A precast pile connecting structure

Abstract

This application relates to a precast pile connection structure in the field of building engineering. It includes two adjacent piles, each with a pre-embedded female head at the top and a pre-embedded male head at the bottom, connected by threads. Both the pre-embedded male and female heads have anti-rotation pre-embedded ribs located inside the pile body. The pre-embedded male head can be a conical or cylindrical threaded body, and the corresponding pre-embedded female head is a pre-embedded plate with corresponding threaded holes. By pre-embedding the anti-rotation pre-embedded ribs and the corresponding pre-embedded male and female heads to the ends of the piles, during on-site pile splicing, the pre-embedded female head at the top of the lower pile is threaded to the pre-embedded male head at the bottom of the upper, hoisted pile, thus fixing the two adjacent piles. This installation is more efficient than welding connections. Furthermore, this installation process is less affected by rainwater and groundwater after installation, resulting in higher structural stability after installation.

Description

Technical Field

[0001] This application relates to the field of precast pipe pile technology, and in particular to a precast pile connection structure. Background Technology

[0002] Precast pile technology has been developed in the construction field for a long time. Precast piles, as various types of piles manufactured in factories or on-site, play a vital role in building construction. During construction, pile driving equipment is used to drive, press, or vibrate precast piles into the soil. Precast piles mainly include two categories: precast concrete piles and steel piles. Among them, precast concrete piles have advantages such as high structural strength and high construction efficiency, and are widely used in building foundation construction.

[0003] In the design of pile foundations for high-rise buildings, a relatively deep pile foundation is required to ensure the stability of the superstructure. Since the length of a single pile generally does not reach the designed depth, precast piles need to be connected one by one on-site and driven downwards until they reach the designed depth. This process is called pile splicing.

[0004] Currently, the common method for splicing piles in related technologies is welding. The end face of the precast pile is equipped with a reserved part for welding. During the splicing process, the upper precast pile is hoisted onto the lower precast pile, and the welding construction begins after the two precast piles are aligned.

[0005] The aforementioned technologies have the following drawbacks: Pile driving operations are generally conducted outdoors, and during joint welding, the quality of the weld is difficult to guarantee due to the influence of rain and wind, creating potential hazards for pile splicing and directly affecting the quality of the pile foundation. Furthermore, after welding, the joint temperature is high. If the joint suddenly encounters groundwater during pile driving, the pile head may be quenched, causing the weld to become brittle, directly affecting the load-bearing capacity of the precast pile. Therefore, weld quality is difficult to guarantee and needs improvement. Summary of the Invention

[0006] To improve the problem of unstable quality of welded pile joints, this application provides a precast pile connection structure.

[0007] The precast pile connection structure provided in this application adopts the following technical solution:

[0008] A precast pile connection structure includes two adjacent pile bodies. A pre-embedded female head is provided at the top of the pile body, and a pre-embedded male head is provided at the bottom of the pile body. The pre-embedded male head and the pre-embedded female head are threaded together. Both the pre-embedded male head and the pre-embedded female head are provided with anti-rotation pre-embedded ribs, which are located inside the pile body.

[0009] By adopting the above technical solution, the anti-rotation embedded bars and corresponding embedded male and female heads are pre-installed to the end of the pile body through pre-embedding. In the process of splicing the piles on site, the embedded female head at the top of the pile body located below is threaded to the embedded male head at the bottom of the pile body in the hoisted state located above, which can realize the fixation between two adjacent pile bodies. The installation efficiency is higher than that of welding connection. In addition, this installation process is not easily affected by rainwater, and it is not easily affected by groundwater after installation. Therefore, the structural stability after installation is higher.

[0010] Preferably, the pre-embedded male head is a tapered threaded body, and the pre-embedded female head is a pre-embedded plate with a tapered threaded hole, wherein the tapered threaded body is threadedly connected to the tapered threaded hole.

[0011] By adopting the above technical solution, the conical thread body can provide a certain guiding effect in the initial stage of pile connection, improving the convenience of the connection process. In addition, the conical thread has better sealing performance than the metric thread, which is more conducive to reducing the impact of groundwater at the pile connection point during the pile formation process.

[0012] Preferably, the pre-embedded male head is a cylindrical threaded body, and the pre-embedded female head is a pre-embedded plate with a cylindrical threaded hole, wherein the cylindrical threaded body is threadedly connected to the cylindrical threaded hole.

[0013] By adopting the above technical solution, the pre-embedded male head uses a cylindrical threaded body and the pre-embedded female head uses a pre-embedded plate with a cylindrical threaded hole for threaded connection, which makes the structural processing more convenient and still allows the two piles to be reliably connected.

[0014] Preferably, the end face of the pile body is provided with an installation ring groove, and a waterproof ring is provided in the installation ring groove, the waterproof ring abutting between the end faces of two adjacent pile bodies.

[0015] By adopting the above technical solution, an installation ring groove is set on the end face of the pile, and a waterproof ring is installed in it, abutting between the end faces of two adjacent piles, which can play a waterproof role. Especially during the subsequent pile driving process, the gap between adjacent piles is prone to change during intermittent stress. At this time, the waterproof ring can automatically fill this gap change, further improving the waterproof performance.

[0016] Preferably, the number of anti-rotation embedded bars is two or more, and a connecting bar is provided between adjacent anti-rotation embedded bars.

[0017] By adopting the above technical solution, two or more anti-rotation embedded bars are arranged at the axial position of the pile body, which improves the stability of the embedded male and female heads and the pile body in the rotation direction during the pile rotation process; connecting bars are set between adjacent anti-rotation embedded bars, which improves the pull-out stability between the embedded male and female heads and the pile body.

[0018] Preferably, the number of anti-rotation embedded bars is three or more, and an internal tie bar is provided between two adjacent anti-rotation embedded bars.

[0019] By adopting the above technical solutions, the pull-out stability between the pre-embedded male head, the pre-embedded female head and the pile body can be improved. It can also allow the three adjacent anti-rotation pre-embedded bars to form a stable triangular structure through connecting bars and internal tie bars, so that the shear force can be better distributed by several anti-rotation pre-embedded bars during the rotation and splicing process, and the overall stability can be further improved.

[0020] Preferably, the anti-rotation embedded bar is connected to a barb, and the barb is inclined in a direction away from the center of the pile.

[0021] By adopting the above technical solution, the anti-rotation embedded bar is connected to the hook bar that is inclined away from the center of the pile, which can improve the pull-out resistance.

[0022] Preferably, an anti-rotation groove is provided on the side wall of the pile near the end, and the anti-rotation grooves between adjacent piles form an anti-rotation hole.

[0023] By adopting the above technical solution, an anti-rotation groove is provided on the side wall of the pile near the end. The anti-rotation grooves of adjacent piles form an anti-rotation hole. After the two piles are threaded together, an anti-rotation block of appropriate specifications can be inserted into the anti-rotation hole to further improve the stability of the two piles after threading together and reduce the probability of the two piles reversing.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Piling is performed by pre-embedded male and female threaded connections, replacing welding construction. This method is more efficient, unaffected by rainwater, and unaffected by groundwater after installation. It can improve the problem of unstable quality of welded piling and enhance the structural stability after installation.

[0026] 2. The conical thread body can provide guidance in the early stage of pile splicing, improve the convenience of the splicing process, and the conical thread has better sealing performance than the metric thread, which helps to reduce the impact of groundwater at the pile splicing point.

[0027] 3. The anti-rotation embedded bars are connected with barbs, which can improve the pull-out resistance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure in the embodiment of this application where the pre-embedded male end is a tapered thread body;

[0029] Figure 2 This is a schematic diagram of the structure in the embodiment of this application where the pre-embedded male end is a cylindrical threaded body;

[0030] Figure 3This is a structural schematic diagram illustrating the connection relationship between the anti-rotation embedded reinforcement, the connecting reinforcement, and the internal tie reinforcement in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram illustrating the connection relationship between the anti-rotation block and the anti-rotation hole in an embodiment of this application.

[0032] In the picture:

[0033] 1. Pile body; 111. Conical threaded body; 112. Cylindrical threaded body; 12. Embedded plate; 121. Conical threaded hole; 122. Cylindrical threaded hole;

[0034] 2. Anti-rotation embedded bars; 21. Connecting bars; 22. Internal tie bars; 23. Barbed bars;

[0035] 3. Waterproof ring; 30. Install ring groove;

[0036] 4. Anti-rotation hole; 40. Anti-rotation groove; 41. Anti-rotation block. Detailed Implementation

[0037] The technical solutions in the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this utility model, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are also within the protection scope of this utility model.

[0038] This application mainly adopts a pre-embedded male and pre-embedded female threaded connection scheme, which achieves the effect of avoiding the influence of the environment on the welded joint and improving the connection stability. The following is a further detailed description of this application. Example

[0039] Reference Figure 1 The precast pile connection structure provided in this application embodiment includes two adjacent pile bodies 1. A pre-embedded female head is provided at the top of the pile body 1, and a pre-embedded male head is provided at the bottom of the pile body 1. The pre-embedded male head and the pre-embedded female head are threaded together. In addition, both the pre-embedded male head and the pre-embedded female head are provided with anti-rotation pre-embedded ribs 2 located inside the pile body 1, which achieves the effect of improving pile splicing efficiency and structural stability. The reason is that the relevant components are pre-installed by pre-embedding, and only threaded connection is required on site, which is not affected by environmental factors such as rainwater and groundwater.

[0040] Specifically, pile body 1 is generally a precast concrete pile. This type of pile body 1 has advantages such as high structural strength and high construction efficiency, and is suitable for building foundation construction. The material of pile body 1 is sturdy and durable, and can withstand large pressure and tension.

[0041] The embedded male head can be a conical threaded body 111 or a cylindrical threaded body 112. When it is a conical threaded body 111, its shape is conical and there are threads on the outer surface. The conical design can play a certain guiding role in the initial stage of pile connection, facilitating the quick alignment of the embedded male head of the upper pile body 1 with the embedded female head of the lower pile body 1. In terms of material, high-strength steel can be used to ensure the stability and reliability of its connection. Refer to Figure 2 , if a cylindrical threaded body 112 is adopted, it is a cylinder and there are also threads on the outer surface. The cylindrical threaded body 112 is relatively simple in processing and manufacturing, and the cost may also be lower.

[0042] The embedded female head can be an embedded plate 12 with a conical threaded hole 121 or an embedded plate 12 with a cylindrical threaded hole 122. When it is an embedded plate 12 with a conical threaded hole 121, the embedded plate 12 is embedded in the top of the pile body 1, and the conical threaded hole 121 on it is adapted to the conical threaded body 111. The embedded plate 12 is usually made of a metal material that combines tightly with the pile body 1 and is corrosion-resistant. Refer to Figure 2 , if it is an embedded plate 12 with a cylindrical threaded hole 122, its structure is similar to the former, except that the threaded hole is cylindrical and matches the cylindrical threaded body 112.

[0043] Refer to Figure 3 , in this embodiment, the number of the anti-rotation embedded bars 2 is four, and a connecting bar 21 is arranged between adjacent anti-rotation embedded bars 2. The anti-rotation embedded bars 2 are generally long strip-shaped steel bars, arranged at positions near the ends inside the pile body 1. The purpose is to prevent the relative rotation between the embedded male head and the embedded female head and the pile body 1 during the rotational connection process. The anti-rotation embedded bars 2 can be made of high-strength steel bars to enhance their anti-torsion ability. The connecting bar 21 connects adjacent anti-rotation embedded bars 2 to form an integral structure, enhancing the anti-pulling stability between the embedded male head, the embedded female head and the pile body 1. The connecting bar 21 can be an ordinary steel bar, connected to the anti-rotation embedded bar 2 by welding or tying.

[0044] In addition, an internal tension bar 22 is arranged between two adjacent anti-rotation embedded bars 2 at intervals. The four anti-rotation embedded bars 2 and the connecting bar 21 form a square structure in the shape of a "mouth", and the internal tension bar 22 is arranged at the diagonal position. The internal tension bar 22 is also made of steel bar material. On the one hand, it enhances the anti-pulling stability between the embedded male head, the embedded female head and the pile body 1. On the other hand, it makes a triangular structure formed among three adjacent anti-rotation embedded bars 2 through the connecting bar 21 and the internal tension bar 22. The triangular structure has the characteristic of strong stability and can better distribute the shear force during the rotational pile connection process, thus further enhancing the overall stability.

[0045] Refer to Figure 1The anti-rotation embedded bar 2 is also connected to a barb 23, which is inclined away from the center of the pile 1. The barb 23 is shaped like a hook, and its inclined arrangement can increase the anchoring force inside the pile 1 and further improve the pull-out resistance. The barb 23 is made of the same material as the anti-rotation embedded bar 2 and is connected to the anti-rotation embedded bar 2 by welding or other reliable connection methods.

[0046] Reference Figure 1 The end face of pile body 1 is provided with an installation ring groove 30, which is an annular groove formed on the end face of pile body 1. A waterproof ring 3 is provided inside the installation ring groove 30. The waterproof ring 3 is usually made of rubber and has good elasticity and waterproof performance. The waterproof ring 3 abuts between the end faces of two adjacent pile bodies 1 and is located outside the pre-embedded male and female heads. It can prevent groundwater and other liquids from penetrating into the connection part, protect the connection structure from water erosion, and improve the durability of the structure.

[0047] Reference Figure 1 and Figure 4 An anti-rotation groove 40 is provided on the side wall of pile 1 near its end. The anti-rotation grooves 40 between adjacent piles 1 form an anti-rotation hole 4. The anti-rotation groove 40 can be a square groove, and thus the anti-rotation hole 4 is a square hole. After the two piles 1 are threaded together, the two anti-rotation grooves 40 are aligned to form the anti-rotation hole 4. Subsequently, an anti-rotation block 41 of appropriate specifications can be inserted into the anti-rotation hole 4. The anti-rotation block 41 is generally a square metal block or concrete block, and its function is to further improve the stability of the two piles 1 after threading together and reduce the probability of the two piles 1 reversing.

[0048] The assembly logic of these components is as follows: the initial fixation of the two pile bodies 1 is achieved through the threaded connection of the pre-embedded male and female heads; the anti-rotation pre-embedded reinforcement 2 and its related connecting reinforcement 21, internal tie reinforcement 22, and barb reinforcement 23 ensure the stability of the connection in the rotational and tensile directions; the waterproof ring 3 prevents water intrusion; and the anti-rotation groove 40 and anti-rotation block 41 further enhance the stability of the connection. Together, they make the entire precast pile connection structure more robust and reliable.

[0049] The implementation principle of this embodiment is as follows: The precast pile connection structure of this embodiment replaces the traditional welding pile splicing method with a threaded connection of pre-embedded male and female heads. This avoids the problem of weld quality being affected by environmental factors such as rain and wind during the welding process, and also prevents the joint from becoming brittle after quenching in groundwater. Pre-embedding relevant components in advance simplifies and speeds up on-site installation, improving pile splicing efficiency. Simultaneously, through various reinforcement measures, such as anti-rotation embedded bars 2, connecting bars 21, internal tie bars 22, barbed bars 23, waterproof rings 3, and anti-rotation blocks 41, the stability and durability of the connection structure are greatly improved. This represents a significant improvement over existing technology and better meets the requirements of building engineering for the quality of pile foundation connections.

[0050] 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. A precast pile connection structure comprising two adjacent pile bodies (1), characterized in that: The top of the pile body (1) is provided with a pre-embedded female head, and the bottom of the pile body (1) is provided with a pre-embedded male head. The pre-embedded male head and the pre-embedded female head are threaded together. Both the pre-embedded male head and the pre-embedded female head are provided with anti-rotation pre-embedded ribs (2). The anti-rotation pre-embedded ribs (2) are located inside the pile body (1).

2. The precast pile connection structure according to claim 1, characterized in that: The pre-embedded male head is a conical threaded body (111), and the pre-embedded female head is a pre-embedded plate (12) with a conical threaded hole (121). The conical threaded body (111) is threadedly connected to the conical threaded hole (121).

3. The precast pile connection structure according to claim 1, characterized in that: The pre-embedded male head is a cylindrical threaded body (112), and the pre-embedded female head is a pre-embedded plate (12) with a cylindrical threaded hole (122). The cylindrical threaded body (112) is threadedly connected to the cylindrical threaded hole (122).

4. The precast pile connection structure according to claim 1, characterized in that: The end face of the pile body (1) is provided with an installation ring groove (30), and a waterproof ring (3) is provided in the installation ring groove (30). The waterproof ring (3) abuts between the end faces of two adjacent pile bodies (1).

5. A precast pile connection structure according to claim 1, characterized in that: The number of anti-rotation embedded bars (2) is two or more, and a connecting bar (21) is provided between adjacent anti-rotation embedded bars (2).

6. A precast pile connection structure according to claim 5, characterized in that: The number of anti-rotation embedded bars (2) is three or more, and an inner tie bar (22) is provided between two adjacent anti-rotation embedded bars (2).

7. The precast pile connection structure according to claim 1, characterized in that: The anti-rotation embedded bar (2) is connected to a barb (23), which is inclined in a direction away from the center of the pile body (1).

8. A precast pile connection structure according to claim 1, characterized in that: The side wall of the pile (1) near the end is provided with an anti-rotation groove (40), and the anti-rotation grooves (40) between adjacent piles (1) form an anti-rotation hole (4).

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