A connecting structure of a precast pile and a construction method

Abstract

The application provides a connecting structure and construction method of a precast pile, comprising at least two connecting clamps and a plurality of connecting rods, the connecting clamps are sleeved with end plates of opposite precast piles; the connecting rods are connected with fasteners through the connecting clamps, the connecting rods are located at welding bevels of the end plates of the opposite precast piles and are welded with the end plates into an integral whole, one end of the connecting rod connected with the welding bevel is a connecting head, one end of the connecting rod connected with the fastener is a connecting end, the connecting end is connected with the fastener and is used for locking the end plates of adjacent precast piles. The application can avoid punching holes in the side surface of the end plate, can improve the mechanical properties of the end plate and can prevent the end plate from failing under the impact of a pile driver.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a connection structure and construction method for precast piles. Background Technology

[0002] With the increasing importance and height of modern buildings, higher requirements are placed on the bearing capacity of the foundation. Natural foundations can no longer adequately bear the loads transmitted from the superstructure. Concrete piles are used as foundation piles, which are driven into the ground by a pile driver to become foundation piles, allowing the superstructure to support the building.

[0003] For precast piles used in foundations, especially those used in pull-out engineering, it is crucial to address the connection between piles and the connection between the pile top and the pile cap. Currently, the main connection methods for piles are end plate welding or mechanical connection. Regardless of whether welding or mechanical connection is used, the force at the connection point is tensile, which leads to very high requirements for joint construction. Welding connection is greatly affected by weather and the skill level of on-site pile foundation construction personnel. It also requires a high level of technical expertise from the construction personnel, resulting in significant differences in the quality of pile-to-pile welding. The welding quality is difficult to control and can easily lead to safety hazards in the connection structure at the pile head of the precast pile.

[0004] Since the quality of welding directly affects the use of concrete components, it can create safety hazards in the project. Using mechanical connection joints can eliminate the need for welding during on-site pile installation, offering advantages such as simple structure, high tensile strength, low cost, and high construction efficiency. However, some projects, in order to completely eliminate the installation quality risks caused by significant differences in the quality of connecting parts due to varying processing levels, have adopted a connection method of welding followed by mechanical connection, or mechanical connection followed by welding. Most of these combined mechanical connection and welding connection methods require additional radial threaded holes to be machined on the end plate of the precast pile, weakening the end plate's structure. Furthermore, under the impact of the pile driver, the threaded holes are prone to deformation, and in some cases, even cracking, leading to a decline in the mechanical properties of the end plate. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a connection structure and construction method for precast piles, which avoids drilling holes on the side of the end plate, improves the mechanical properties of the end plate, and prevents the end plate from failing under the impact of the pile driver.

[0006] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0007] A connection structure for precast piles includes at least two connecting clips and several connecting rods. The connecting clips are sleeved on the end plates of the adjacent precast piles. The connecting rods pass through the connecting clips and are connected to fasteners. The connecting rods are located at the welding bevel of the end plates of the adjacent precast piles and are welded to the end plates as a whole. One end of the connecting rod connected to the welding bevel is a connecting head, and the other end connected to the fastener is a connecting end. The connecting end is connected to the fasteners to lock the end plates of adjacent precast piles. This avoids connecting the end plates of adjacent precast piles together while drilling holes on the side of the end plates, which can improve the mechanical properties of the end plates and prevent the end plates from failing under the impact of the pile driver.

[0008] Furthermore, the connecting card has at least one mounting hole, and the other end of the connecting rod passes through the mounting hole and is connected to the fastening device; the side of the mounting hole that intersects with the inner wall of the connecting card is the inner hole, and the side of the mounting hole that intersects with the outer wall of the connecting card is the outer hole, and the cross-sectional dimensions of the inner hole and the outer hole are the same.

[0009] Furthermore, the connecting card has at least one mounting hole, and the other end of the connecting rod passes through the mounting hole and is connected to the fastening device; the side of the mounting hole that intersects with the inner wall of the connecting card is the inner hole, and the side of the mounting hole that intersects with the outer wall of the connecting card is the outer hole, and the cross-sectional dimension of the inner hole is larger than that of the outer hole.

[0010] Furthermore, the line connecting the center point of the inner hole and the center of the corresponding cross-section of the pile body is the first axis, and the line connecting the center point of the outer hole and the center of the corresponding cross-section of the pile body is the second axis. The first axis and the second axis are not collinear.

[0011] Furthermore, several of the connecting rods are perpendicular to the wall surface of the precast pile.

[0012] Furthermore, some of the connecting rods are radially coincident with / parallel to the precast piles; the included angle between adjacent connecting rods is 25° to 35°.

[0013] Furthermore, the connector tapers from the outside to the inside, and the shape of the connector is adapted to the shape of the accommodating space formed by the bevel between the adjacent end plates, so as to ensure that the mechanical properties of the connector and the circumferential joint meet the requirements.

[0014] Furthermore, the connecting end is threaded, and the fastener is a nut.

[0015] Furthermore, the end plate includes a locking platform and an end plate boss, and the connecting clip is sleeved on the locking platform; the inner surface of the end of the pile sleeve hoop of the precast pile abuts against the outer peripheral surface of the end plate boss, and the end plate boss is used to radially position the pile sleeve hoop of the precast pile.

[0016] Furthermore, a slot is provided between the card platform and the end plate boss, and one end of the pile sleeve is located in the slot.

[0017] A construction method for a precast pile connection structure includes the following steps:

[0018] The end plates of the precast piles that are connected to each other are pre-treated.

[0019] Align the end plates of adjacent precast piles so that the end plates of adjacent precast piles are pressed together.

[0020] Weld the end plate and the connecting rod together;

[0021] Welding is performed at the bevel positions of adjacent end plates;

[0022] When welding to the position of the connecting rod, insert the connecting rod into the welding groove and weld the connecting rod to the end plate;

[0023] After the connecting clip passes through the connecting rod, it is sleeved with the end plate of the adjacent precast pile;

[0024] The fasteners are connected to the connecting rod, so that the connecting clip is locked to the outside of the end plate, which is used to lock the adjacent end plates.

[0025] Furthermore, a positioning device is installed on the pile body of the mating precast piles to mark the position of the welding connecting rod on the outside of the end plate; the positioning device is a positioning ring or a positioning strap.

[0026] Furthermore, when welding the end plate to the connecting rod, first weld the connecting rod to the end plate of one precast pile, and then weld the end plate of the other precast pile to the connecting rod and the end plate of one precast pile.

[0027] Furthermore, when welding the end plate to the connecting rod, the end plates of the precast piles are continuously welded at the bevel position. When welding to the connecting rod position, the connecting rod is inserted into the welding bevel and welded to the end plate.

[0028] The beneficial effects of this invention are as follows:

[0029] 1. The connection structure and construction method for precast piles described in this invention, by providing a plurality of connecting rods at the joint of the precast piles, with each connecting clip passing through at least one of the connecting rods and sleeved with the end plate of the adjacent precast pile, and the other end of the connecting rod extending out of the connecting clip being connected to a fastening device, avoids connecting the end plates of adjacent precast piles together while drilling holes on the side of the end plate, thereby improving the mechanical properties of the end plate and preventing the end plate from failing under the impact of the pile driver. Furthermore, avoiding drilling holes on the side of the end plate reduces the processing steps for the end plate and lowers the project cost.

[0030] 2. The connection structure and construction method of the precast piles described in this invention, by placing the connecting rod at the weld of the end plate of the adjacent precast piles, enables the connection of the precast piles to achieve a combination of welding and mechanical connection, which greatly improves the connection quality of the precast piles and eliminates safety hazards. When using this structure for construction, it has the advantages of simple installation structure, low requirements, and convenient construction.

[0031] 3. The connection structure and construction method for precast piles described in this invention achieve a dual connection structure of welding and mechanical connection by inserting a connector into the weld seam of the end plates of adjacent precast piles. The shape of the connector is adapted to the shape of the accommodating space formed by the bevel between adjacent end plates, thus ensuring welding quality while also achieving advantages such as convenient construction, low cost, and high efficiency.

[0032] 4. The connection structure and construction method of the precast piles described in this invention, by having grooves on the connecting clips, with the edges of the end plates of adjacent concrete components located within the grooves, can restrict the movement of the concrete components and achieve a double-layer connection. This facilitates installation and is particularly suitable for columns with square and round shapes.

[0033] 5. The connection structure and construction method of the precast pile described in this invention, with the slot on the end plate, helps to ensure the installation quality of the pile sleeve during the production process of the precast pile, thereby ensuring the size of the card platform used to connect with the connecting card is guaranteed.

[0034] 6. In the connection structure and construction method of the precast pile described in this invention, the installation holes on the connecting card have different inner and outer opening sizes. For precast piles with a circular shape, this facilitates the installation of the connecting rod and the connecting card. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the connection structure of the precast piles described in this invention.

[0037] Figure 2 for Figure 1 A magnified view of part A.

[0038] Figure 3 This is a cross-sectional view of the end plate described in this invention.

[0039] Figure 4This is a schematic diagram of the connecting rod structure described in this invention.

[0040] Figure 5 This is a schematic diagram of the connecting rod structure two described in this invention.

[0041] Figure 6 This is a cross-sectional view of the connection card described in this invention.

[0042] Figure 7 This is a schematic diagram of the end plate after welding according to the present invention.

[0043] Figure 8 This is a schematic diagram of the arc-shaped connecting card described in this invention.

[0044] Figure 9 This is a schematic diagram of the installation of the arc-shaped connecting card according to the present invention.

[0045] In the picture:

[0046] 1-End plate; 1-1-End plate boss; 1-2-Card slot; 1-3-Card groove; 2-Connecting clip; 2-1-Groove; 2-2-Mounting hole; 3-Pile sleeve; 4-Connecting rod; 4-1-Connecting head; 4-2-Connecting end; 5-Pile body; 6-Nut. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0048] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Example 1 Figure 1 , Figure 2 and Figure 3 As shown, the precast pile connection structure of the present invention is characterized by comprising at least two connecting clips 2 and a plurality of connecting rods 4. The connecting clips 2 are sleeved with the end plates 1 of the adjacent precast piles. The connecting rods 4 pass through the connecting clips 2 and are connected to fasteners. The connecting rods 4 are located at the welding bevel of the end plates 1 of the adjacent precast piles and are welded to the end plates 1 as a whole. One end of the connecting rod 4 connected to the welding bevel is a connecting head 4-1, and the other end of the connecting rod connected to the fastener is a connecting end 4-2. The connecting end 4-2 is connected to the fasteners and is used to lock the end plates 1 of adjacent precast piles. This avoids connecting the end plates 1 of adjacent precast piles together while drilling holes on the side of the end plates 1, which can improve the mechanical properties of the end plates 1 and prevent the end plates 1 from failing under the impact of the pile driver. In addition, avoiding drilling holes on the side of the end plates 1 can reduce the processing steps of the end plates and reduce the cost of the project. When the precast pile is a square pile, the plurality of connecting rods 4 are perpendicular to the wall of the pile body 5. When the precast pile is a round pile, several of the connecting rods 4 are radially coincident / parallel to the pile body 5. Several distributed connecting rods 4 are evenly distributed around the pile body 5 in a radial arrangement. The included angle between adjacent connecting rods 4 is 25° to 35°. With the same length of connecting rods, the length of the connecting clip opening can be effectively reduced, thereby ensuring the strength of the connecting clip.

[0052] In Embodiment 2 of this invention, based on Embodiment 1, the connecting rod 4 is located at the weld of the end plate 1 of the adjacent precast pile. This enables a combined welding and mechanical connection for the precast piles, significantly improving the connection quality and eliminating safety hazards. This structure offers advantages such as simple installation, lower requirements, and convenient construction. To facilitate on-site welding, one end of the connecting rod 4 is a connector 4-1, which is inserted into the weld of the end plate 1 of the adjacent precast pile. Figure 7As shown. Due to the harsh working conditions during on-site welding, it is impossible to guarantee that the direction of the connecting rod 4 will meet the requirements after welding. Therefore, several positioning holes are provided at the bevel formed between adjacent end plates 1. The connecting head 4-1 is inserted into the positioning holes, which can accurately position the connecting rod 4. The other end of the connecting rod 4 is the connecting end 4-2, which passes through the connecting clip 2 and connects to the nut 6. The connecting end 4-2 can also be connected to other fastening structural components to lock the connecting clip 2 to the end plate 1.

[0053] There are three types of structures for connecting rod 4. Figure 4 The first structure of the connecting rod 4 is as follows: the connecting head 4-1 of the connecting rod 4 is conical, the connecting end 4-2 is provided with threads, and the connecting head 4-1 and the connecting end 4-2 are transitioned by an arc. Figure 5 The second structure of the connecting rod 4 is as follows: the connecting head 4-1 of the connecting rod 4 is cylindrical, the connecting end 4-2 is threaded, and the connecting head 4-1 and the connecting end 4-2 are arc-shaped transitions. Figure 2 The third structure of the connecting rod 4 is wherein the shape of the connecting head 4-1 is adapted to the shape of the accommodating space formed by the bevel between the adjacent end plates 1, so that the mechanical properties of the connecting head and the circumferential joint meet the requirements.

[0054] Embodiment 3 of the present invention is based on Embodiment 1 or Embodiment 2, such as... Figure 6 As shown, the connecting clip 2 has a groove 2-1, and the edges of the adjacent end plates 1 are respectively located in the groove 2-1, which is used to restrict the movement of concrete components and realize the mechanical connection between piles. The first structure of the connecting clip 2 is arc-shaped, which can be used to connect concrete piles with a cylindrical shape, and the second structure of the connecting clip 2 is straight, which can be used to connect square concrete piles.

[0055] Embodiment 4 of the present invention is based on any of the above embodiments, such as... Figure 3 As shown, the end plate 1 is provided with a slot 1-3, and one end of the pile sleeve hoop 3 is located in the slot 1-3.

[0056] Embodiment 5 of the present invention is based on any of the above embodiments, such as... Figure 3 As shown, the end plate 1 includes a mounting platform 1-2 and an end plate boss 1-1. The mounting platform 1-2 is provided with the end plate boss 1-1, and the connecting clip 2 is sleeved on the mounting platform 1-2, as shown. Figure 2As shown, the inner surface of the end of the pile sleeve 3 of the concrete component abuts against the outer circumferential surface of the end plate boss 1-1. The end plate boss 1-1 and the sleeve 3 are fitted together, and the end plate boss 1-1 is used to radially position the pile sleeve 3 on the pile body 5. To better position the pile sleeve 3, a groove 1-3 is provided between the locking platform 1-2 and the end plate boss 1-1, and the pile sleeve 3 is located in the groove 1-3. To facilitate the installation of the pile sleeve 3, the edge of the boss 1-1 is provided with rounded corners or chamfers, which makes it easy for the pile sleeve 3 to be fitted onto the boss 1-1.

[0057] Embodiment 6 of the present invention is based on any of the above embodiments, such as... Figure 6 As shown, the connecting card 2 has at least one mounting hole 2-2, and the other end of the connecting rod 4 passes through the mounting hole 2-2 and is connected to the fastening device. The side of the mounting hole 2-2 that intersects with the inner wall of the connecting card 2 is designated as the inner hole 2-2-2, and the side of the mounting hole 2-2 that intersects with the outer wall of the connecting card 2 is designated as the outer hole 2-2-1. The cross-sectional dimensions of the inner hole 2-2-2 and the outer hole 2-2-1 are the same. The connecting card 2 in Embodiment 6 is straight or curved.

[0058] like Figure 8 and Figure 9 The mounting hole 2-2 on the connecting card 2 shown is an irregularly shaped hole. The side of the mounting hole 2-2 that intersects with the inner wall of the connecting card 2 is designated as the inner hole 2-2-2, and the side of the mounting hole 2-2 that intersects with the outer wall of the connecting card 2 is designated as the outer hole 2-2-1. The cross-sectional dimension of the inner hole 2-2-2 is larger than that of the outer hole 2-2-1. When the connecting card 2 is arc-shaped, the cross-sectional dimension of the inner hole 2-2-2 is larger than that of the outer hole 2-2-1, facilitating the arc-shaped connecting card 2 to be clamped onto the end plate perpendicular to the pile body direction. The line connecting the center point of the inner hole 2-2-2 to the center of the corresponding cross-section of the pile body 5 is the first axis, and the line connecting the center point of the outer hole 2-2-1 to the center of the corresponding cross-section of the pile body is the second axis. The first axis and the second axis are not collinear, allowing for minimal hole size while ensuring convenient installation and maintaining the strength of the connecting card. Figure 8 As shown. The cross-section of the corresponding pile body 5 can be understood as a section passing through the center point of the inner hole 2-2-2 or the center point of the outer hole 2-2-1, and perpendicular to the axis of the pile body 5.

[0059] The construction method for the precast pile connection structure of the present invention includes the following steps:

[0060] S01: After the construction of the next pile section is completed, clean the mud, debris and other contaminants from the surface of the pile end plate;

[0061] S02: Hoist the upper pile section to a position 0.3m to 1.5m above the lower pile section and clean the mud, debris, etc. from the surface of the pile end plate;

[0062] S03: After aligning the upper and lower precast pile sections, attach the upper end plate 1 of the lower precast pile section to the lower end plate 1 of the upper precast pile section, and mark the outside of the joint. The marked position is the installation position of the connecting rod.

[0063] S04: Install a positioning device at the pile joint. Mark the position of the welding connecting rod on the outside of the end plate according to the positioning device. The positioning device is a positioning ring or a positioning strap.

[0064] S05: Welding at the bevel of end plate 1 at the joint. Weld the upper and lower end plates as required. Stop welding when the connecting rod is marked.

[0065] S06: After inserting the outer side of the vertical end plate of the connecting rod 4 into the welding groove, continue welding to weld the end plate 1 and the connecting rod 4 together.

[0066] S07: Repeat the construction method of steps S05 and S06, and weld several connecting rods 4 between the welding bevels of adjacent end plates in sequence;

[0067] S08: After the welding work is completed, after passing the mounting hole 2-2 of the connecting card 2 through the connecting rod 4, install the card slot 2-1 of the connecting card 2 on the card platform 1-2 of the end plate;

[0068] S09: Use nut 6 to connect with connector 2, and firmly fix connector 2 to the outside of end plate 1;

[0069] S10: Repeat steps S08 and S09 until all connection cards 2 are installed;

[0070] S011: Continue pile driving construction after checking the connection quality.

[0071] The construction method for the precast pile connection structure described in this invention can also involve first welding the lower end 1 of the upper precast pile to the connecting rod 4, and then welding the lower end 1 of the lower precast pile to the connecting rod 4 and the lower end 1 of the upper precast pile together. Alternatively, the lower end 1 of the lower precast pile to the connecting rod 4 can be welded first, and then the lower end 1 of the upper precast pile to the connecting rod 4 and the lower end 1 of the lower precast pile together.

[0072] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0073] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A connection structure for precast piles, characterized in that, It includes at least two connecting clips (2) and several connecting rods (4). The connecting clips (2) are sleeved with the end plates (1) of the precast piles. The connecting rods (4) pass through the connecting clips (2) and are connected to fasteners. The connecting rods (4) are located at the welding bevel of the end plates (1) of the precast piles and are welded to the end plates (1) as a whole. The end of the connecting rod (4) connected to the welding bevel is a connector (4-1), and the end of the connecting rod connected to the fastener is a connector (4-2). The connector (4-2) is connected to the fasteners and is used to lock the end plates (1) of the adjacent precast piles.

2. The connection structure of the precast piles according to claim 1, characterized in that, The connector (2) has at least one mounting hole (2-2). The side of the mounting hole (2-2) that intersects with the inner wall of the connector (2) is the inner hole (2-2-2). The side of the mounting hole (2-2) that intersects with the outer wall of the connector (2) is the outer hole (2-2-1). The cross-sectional dimensions of the inner hole (2-2-2) are the same as those of the outer hole (2-2-1).

3. The connection structure of the precast piles according to claim 1, characterized in that, The connector (2) has at least one mounting hole (2-2). The side of the mounting hole (2-2) that intersects with the inner wall of the connector (2) is the inner hole (2-2-2). The side of the mounting hole (2-2) that intersects with the outer wall of the connector (2) is the outer hole (2-2-1). The cross-sectional dimension of the inner hole (2-2-2) is larger than that of the outer hole (2-2-1).

4. The connection structure of the precast piles according to claim 3, characterized in that, The line connecting the center point of the inner hole (2-2-2) and the center of the corresponding cross-section of the pile body is the first axis, and the line connecting the center point of the outer hole (2-2-1) and the center of the corresponding cross-section of the pile body is the second axis. The first axis and the second axis are not collinear.

5. The connection structure of the precast piles according to claim 1, characterized in that, The connecting rod (4) is perpendicular to the wall of the precast pile.

6. The connection structure of the precast piles according to claim 1, characterized in that, Several of the connecting rods (4) are radially coincident / parallel to the precast piles; the included angle between adjacent connecting rods (4) is 25° to 35°.

7. The connection structure of precast piles according to claim 1, characterized in that, The connector (4-1) tapers from the outside to the inside, and the shape of the connector (4-1) is adapted to the shape of the accommodating space formed by the bevel between the adjacent end plates (1).

8. The connection structure of the precast piles according to claim 1, characterized in that, The connecting end (4-2) is threaded, and the fastener is a nut.

9. The connection structure of the precast piles according to claim 1, characterized in that, The end plate (1) includes a mounting plate (1-2) and an end plate boss (1-1), and the connecting clip (2) is sleeved on the mounting plate (1-2); the inner surface of the end of the pile sleeve hoop (3) of the precast pile abuts against the outer circumferential surface of the end plate boss (1-1).

10. The connection structure of the precast piles according to claim 9, characterized in that, A slot (1-3) is provided between the mounting plate (1-2) and the end plate protrusion (1-1), and one end of the pile sleeve (3) is located in the slot (1-3).

11. A construction method for a precast pile connection structure according to any one of claims 1-10, characterized in that, Includes the following steps: Align the end plates (1) of the precast piles that are connected to each other, so that the end plates (1) of the adjacent precast piles are pressed together. The end plate (1) is welded to the connecting rod (4); After the connecting clip (2) passes through the connecting rod (4), it is sleeved with the end plate (1) of the adjacent precast pile; The fasteners are connected to the connecting rod (4) to lock the connecting clip (2) to the outside of the end plate (1) for locking the adjacent end plate (1).

12. The construction method of the precast pile connection structure according to claim 11, characterized in that, A positioning device is installed on the pile body of the precast piles to mark the position of the welding connecting rod on the outside of the end plate (1); the positioning device is a positioning ring or a positioning strap.

13. The construction method of the precast pile connection structure according to claim 11, characterized in that, When welding the end plate (1) to the connecting rod (4), first weld the connecting rod (4) to the end plate (1) of a precast pile, and then weld the end plate (1) of the other precast pile to the connecting rod (4) and the end plate (1) of the precast pile.

14. The construction method of the precast pile connection structure according to claim 11, characterized in that, When welding the end plate (1) to the connecting rod (4), the end plate (1) of the precast pile is continuously welded at the bevel position. When welding to the position of the connecting rod (4), the connecting rod (4) is inserted into the welding bevel and the connecting rod (4) is welded to the end plate (1).

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