smooth transition. This design effectively avoids stress concentration and helps ensure the connection strength between the support leg 130 and the connecting plate 110.

[0053] The distance between the two legs 130 gradually increases from the first end 131 to the second end 132.

[0054] This utility model aims to provide a locking structure 100, with a locking part 120 located on one side of a connecting plate 110 and two support legs 130 located on the other side of the connecting plate 110. The connecting plate 110 is not directly connected to the outer wall of the pile body 210, but is connected to the outer wall of the pile body 210 through the two support legs 130. This design has two advantages: first, the support legs 130 and the connecting plate 110 are less prone to deformation during welding, allowing it to adapt to pile bodies 210 of various shapes and curvatures, thus broadening its applicability; second, the connection strength between the locking structure 100 and the pile body 210 is higher after welding, which helps improve safety performance.

[0055] It should be emphasized that the distance between the two legs 130 gradually increases from the first end 131 to the second end 132. The end of each leg 130 away from the connecting plate 110 (i.e., the second end 132) has a contact surface with the outer wall of the pile body 210. This design can maximize the distance between the two contact surfaces, which is beneficial to improving the connection stability after welding and ensuring that the locking structure 100 can adapt to pile bodies 210 of various shapes and curvatures, thereby expanding the scope of application.

[0056] In some embodiments, optionally, such as Figure 1 As shown, the included angle between the support leg 130 and the connecting plate 110 is the first included angle β, which is 5 to 10 degrees.

[0057] This design ensures that the distance between the two legs 130 gradually increases from the first end 131 to the second end 132, and the distance between the two second ends 132 is not too large. This not only improves the connection stability after welding, but also expands the applicability of the locking structure 100.

[0058] In one specific embodiment, the included angle between the third side wall 133 and the end face of the second end 132 is 82 degrees, that is, the first included angle (the included angle between the support leg 130 and the connecting plate 110) is 8 degrees.

[0059] It should be noted that the included angle between the third side wall 133 and the end face of the second end 132 is complementary to the first included angle, that is, the sum of the two included angles is 90 degrees.

[0060] In some embodiments, the second sidewall 112 may optionally include a second smooth segment 1121, and the third sidewall 133 is connected to the second smooth segment 1121 via a first arc transition surface 141.

[0061] The area of ​​the third sidewall 133 is the first value, and the area of ​​the second smooth segment 1121 is the second value. The first value is 2 to 2.3 times the second value.

[0062] This design ensures that the distance between the two legs 130 (including the maximum and minimum distances) is neither too large nor too small, and also ensures that the distance between the connecting plate 110 and the outer wall of the pile body 210 is neither too large nor too small, thereby improving the connection stability between the locking structure 100 and the pile 200.

[0063] In one specific embodiment, the length of the second smooth segment 1121 is 16 mm. The length of the third sidewall 133 is 35 mm.

[0064] Optionally, the radius corresponding to the first circular arc transition surface 141 is 9 mm to 11 mm.

[0065] In one specific embodiment, the radius of the first arc transition surface 141 is 10 mm.

[0066] In some embodiments, the end face of the second end 132 is optionally connected to the fourth sidewall 134 via a chamfered surface 143.

[0067] By setting the chamfered surface 143, it is convenient for workers to weld the second end 132 of the support leg 130 and the outer wall of the pile body 210, which helps to ensure the connection strength between the support leg 130 and the pile body 210.

[0068] Optionally, the second end 132 of the fourth sidewall 134 is chamfered.

[0069] In some embodiments, the area of ​​the end face of the second end 132 is optionally a third value, and the area of ​​the chamfered surface 143 is a fourth value, wherein the third value is 1 to 1.1 times the fourth value.

[0070] This design ensures that the size of the end face of the second end 132 is neither too large nor too small, and the size of the chamfered surface 143 is neither too large nor too small. This not only ensures the connection strength between the support leg 130 and the pile body 210 (there is a sufficiently large contact area between the support leg 130 and the pile body 210), but also facilitates the welding of the second end 132 of the support leg 130 and the outer wall of the pile body 210 by the workers.

[0071] In one specific embodiment, the length of the end face of the second end 132 is 6 mm. The length of the chamfered surface 143 is 5.5 mm.

[0072] Optionally, the angle between the end face of the second end 132 and the chamfered face 143 is 40 to 50 degrees.

[0073] In one specific embodiment, the angle between the end face of the second end 132 and the chamfered surface 143 is 45 degrees.

[0074] In some embodiments, optionally, such as Figure 1 As shown, the locking part 120 includes two bent parts 121. One end of the bent part 121 is connected to the first side wall 111, and the other ends of the two bent parts 121 are bent in a direction that brings them closer to each other. The two bent parts 121 and the connecting plate 110 form a groove 122.

[0075] It should be emphasized that when the locking part 120 has a groove structure, the locking part 120 includes two bent parts 121, and the two bent parts 121 and the connecting plate 110 surround the groove 122.

[0076] The locking part 120 of the other pile 200 is a protruding structure. The two adjacent piles 200 are connected to each other by the cooperation of the groove structure and the protruding structure.

[0077] In some embodiments, the bent portion 121 may optionally have a fifth side wall 1211 and a sixth side wall 1212 disposed opposite to each other, the fifth side wall 1211 being connected to the first side wall 111 via a second arc transition surface 142.

[0078] In other words, the fifth side wall 1211 and the first side wall 111 have a smooth transition. This design effectively avoids stress concentration and helps ensure the connection strength between the bent portion 121 and the connecting plate 110.

[0079] Optionally, the first sidewall 111 includes a first smooth segment. The fifth sidewall 1211 is connected to the first smooth segment via a second arc transition surface 142.

[0080] Optionally, the length of the first smooth segment is 19 mm to 20 mm.

[0081] In some embodiments, the area of ​​the first smooth segment is optionally larger than the area of ​​the second smooth segment 1121.

[0082] In one specific embodiment, the length of the first smooth segment is 19.5 mm.

[0083] Optionally, the radius corresponding to the second arc transition surface 142 is 7mm to 9mm.

[0084] In one specific embodiment, the radius corresponding to the second arc transition surface 142 is 8mm.

[0085] In some embodiments, optionally, the end face of the bent portion 121 away from the connecting plate 110 is a third arc transition surface 1213, which is used to connect the fifth side wall 1211 and the sixth side wall 1212.

[0086] The fifth side wall 1211 and the sixth side wall 1212 have a smooth transition at the end away from the connecting plate 110.

[0087] By setting the third arc transition surface 1213, it can play a guiding role to a certain extent, so that the protruding structure of another foundation pile 200 can smoothly enter the groove 122, so as to realize the mutual connection of two adjacent foundation piles 200.

[0088] Optionally, the radius corresponding to the third circular arc transition surface 1213 is 5 mm to 7 mm.

[0089] In one specific embodiment, the radius corresponding to the third arc transition surface 1213 is 6mm.

[0090] In some embodiments, optionally, such as Figure 2 As shown, the locking part 120 includes a limiting protrusion 123. One end of the limiting protrusion 123 is connected to the first side wall surface 111, and the limiting protrusion 123 has a seventh side wall surface 1231 and an eighth side wall surface 1232 disposed opposite to each other. The seventh side wall surface 1231 is connected to the first side wall surface 111 through a fourth arc transition surface 144. The eighth side wall surface 1232 is connected to the first side wall surface 111 through a fifth arc transition surface 145.

[0091] It should be emphasized that when the locking part 120 is a raised structure, the locking part 120 includes a limiting protrusion 123. The locking part 120 of the other foundation pile 200 is a groove structure. The mutual cooperation between the groove structure and the raised structure enables the interconnection of two adjacent foundation piles 200.

[0092] The seventh side wall 1231 and the first side wall 111 are smoothly transitioned. By setting the fourth arc transition surface 144, stress concentration can be effectively avoided, which helps to ensure the connection strength between the limiting protrusion 123 and the connecting plate 110.

[0093] The eighth side wall 1232 and the first side wall 111 are smoothly transitioned. By setting the fifth arc transition surface 145, stress concentration can be effectively avoided, which helps to ensure the connection strength between the limiting protrusion 123 and the connecting plate 110.

[0094] In some embodiments, optionally, when the latching portion 120 is a recessed structure, the linear density G of the latching structure 100 is 20 kg / m to 21 kg / m. When the latching portion 120 is a protruding structure, the linear density G of the latching structure 100 is 18 kg / m to 19 kg / m.

[0095] In one specific embodiment, when the locking portion 120 is a groove structure, the linear density G of the locking structure 100 is 20.645 kg / m. When the locking portion 120 is a protruding structure, the linear density G of the locking structure 100 is 18.761 kg / m.

[0096] In some embodiments, optionally, such as Figure 1 and Figure 2 As shown, the locking structure 100 has a dimension of 55mm to 75mm in the first direction a.

[0097] The locking structure 100 has a dimension of 80mm to 90mm in the second direction b. The second direction b is perpendicular to the first direction a.

[0098] In one embodiment according to the present invention, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the foundation pile 200 includes a foundation pile body 210 and a locking structure 100 in any of the above embodiments. The second end 132 of the support leg 130 of the locking structure 100 is connected to the outer wall surface of the foundation pile body 210.

[0099] It should be noted that since the foundation pile 200 includes the locking structure 100 in any of the above embodiments, it has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0100] The foundation pile 200 can be a steel pipe pile or a steel sheet pile, and can be flexibly set according to the actual application scenario. The foundation pile body 210 is a steel pipe or a steel plate.

[0101] In some embodiments, optionally, in a foundation pile 200, the number of locking structures 100 is at least two, that is, there can be two or more locking structures 100. Taking into account spatial layout, space occupied, connection strength, cost and other factors, the locking structures 100 can be flexibly set according to actual needs.

[0102] In one specific embodiment, the foundation pile 200 includes two locking structures 100. The included angle between the two locking structures 100 is a second included angle γ.

[0103] In a specific embodiment, such as Figure 5 As shown, the second included angle γ is 90 degrees.

[0104] In a specific embodiment, such as Figure 6 As shown, the second included angle γ is 135 degrees.

[0105] In one specific embodiment, the second included angle γ is 180 degrees.

[0106] Multiple piles, 200 each, form the foundation pit retaining structure. The foundation pit retaining structure mainly bears the water pressure and soil pressure generated by the unloading during foundation pit excavation and transfers this pressure to the supports. It is a temporary retaining wall structure used during construction to stabilize the foundation pit.

[0107] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0108] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0109] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0110] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A locking structure, characterized in that, include: The connecting plate (110) has a first side wall (111) and a second side wall (112) disposed opposite to each other. The locking part (120) is connected to the first side wall surface (111); Two legs (130) are provided, each leg (130) having a first end (131) and a second end (132) disposed opposite to each other. The first end (131) is connected to the second side wall (112), and the second end (132) is used to connect to the outer wall of the pile body (210). The leg (130) also has a third side wall (133) and a fourth side wall (134) disposed opposite to each other. The first end (131) is located at one end of the third side wall (133) and the fourth side wall (134), and the second end (132) is located at the other end of the third side wall (133) and the fourth side wall (134). The third sidewall (133) and the second sidewall (112) are connected by a first arc transition surface (141), and the distance between the two legs (130) gradually increases from the first end (131) to the second end (132).

2. The locking structure according to claim 1, characterized in that, The angle between the support leg (130) and the connecting plate (110) is the first angle, which is 5 to 10 degrees.

3. The locking structure according to claim 1, characterized in that, The second sidewall (112) includes a second smooth segment (1121), and the third sidewall (133) is connected to the second smooth segment (1121) through the first arc transition surface (141). The area of ​​the third sidewall (133) is a first value, and the area of ​​the second smooth segment (1121) is a second value. The first value is 2 to 2.3 times the second value.

4. The locking structure according to any one of claims 1 to 3, characterized in that, The end face of the second end (132) is connected to the fourth side wall (134) through a chamfered surface (143).

5. The locking structure according to claim 4, characterized in that, The area of ​​the end face of the second end (132) is a third value, the area of ​​the chamfered surface (143) is a fourth value, and the third value is 1 to 1.1 times the fourth value.

6. The locking structure according to any one of claims 1 to 3, characterized in that, The locking part (120) includes: Two bends (121) are provided, one end of which is connected to the first side wall (111), and the other ends of the two bends (121) are bent toward each other. The two bends (121) and the connecting plate (110) together form a groove (122).

7. The locking structure according to claim 6, characterized in that, The bent portion (121) has a fifth side wall (1211) and a sixth side wall (1212) arranged opposite to each other. The fifth side wall (1211) is connected to the first side wall (111) through a second arc transition surface (142).

8. The locking structure according to claim 7, characterized in that, The end face of the bent portion (121) away from the connecting plate (110) is a third arc transition surface (1213), which is used to connect the fifth side wall (1211) and the sixth side wall (1212).

9. The locking structure according to any one of claims 1 to 3, characterized in that, The locking part (120) includes: A limiting protrusion (123) is provided, one end of which is connected to the first side wall surface (111). The limiting protrusion (123) has a seventh side wall surface (1231) and an eighth side wall surface (1232) that are arranged opposite to each other. The seventh side wall surface (1231) is connected to the first side wall surface (111) through a fourth arc transition surface (144), and the eighth side wall surface (1232) is connected to the first side wall surface (111) through a fifth arc transition surface (145).

10. A foundation pile, characterized in that, include: Pile body (210); According to any one of claims 1 to 9, the second end (132) of the support leg (130) of the locking structure is connected to the outer wall surface of the pile body (210).

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