Polygonal inner hole precast pile capable of improving pulling resistance

Abstract

The utility model relates to a polygonal inner hole precast pile for improving pulling resistance, and relates to the technical field of concrete piles, the polygonal inner hole precast pile comprises a pile body, a first through hole is formed in the pile body in the length direction of the pile body, the first through hole comprises a first hole wall and a second hole wall which are parallel to each other, and a boss is fixedly connected to each of the first hole wall and the second hole wall. The precast pile has the effect of improving the pulling resistance of the precast pile and the bearing platform.

Description

Technical Field

[0001] This application relates to the field of concrete pile technology, and in particular to a polygonal precast pile with internal bore that improves pull-out resistance. Background Technology

[0002] Precast piles are widely used in building construction, especially in foundation engineering, where they play a crucial role. Traditional precast piles are typically cylindrical or square in shape, driven into the ground to enhance the stability of the building's foundation. In recent years, with the continuous growth of construction engineering demands and technological advancements, the design of precast piles has been constantly innovating, aiming to improve their performance and reliability. These innovations not only improve construction efficiency but also enhance the safety and durability of buildings.

[0003] Under relevant technologies, there are several common methods to address the problem of insufficient pull-out resistance at the connection between precast piles and pile caps. For example, pull-out resistance can be improved by increasing the pile diameter, deepening the pile length, or adding anchors; another common practice is to inject special cement grout into the pile tip to fill the voids and strengthen the bond. However, while these methods can solve the problem to some extent, they also have certain limitations.

[0004] While the aforementioned technologies and methods can improve the pull-out resistance between precast piles and pile caps to some extent, they still have significant drawbacks. Especially for applications requiring higher pull-out resistance, traditional methods often fall short. Specifically, simply increasing the pile diameter or length leads to increased costs, while simple cement grouting may not effectively fill all the tiny gaps, thus affecting the final connection strength. Therefore, a more effective solution is urgently needed that can significantly improve the pull-out resistance between precast piles and pile caps, while also considering economy and ease of construction. Utility Model Content

[0005] In order to improve the pull-out resistance of precast piles and pile caps, this application provides a polygonal inner-hole precast pile with improved pull-out resistance.

[0006] This application provides a precast polygonal pile with internal bore to improve pull-out resistance, employing the following technical solution:

[0007] A precast polygonal inner hole pile with improved pull-out resistance includes a pile body. The pile body has a first through hole along its own length. The first through hole includes a first hole wall and a second hole wall that are parallel to each other. A boss is fixedly connected to both the first hole wall and the second hole wall.

[0008] By adopting the above technical solution, two protrusions are set in the first through hole to form a polygonal inner hole structure, which effectively increases the contact area between the pile body and the filling concrete, thereby improving the pull-out resistance of the pile body. When subjected to external forces, the protrusions can disperse the tensile force borne by the pile body, reducing the risk of pile deformation and damage. Furthermore, by setting the protrusions, an adjustable angle steel cage tray is inserted into the first through hole, and the steel cage tray passes through the protrusions. By pouring concrete, the protrusions and steel cage are tightly connected, increasing friction and further improving the pull-out resistance of the pile body.

[0009] Optionally, a reinforcing partition is also included, which is located inside the first through hole and fixedly connected to the wall of the first through hole.

[0010] By adopting the above technical solution, since there is often residual grout blocking the first through hole in the inner wall of the pile, it is impossible to put in the steel cage with the tray. Therefore, by setting a reinforcing partition in the first through hole, the reinforcing partition replaces the tray, ensuring that the steel cage tray can be smoothly inserted to the design depth. At the same time, the reinforcing partition can also enhance the structural stability of the pile and further improve the compressive strength.

[0011] Optionally, multiple reinforcing diaphragms are provided, and multiple reinforcing diaphragms are spaced apart along the length direction of the pile body.

[0012] By adopting the above technical solution, in order to further improve the horizontal resistance of the pile, multiple reinforcing sections are set at intervals along the length of the pile so that the external force is borne by multiple reinforcing sections together, thereby enhancing the overall rigidity and horizontal resistance of the pile.

[0013] Optionally, the reinforcing section is provided with multiple vent holes extending through the pile body along its length.

[0014] By adopting the above technical solution, during the process of inserting the pile into the foundation, the air in the pile hole is gradually compressed, which will further generate pressure. The first through hole of the pile is equipped with multiple reinforcing partitions, which will prevent air circulation and may cause the pile to burst. To address this, by opening multiple vent holes on the reinforcing partitions, the air in the pile hole can be smoothly discharged, effectively reducing the internal pressure, preventing the pile from being damaged due to excessive air pressure, and ensuring construction safety.

[0015] Optionally, the axis of the first through hole coincides with the axis of the pile body.

[0016] By adopting the above technical solution, and by setting the axis of the first through hole to coincide with the axis of the pile body, the concrete distribution between the wall of the first through hole and the side wall of the pile body is made uniform, which further improves the uniformity of stress distribution when the pile body is under stress, avoids the occurrence of local stress weak points in the pile body, and enhances the overall structural stability.

[0017] Optionally, the pile body and the first through hole are configured to have the same shape.

[0018] By adopting the above technical solution and setting the pile body and the first through hole to have the same shape, it is further confirmed that the distance between the pile body sidewall and the first through hole wall is uniform, ensuring that the concrete filling is dense, improving the overall strength of the pile body, avoiding structural failure due to local weakness, and further ensuring the stability of the project.

[0019] Optionally, the two ends of the pile are fixedly sleeved with connectors, and when two adjacent piles are connected, the two connectors can be detachably connected.

[0020] By adopting the above technical solution, in order to facilitate the insertion of the pile into the foundation, a fixed connecting piece is set at both ends of the pile. When two adjacent piles are connected, the two piles are fixed by fitting the connecting piece together. The installation and disassembly are convenient and easy for personnel to operate.

[0021] Optionally, a locking component is also included, which includes a locking bolt and a locking nut. Each of the connectors has multiple connecting holes extending through it along the height direction of the pile body. The connecting holes are spaced apart along the circumferential direction of the pile body. The locking bolt passes through two connecting holes in sequence, and the locking nut is threadedly connected to the locking bolt and abuts against the bottom wall of the connector.

[0022] By adopting the above technical solution, when connecting and fixing two adjacent piles, the two piles can be fixedly connected by locking bolts and locking nuts, which makes installation and disassembly convenient.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. This application forms a polygonal inner hole structure by setting two protrusions in the first through hole, which effectively increases the contact area between the pile body and the filling concrete, thereby improving the pull-out resistance of the pile body. When subjected to external forces, the protrusions can disperse the tensile force borne by the pile body, reducing the risk of deformation and damage to the pile body. Furthermore, by setting the protrusions, an adjustable angle steel cage tray is inserted into the first through hole, and the steel cage tray is further poured with concrete through the protrusions, so that the protrusions and the steel cage tray are tightly connected, increasing the friction and further improving the pull-out resistance of the pile body.

[0025] 2. This application ensures the insertion depth of the tray by setting a reinforcing partition in the first through hole, thereby enhancing the overall rigidity and pull-out resistance of the pile body and effectively preventing the insertion depth from being hindered by residual grout on the inner wall of the pile. Furthermore, by opening vent holes on the reinforcing partition, the core filling concrete in the pile hole is poured smoothly, thereby improving the pull-out resistance of the pile body.

[0026] 3. This application improves the stability of the connection between two adjacent piles by setting up a connector. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a polygonal precast pile with internal bore that improves pull-out resistance, as described in this application.

[0028] Figure 2 This is a structural schematic diagram of the boss in this application;

[0029] Figure 3 This is a structural schematic diagram of the pile body in this application;

[0030] Figure 4 This is a structural schematic diagram of the connection between the reinforced partition and the boss in this application;

[0031] Figure 5 This is a structural schematic diagram of the reinforced partition of this application;

[0032] Figure 6 This is a top view of the boss in this application;

[0033] Figure 7 This is a structural schematic diagram of the connector in this application;

[0034] Figure 8 This is a schematic diagram of the connection between two adjacent connectors in this application.

[0035] Explanation of reference numerals in the attached drawings: 1. Pile body; 11. First through hole; 111. First hole wall; 112. Second hole wall; 2. Boss; 21. First space; 3. Reinforcing partition; 31. Vent hole; 4. Connector; 41. Connecting hole; 5. Locking component; 51. Locking bolt; 52. Locking nut. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0037] This application discloses a polygonal internal bore precast pile with improved pull-out resistance. (Refer to...) Figure 1 and Figure 2 The precast polygonal inner hole pile with improved pull-out resistance includes a pile body 1. The pile body 1 has a first through hole 11 along its own length. The first through hole 11 includes a first hole wall 111 and a second hole wall 112 that are parallel to each other. A boss 2 is fixedly connected to both the first hole wall 111 and the second hole wall 112. By setting the boss 2 in the first through hole 11 of the pile body 1 and inserting an adjustable angle steel cage tray into the first through hole 11, the boss 2 and the steel cage tray are in close contact, increasing the friction and thus improving the pull-out resistance of the pile body 1.

[0038] Reference Figure 3In some embodiments, the pile body 1 can be a square pile or a round pile, and can be a pile with a cross-section of equal diameter or a pile with a cross-section of unequal diameter. In this embodiment, the pile body 1 is a square pile. In some embodiments, the first through hole 11 can be a polygonal inner hole, such as a triangular, pentagonal, hexagonal, or octagonal shape, or a polygonal inner hole with arcs or beveled angles. The first through hole 11 can also be a square hole at both ends and a circular hole in the middle, or a circular hole at both ends and a square hole in the middle. The first through hole 11 can be threaded or sawtooth-shaped, and all variations in the shape of the pile body 1 and the shape of the first through hole 11 derived therefrom are subject to these variations. Within the scope of protection of this application, in this embodiment, the first through hole 11 is a square hole and is coaxially arranged with the pile body 1. By setting the first through hole 11 to be a square hole and coaxially arranged with the pile body 1, it is indicated that the distance between the four side walls of the first through hole 11 and the corresponding side walls of the pile body 1 is the same, that is, the concrete is evenly distributed, which further improves the uniformity of the force distribution when the pile body 1 is under stress, avoids the occurrence of local stress weak points in the pile body 1, and enhances the overall structural stability. In addition, the design of the boss 2 optimizes the contact area between the steel cage and the pile body 1, improves the pull-out resistance, is suitable for various geological conditions, and extends the service life of the pile body 1.

[0039] Reference Figure 4 Since residual grout often blocks the first through hole on the inner wall of the pile body, making it impossible to insert the reinforcing bar with tray, a polygonal inner hole precast pile with improved pull-out resistance also includes a reinforcing partition 3. The reinforcing partition 3 is located inside the first through hole 11 and fixedly connected to the wall of the first through hole 11. By setting the reinforcing partition 3, the overall rigidity and bending resistance of the pile body 1 are enhanced, effectively preventing the pile body 1 from bending and deforming under stress. After the reinforcing cage tray is inserted into the first through hole 11 and connected to the boss 2, concrete is poured into the first through hole 11 to form the reinforcing partition 3. The reinforcing partition 3 separates the residual grout, ensuring that the reinforcing cage tray can be inserted smoothly. At the same time, the reinforcing partition 3 can also enhance the structural stability of the pile body and further improve the horizontal resistance.

[0040] Reference Figure 4 In some embodiments, there may be one or more reinforcing diaphragms 3. In this embodiment, in order to further improve the bending resistance of the pile body 1, there are multiple reinforcing diaphragms 3, and multiple reinforcing diaphragms 3 are spaced apart along the length direction of the pile body 1. The cross-section of the reinforcing diaphragm 3 is square, and the outer peripheral wall of the reinforcing diaphragm 3 is completely fitted with the inner peripheral wall of the first through hole 11 to ensure that the reinforcing diaphragm 3 is in close contact with the hole wall, effectively disperse external forces, improve the overall bending resistance of the pile body 1, and extend the service life.

[0041] Reference Figure 5When the pile 1 is driven into the pile hole, due to the multiple reinforcing partitions 3, air may cause the reinforcing partitions 3 to burst during the pile driving process. Therefore, an exhaust hole 31 is provided through the reinforcing partitions 3 along the length of the pile 1. In some embodiments, there may be one exhaust hole 31 or multiple exhaust holes 31. In this embodiment, there are multiple exhaust holes 31. By providing exhaust holes 31, the gas generated in the pile hole during the pile driving process can be effectively released, preventing the reinforcing partitions 3 from bursting, ensuring the stability and safety of the pile 1, and further improving the construction efficiency and durability of the pile 1.

[0042] In some embodiments, the reinforcement of the steel cage can be prestressed steel bars, steel strands, fiber reinforcement, non-metallic materials, threaded steel bars, or mixed reinforcement; the reinforcing slabs can be cast from concrete.

[0043] Reference Figure 6 In some embodiments, the cross-section of the boss 2 can be rectangular or trapezoidal. In this embodiment, in order to smoothly insert the rebar cage tray into the first through hole 11 and pass through the boss 2, the cross-section of the boss 2 is trapezoidal, and a first space 21 is formed between the two bosses 2. The width of each boss 2 on the side close to the first space 21 gradually decreases. The trapezoidal cross-section of the boss 2 allows the rebar cage tray to have more room to move during the insertion process, so as to ensure that the rebar cage tray passes through the boss 2 smoothly, and the boss 2 limits the rebar cage tray.

[0044] Reference Figure 7 and Figure 8 In order to facilitate the smooth insertion of the pile body 11 into the foundation, the two ends of the pile body 1 are fixedly sleeved with connectors 4. When two adjacent pile bodies 1 are connected, the two connectors 4 can be detachably connected. In some embodiments, the shape of the connectors 4 can be set to correspond to the shape of the pile body 1. In this embodiment, the connectors 4 are rectangular frame structures.

[0045] Reference Figure 7 and Figure 8 Specifically, in order to achieve a detachable connection between the two connectors 4, the precast polygonal inner hole pile with improved pull-out resistance also includes a locking component 5. The locking component 5 includes a locking bolt 51 and a locking nut 52. Each connector 4 has a connecting hole 41 extending through it along the height direction of the pile body 1. In some embodiments, there may be two, four or more connecting holes 41. In this embodiment, there are multiple connecting holes 41 spaced apart along the circumferential direction of the pile body 1. The locking bolt 51 passes through two connecting holes 41 in sequence, and the locking nut 52 is threaded to the locking bolt 51. The locking nut 52 abuts against the bottom wall of the connector 4. The two connectors 4 are connected by the locking bolt 51 and the locking nut 52 to ensure the safety and stability of the project.

[0046] The implementation principle of a polygonal precast pile with improved pull-out resistance in this application embodiment is as follows: two protrusions 2 are fixedly connected in the first through hole 11 of the pile body 1. The steel cage tray is inserted into the first through hole 11 and the angle is further adjusted so that it passes through the protrusions 2 and is fixedly connected to the protrusions 2. Then, concrete is poured in the first through hole 11 to form a reinforced partition 3.

[0047] The two connectors 4 are connected by locking nuts 52 and locking bolts 51 to further ensure the stability of the connection between the two piles 1.

[0048] 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 polygonal pile with internal bore for improving pull-out resistance, characterized in that: The pile includes a pile body (1), which has a first through hole (11) along its length. The first through hole (11) includes a first hole wall (111) and a second hole wall (112) that are parallel to each other. A boss (2) is fixedly connected to both the first hole wall (111) and the second hole wall (112).

2. The polygonal inner-hole precast pile with improved pull-out resistance according to claim 1, characterized in that: It also includes a reinforcing partition (3), which is located inside the first through hole (11) and fixedly connected to the wall of the first through hole (11).

3. A precast polygonal pile with internal bore for improving pull-out resistance according to claim 2, characterized in that: The reinforcing diaphragm (3) is provided in multiple ways, and the reinforcing diaphragm (3) is provided at intervals along the length direction of the pile body (1).

4. A precast polygonal pile with internal bore for improving pull-out resistance according to claim 2, characterized in that: Multiple vent holes (31) are provided through the reinforcing partition (3) along the length of the pile body (1).

5. A precast polygonal pile with internal bore for improving pull-out resistance according to claim 1, characterized in that: The axis of the first through hole (11) coincides with the axis of the pile body (1).

6. A precast polygonal pile with internal bore for improving pull-out resistance according to claim 1, characterized in that: The pile body (1) and the first through hole (11) are configured with the same shape.

7. A precast polygonal pile with internal bore for improving pull-out resistance according to any one of claims 1-6, characterized in that: The pile body (1) is fixedly sleeved with connectors (4) at both ends. When two adjacent pile bodies (1) are connected, the two connectors (4) can be detachably connected.

8. A precast polygonal pile with internal bore for improving pull-out resistance according to claim 7, characterized in that: It also includes a locking component (5), which includes a locking bolt (51) and a locking nut (52). Each of the connecting components (4) has multiple connecting holes (41) through it along the height direction of the pile body (1). The connecting holes (41) are spaced apart along the circumferential direction of the pile body (1). The locking bolt (51) passes through two connecting holes (41) in sequence. The locking nut (52) is threaded to the locking bolt (51) and abuts against the bottom wall of the connecting component (4).

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