Uplift cast-in-place pile

Abstract

The utility model provides an anti-pulling cast-in-place pile in the technical field of building construction. The anti-pulling cast-in-place pile comprises a reinforcement cage, the reinforcement cage comprises a plurality of longitudinal bars, a plurality of sets of fixing rings are arranged on the outer side of the reinforcement cage, each fixing ring comprises a plurality of stirrups, a plurality of positioning rings are arranged in the reinforcement cage, the positioning rings and the reinforcement cage are coaxially arranged, and the positioning rings are connected with an anti-pulling structure. The first blocking rod in lap joint with the fixing ring rotates, the length, extending out of the reinforcement cage, of the first blocking rod is increased in the rotating process, finally, the first blocking rod penetrates into the inner wall of the drilled hole, and the pulling resistance of the cast-in-place pile is improved through resistance between the first blocking rod and the inner wall of the drilled hole; after the reinforcement cage enters the drill hole, the second blocking rod rotates and opens under the action of gravity, the end, away from the reinforcement cage, of the second blocking rod is in lap joint with the inner wall of the drill hole, the second blocking rod is embedded into the inner wall of the drill hole when the cast-in-place pile is subjected to external force, and the anti-pulling capacity of the cast-in-place pile is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to an anti-pullout cast-in-place pile. Background Art

[0002] A cast-in-place pile is a pile foundation that involves drilling a long, cylindrical hole in the ground, then pouring concrete into it and pre-embedding the pole tower and foundation connectors. Cast-in-place piles are widely used in construction due to their advantages, including zero vibration, no soil extrusion, low noise, and suitability for use in densely built-up urban areas.

[0003] The bearing capacity of pullout piles comes entirely from the lateral friction between the pile and the surrounding soil. Traditional cast-in-place concrete piles are connected to the upper building foundation via main reinforcement at the pile top, providing pullout resistance. As the load on the pile top increases, the pile top gradually moves upward, and the lateral friction gradually takes effect from shallow to deep. However, in soft soils like volcanic ash foundations, the soil is prone to slippage, which reduces the friction on the pile side and reduces the pullout performance of the pullout piles.

[0004] Therefore, in view of the above problems, a pull-out resistant cast-in-place pile is proposed to solve the above problems. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the utility model develops an anti-pullout cast-in-place pile. The utility model can improve the anti-pullout performance of the anti-pullout cast-in-place pile.

[0006] The technical solution of the utility model for solving the technical problem is: an anti-pullout cast-in-place pile, including a steel cage, the steel cage including multiple longitudinal bars, multiple groups of fixing rings are arranged on the outside of the steel cage, the fixing rings include multiple stirrups, and multiple positioning rings are arranged inside the steel cage. The positioning rings are coaxially arranged with the steel cage, and the positioning rings are connected to the anti-pullout structure.

[0007] The steel cage is composed of multiple longitudinal bars and multiple stirrups. Multiple positioning rings are set inside the steel cage. The pull-out structure is connected through the positioning rings to improve the pull-out strength of the entire cast-in-place pile.

[0008] Preferably, the pull-out resistant structure includes reinforcing bars, and multiple reinforcing bars are evenly arranged inside the steel cage. The reinforcing bars are arranged horizontally, one end of the reinforcing bar is connected to the positioning ring, and the end of the reinforcing bar away from the positioning ring is connected to the steel cage, and the positioning ring is evenly connected to multiple reinforcing bars.

[0009] The positioning ring is fixed by arranging multiple reinforcing bars connected to the positioning ring. At the same time, the multiple reinforcing bars improve the structural strength of the steel cage and prevent the steel cage from deformation.

[0010] Preferably, the pull-out resistant structure further includes a connecting rod and a first blocking rod. The connecting rod is arranged in the positioning ring. The connecting rod is rotated to set a plurality of first blocking rods. The rotation axis of the first blocking rod is perpendicular to the connecting rod. The first blocking rod is located between two adjacent groups of fixed rings. The end of the first blocking rod away from the positioning ring extends out of the steel cage, and the first blocking rod is overlapped on the fixed ring.

[0011] The connecting rod is passed through the positioning ring, and multiple first blocking rods are rotatably arranged on the outside of the connecting rod. As the connecting rod moves up and down in the positioning ring, the first blocking rod overlapped on the fixing ring rotates. During the rotation, the length of the first blocking rod extending out of the steel cage increases, and finally the first blocking rod penetrates into the inner wall of the borehole. The connecting rod is then fixed, and the pull-out resistance of the cast-in-place pile is improved by the resistance between the first blocking rod and the inner wall of the borehole. At the same time, the fixing ring supports the first blocking rod, limits the rotation direction of the first blocking rod, and forms a self-locking function together with the inner wall of the borehole and the connecting rod.

[0012] Preferably, the anti-pullout structure further includes a first mounting platform and a first mounting groove. A plurality of mounting platforms are evenly arranged on the outside of the connecting rod. The mounting platforms are provided with a first mounting groove. A first blocking rod is rotatably arranged in the first mounting groove.

[0013] Preferably, the pull-out resistant structure further includes a second mounting platform, a second mounting groove, a second blocking rod and a limit plate. A plurality of second mounting platforms are evenly arranged on the outside of the steel cage. The second mounting platform is provided with a second mounting groove. A second blocking rod is rotatably arranged in the second mounting groove. The rotation axis of the second blocking rod is perpendicular to the steel cage. A limit plate is provided below the second mounting groove.

[0014] The second blocking rod is rotatably arranged in the second installation groove. After the steel cage enters the borehole, the second blocking rod is rotated and opened by the action of gravity. The second blocking rod and the outer side of the steel cage form a V shape. The end of the second blocking rod away from the steel cage is overlapped on the inner wall of the borehole. When the bored pile is subjected to external force, the second blocking rod is embedded in the inner wall of the borehole to improve the pull-out resistance of the bored pile. The limit plate located below the second installation groove prevents the second blocking rod from rotating downward during the lifting of the steel cage.

[0015] Preferably, a plurality of lifting rings are evenly arranged on the steel cage, a mounting ring is provided at the upper end of the connecting rod, and an adjusting rod is passed through the mounting ring.

[0016] By setting up multiple lifting rings, it is convenient to lift on site. By setting up adjusting rods and mounting rings, it is convenient to adjust the height of the connecting rod. When the connecting rod reaches the specified height, the connecting rod is fixed, and then the adjusting rod is removed and the drilled hole is poured to form a cast-in-place pile.

[0017] The effects provided in the content of the utility model are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solution has the following advantages or beneficial effects:

[0018] The connecting rod is passed through the positioning ring, and a plurality of first blocking rods are rotatably arranged on the outer side of the connecting rod. As the connecting rod moves up and down in the positioning ring, the first blocking rods overlapped on the fixing ring rotate. During the rotation process, the length of the first blocking rods extending out of the steel cage increases. Finally, the first blocking rods penetrate into the inner wall of the borehole, and then the connecting rod is fixed. The pull-out resistance of the cast-in-place pile is improved by the resistance between the first blocking rods and the inner wall of the borehole.

[0019] The fixing ring supports the first blocking rod, limits the rotation direction of the first blocking rod, and forms a self-locking function together with the inner wall of the drill hole and the connecting rod;

[0020] The second barrier rod is rotatably arranged in the second installation groove. After the steel cage enters the borehole, the second barrier rod is rotated and opened by the action of gravity. The second barrier rod and the outer side of the steel cage form a V shape. The end of the second barrier rod away from the steel cage is overlapped on the inner wall of the borehole. When the bored pile is subjected to external force, the second barrier rod is embedded in the inner wall of the borehole, thereby improving the pull-out resistance of the bored pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0022] Figure 1 This is a schematic structural diagram of the utility model.

[0023] Figure 2 It is a cross-sectional schematic diagram of the present utility model.

[0024] Figure 3 For this utility model Figure 1 A magnified schematic diagram of the structure in the middle.

[0025] Figure 4 For this utility model Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0026] In the figure, 1. steel cage; 2. longitudinal reinforcement; 3. fixing ring; 4. stirrups; 5. positioning ring; 6. reinforcing ribs; 7. connecting rod; 8. first blocking rod; 9. first mounting platform; 10. first mounting groove; 11. second mounting platform; 12. second mounting groove; 13. second blocking rod; 14. limit plate; 15. lifting ring; 16. mounting ring; 17. adjusting rod. DETAILED DESCRIPTION

[0027] To clearly illustrate the technical features of this solution, the present invention is described in detail below using specific embodiments and accompanying drawings. The following disclosure provides numerous different embodiments or examples for implementing various configurations of the present invention. To simplify the disclosure of the present invention, the following descriptions focus on components and configurations of specific examples. Furthermore, the present invention may repeat reference numerals and / or letters across different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or configurations discussed. It should be noted that the components illustrated in the accompanying drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the present invention. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] like Figures 1 to 4 As shown, a pull-out resistant cast-in-place pile includes a steel cage 1, which includes multiple longitudinal bars 2. Multiple sets of fixing rings 3 are arranged outside the steel cage 1. The fixing rings 3 include multiple stirrups 4. Multiple positioning rings 5 ​​are arranged inside the steel cage 1. The positioning rings 5 ​​are coaxially arranged with the steel cage 1 and connect the pull-out resistant structure. The steel cage 1 is formed by multiple longitudinal bars 2 and multiple stirrups 4. Multiple positioning rings 5 ​​are arranged inside the steel cage 1. The positioning rings 5 ​​connect the pull-out resistant structure, thereby improving the pull-out strength of the entire cast-in-place pile.

[0029] The pull-out resistant structure includes reinforcing ribs 6, which are evenly arranged inside the steel cage 1. The ribs 6 are arranged horizontally, with one end of the rib 6 connected to the positioning ring 5 and the end of the rib 6 away from the positioning ring 5 connected to the steel cage 1. The positioning ring 5 is evenly connected to the multiple reinforcing ribs 6. By providing multiple reinforcing ribs 6 connected to the positioning ring 5, the positioning ring 5 is fixed, and the multiple reinforcing ribs 6 increase the structural strength of the steel cage 1 and prevent deformation of the steel cage 1.

[0030] The pullout-resistant structure also includes a connecting rod 7 and a first blocking rod 8. The connecting rod 7 is disposed within the positioning ring 5. Multiple first blocking rods 8 are rotatably attached to the connecting rod 7. The first blocking rods 8 rotate perpendicularly to the connecting rod 7. The first blocking rods 8 are located between two adjacent sets of fixing rings 3. The ends of the first blocking rods 8 facing away from the positioning ring 5 extend out of the reinforcement cage 1 and overlap the fixing rings 3. The connecting rod 7 passes through the positioning ring 5. Multiple first blocking rods 8 are rotatably attached to the outer side of the connecting rod 7. As the connecting rod 7 moves up and down within the positioning ring 5, the first blocking rods 8 overlap the fixing rings 3 and rotate. During this rotation, the length of the first blocking rods 8 extending out of the reinforcement cage 1 increases, eventually penetrating the inner wall of the borehole, securing the connecting rod 7. The resistance between the first blocking rods 8 and the inner wall of the borehole improves the pullout resistance of the cast-in-place pile. The fixing rings 3 support the first blocking rods 8, restricting their rotational direction and forming a self-locking effect with the inner wall of the borehole and the connecting rod 7.

[0031] The anti-pullout structure also includes a first mounting platform 9 and a first mounting groove 10. A plurality of first mounting platforms 9 are evenly arranged on the outside of the connecting rod 7. The first mounting platform 9 is provided with a first mounting groove 10. The first blocking rod 8 is rotatably arranged in the first mounting groove 10.

[0032] The anti-pullout structure also includes a second mounting platform 11, a second mounting slot 12, a second blocking rod 13, and a limit plate 14. Multiple second mounting platforms 11 are evenly arranged on the outside of the steel cage 1. The second mounting platforms 11 are provided with second mounting slots 12. Second blocking rods 13 are rotatably arranged in the second mounting slots 12. The rotation axis of the second blocking rod 13 is perpendicular to the steel cage 1. A limit plate 14 is provided below the second mounting slots 12. The second blocking rod 13 is rotatably arranged in the second mounting slots 12. After the steel cage 1 enters the borehole, the second blocking rod 13 rotates and opens under the action of gravity. The second blocking rod 13 forms a V-shape with the outside of the steel cage 1. The end of the second blocking rod 13 away from the steel cage 1 overlaps the inner wall of the borehole. When the cast-in-place pile is subjected to external force, the second blocking rod 13 embeds into the inner wall of the borehole, thereby improving the anti-pullout ability of the cast-in-place pile. The limit plate 14 located below the second mounting slots 12 prevents the second blocking rod 13 from rotating downward during the hoisting process of the steel cage 1.

[0033] A plurality of lifting rings 15 are evenly arranged on the steel cage 1, and a mounting ring 16 is provided at the upper end of the connecting rod 7, and an adjusting rod 17 is passed through the mounting ring 16. The plurality of lifting rings 15 facilitates on-site construction and lifting, and the adjusting rod 17 and the mounting ring 16 facilitate adjustment of the height of the connecting rod 7. When the connecting rod 7 reaches the specified height, the connecting rod 7 is fixed, and then the adjusting rod 17 is removed, and the drilled hole is poured to form a cast-in-place pile.

[0034] Working principle: After the steel cage 1 is hoisted into the borehole, the second blocking rod 13 rotates downward under the action of gravity. The second blocking rod 13 forms a V-shape with the outer side of the steel cage 1. The end of the second blocking rod 13 away from the steel cage 1 is overlapped on the inner wall of the borehole. Resistance is formed between the second blocking rod 13 and the inner wall of the borehole, which improves the pull-out resistance of the bored pile. The rotation setting of the second blocking rod 13 does not affect the process of the steel cage 1 entering the borehole. At the same time, the limit plate 14 limits the downward rotation of the second blocking rod 13. After the steel cage 1 is installed, the height of the connecting rod 7 is adjusted to extend the first blocking rod 8 and insert it into the inner wall of the borehole. The pull-out resistance of the bored pile is further improved through the interaction between the first blocking rod 8 and the inner wall of the borehole.

[0035] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it does not limit the scope of protection of the utility model. On the basis of the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the utility model.

Claims

1. A pull-out resistant cast-in-place pile, comprising a steel cage (1), characterized in that: The steel cage (1) comprises a plurality of longitudinal bars (2), a plurality of sets of fixing rings (3) are arranged outside the steel cage (1), the fixing rings (3) comprise a plurality of stirrups (4), a plurality of positioning rings (5) are arranged inside the steel cage (1), the positioning rings (5) are arranged coaxially with the steel cage (1), and the positioning rings (5) are connected to the pull-out resistant structure; The pull-out resistant structure comprises a reinforcing rib (6), a plurality of reinforcing ribs (6) are evenly arranged inside the steel cage (1), the reinforcing rib (6) is arranged horizontally, one end of the reinforcing rib (6) is connected to the positioning ring (5), the end of the reinforcing rib (6) away from the positioning ring (5) is connected to the steel cage (1), and the positioning ring (5) evenly connects the plurality of reinforcing ribs (6); The anti-pullout structure further comprises a connecting rod (7) and a first blocking rod (8), wherein the connecting rod (7) is arranged in the positioning ring (5), and the connecting rod (7) is rotatably arranged with a plurality of first blocking rods (8), wherein the rotation axis of the first blocking rod (8) is perpendicular to the connecting rod (7), and the first blocking rod (8) is located between two adjacent groups of fixing rings (3), and an end of the first blocking rod (8) away from the positioning ring (5) extends out of the steel cage (1), and the first blocking rod (8) is overlapped on the fixing ring (3); The anti-pulling structure further comprises a second mounting platform (11), a second mounting groove (12), a second blocking rod (13) and a limiting plate (14); a plurality of second mounting platforms (11) are evenly arranged outside the steel cage (1); the second mounting platform (11) is provided with a second mounting groove (12); a second blocking rod (13) is rotatably arranged in the second mounting groove (12); a rotation axis of the second blocking rod (13) is perpendicular to the steel cage (1); and a limiting plate (14) is arranged below the second mounting groove (12).

2. The pull-out resistant cast-in-place pile according to claim 1, characterized in that: The anti-pulling structure further comprises a first mounting platform (9) and a first mounting groove (10); a plurality of first mounting platforms (9) are evenly arranged outside the connecting rod (7); the first mounting platform (9) is provided with a first mounting groove (10); and a first blocking rod (8) is rotatably arranged in the first mounting groove (10).

3. The pull-out resistant cast-in-place pile according to claim 1 is characterized in that: A plurality of lifting rings (15) are evenly arranged on the steel cage (1), a mounting ring (16) is arranged at the upper end of the connecting rod (7), and an adjusting rod (17) is inserted into the mounting ring (16).

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