Anti-pulling prestressed square pile

Abstract

The utility model relates to the technical field of building pile foundations, in particular to an anti-pulling prestressed square pile which comprises a prefabricated square pile body and a reinforcement cage, the reinforcement cage is prefabricated in the prefabricated square pile body, a connecting assembly is arranged on the prefabricated square pile body and used for fixing the prefabricated square pile body to a bearing platform, and a plurality of anti-pulling conical rods are arranged on the prefabricated square pile body in a sliding mode. A plurality of containing grooves used for containing the uplift cone rods are formed in the prefabricated square pile, the containing grooves correspond to the uplift cone rods in a one-to-one mode, the multiple uplift cone rods are evenly distributed on the periphery of the prefabricated square pile, and sliding parts used for driving the uplift cone rods to slide are arranged on the prefabricated square pile. The square pile has the effect of improving the pulling strength of the square pile.

Description

Technical Field

[0001] This application relates to the field of building pile foundation technology, and in particular to a prestressed square pile with pull-out resistance. Background Technology

[0002] Tension piles are specially designed to resist vertical upward tensile forces. They are usually used in conjunction with pile caps, which are typically formed by pouring concrete on top of the tension pile and allowing it to solidify. The piles primarily rely on the friction between the pile and the soil to withstand axial tensile forces. Tension piles are widely used in various applications, including anti-buoyancy in large basements, anti-uplift in tall buildings, anti-uplift in offshore dock platforms, anchor pile foundations for suspension and cable-stayed bridges, pile foundations for large dock floor slabs, and anchor pile foundations in static load testing.

[0003] Chinese patent CN220414205U discloses a precast prestressed pressure-type tension pile, including a precast concrete pile body, prestressed steel bars, a prestressed tendon pile top anchoring device, and a prestressed tendon pile bottom anchoring device. The prestressed tendon pile top anchoring device and the prestressed tendon pile bottom anchoring device are respectively set at the pile top and the pile bottom to fix the prestressed steel bars in the precast concrete pile body.

[0004] In the process of using the above technology, the pull-out prestress of the precast concrete pile body relies entirely on the friction between the outer surface of the precast concrete pile body and the soil layer. Furthermore, due to the ease of demolding during the precasting process, the surface of the precast concrete pile body is relatively flat and smooth, which results in poor pull-out prestress resistance and has shortcomings. Utility Model Content

[0005] In order to improve the problem that the surface of precast concrete piles is relatively flat and smooth, resulting in poor tensile prestressing effect, this application provides a tensile prestressed square pile.

[0006] This application provides a prestressed square pile with pull-out resistance, employing the following technical solution:

[0007] A type of tension-resistant prestressed square pile includes a precast square pile and a reinforcing cage. The reinforcing cage is precast inside the precast square pile. A connecting assembly is provided on the precast square pile to fix the precast square pile to a pile cap. Multiple tension-resistant cone rods are slidably arranged on the precast square pile. Multiple receiving grooves for accommodating the tension-resistant cone rods are formed on the precast square pile. Each receiving groove corresponds to one tension-resistant cone rod. The multiple tension-resistant cone rods are evenly distributed around the precast square pile. A sliding member for driving the tension-resistant cone rods to slide is provided on the precast square pile.

[0008] By adopting the above technical solution, since the surface of the precast square pile is relatively smooth, workers can easily drive the precast square pile into the deep soil using equipment. Then, the sliding component drives the pull-out cone rod to continuously slide out of the receiving groove, thereby causing the pull-out cone rod to penetrate into the soil deep underground, thus increasing the pull-out prestress of the precast square pile. Then, workers fix the pile cap to the top of the precast square pile using connecting components, thereby improving the pull-out strength of the pile cap and improving the stability of the building above the pile cap.

[0009] Optionally, the sliding member includes a mixed filler composed of highly absorbent resin and cement powder disposed in the receiving groove, and there is a gap between the four sides of the anti-pull-out cone rod and the circumferential inner sidewall of the receiving groove.

[0010] By adopting the above technical solution, the moisture in the soil deep underground diffuses into the receiving tank through the gap between the anti-pull cone rod and the receiving tank, and is absorbed by the super absorbent resin and cement powder. After absorbing water, the super absorbent resin expands and drives the cement powder to push the anti-pull cone rod to the open end of the receiving tank. Part of the anti-pull cone rod will penetrate into the soil deep underground. After absorbing water, the cement powder, together with the super absorbent resin, will seal the gap between the anti-pull cone rod and the receiving tank until the anti-pull cone rod stops moving.

[0011] Optionally, an absorbent cotton cloth is provided on the inner wall of the receiving groove. One end of the absorbent cotton cloth extends to the inner bottom of the receiving groove, and the other end extends to the outside of the precast square pile. A cotton cloth groove for placing the absorbent cotton cloth is opened on the inner wall of the receiving groove.

[0012] By adopting the above technical solution, the absorbent cotton cloth will quickly absorb the water in the soil deep underground into the receiving tank, causing the super absorbent resin to quickly absorb water and expand, pushing the anti-pull-out cone rod into the soil deep underground, which helps to shorten the time it takes for the anti-pull-out cone rod to penetrate into the soil deep underground.

[0013] Optionally, the precast square pile is provided with an anti-detachment plate at the opening of the receiving groove, an anti-detachment protrusion is provided on the anti-pull-out cone rod, and a guide groove is provided on the inner side wall of the receiving groove for the anti-detachment protrusion to slide. The anti-detachment plate is used to abut against the anti-detachment protrusion.

[0014] By adopting the above technical solution, the possibility of the pull-out cone rod slipping out of the receiving groove is reduced, which is conducive to ensuring the stability of the pull-out prestress of the precast square pile.

[0015] Optionally, the connecting assembly includes a shear groove formed at the top of the precast square pile, a plurality of reinforcing bars are provided in the shear groove, the plurality of reinforcing bars are evenly arranged in a downward direction, the ends of the reinforcing bars are precast in the precast square pile, and connecting steel bars are provided on the reinforcing bars, the connecting steel bars are cast in the pile cap.

[0016] By adopting the above technical solution, after the concrete of the foundation is poured into the shear groove, the reinforcing bars and connecting bars are solidified in the concrete of the foundation, thereby strengthening the structural strength between the foundation and the precast square pile, and improving the overall performance between the foundation and the precast square pile.

[0017] Optionally, the inner wall of the shear groove is provided with a plurality of shear teeth, and the plurality of shear teeth are evenly distributed in a downward direction.

[0018] By adopting the above technical solution, the shear groove increases the contact area and consolidation strength between the shear groove and the cast-in-place concrete, further improving the structural strength between the foundation and the precast square pile.

[0019] Optionally, the reinforcing bars include a plurality of inclined pull-out bars, which are inclined towards the centerline of the shear groove in a downward direction, and the lower ends of the inclined pull-out bars are prefabricated in the precast square pile.

[0020] By adopting the above technical solution, the reinforcing bars formed by multiple inclined pull-out bars will increase the pull-out resistance of the pile cap and further improve the structural strength between the pile cap and the precast square pile.

[0021] Optionally, the ends of the pull-out reinforcement bars in the precast square pile are provided with elbow joints, and the precast square pile contains precast annular reinforcement bars, with the elbow joints located on the annular reinforcement bars.

[0022] By adopting the above technical solution, it is beneficial to improve the structural strength between the pull-out reinforcement and the precast square pile.

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

[0024] 1. Because the surface of the precast square pile is relatively smooth, workers can easily drive the precast square pile into the deep soil using equipment. Then, the sliding component drives the pull-out cone rod to slide out of the receiving groove, so that the pull-out cone rod penetrates into the soil deep underground, thereby increasing the pull-out prestress of the precast square pile. Then, workers fix the pile cap to the top of the precast square pile using connecting components, thereby improving the pull-out strength of the pile cap and improving the stability of the building above the pile cap.

[0025] 2. Moisture in the soil deep underground diffuses into the receiving tank through the gap between the pull-out cone rod and the receiving tank, and is absorbed by the super absorbent resin and cement powder. After absorbing water, the super absorbent resin expands and drives the cement powder to push the pull-out cone rod towards the open end of the receiving tank. Part of the pull-out cone rod will penetrate into the soil deep underground. After absorbing water, the cement powder, together with the super absorbent resin, will seal the gap between the pull-out cone rod and the receiving tank until the pull-out cone rod stops moving.

[0026] 3. After the concrete for the foundation is poured into the shear groove, the reinforcing bars and connecting bars are solidified in the concrete of the foundation, thereby strengthening the structural strength between the foundation and the precast square pile, and improving the overall performance between the foundation and the precast square pile. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0028] Figure 2 This is a partial sectional view in the embodiments of this application used to illustrate the positional relationship between the reinforcing cage, the shear groove, and the pull-out cone rod.

[0029] Figure 3 yes Figure 2 Enlarged view of part A in the middle.

[0030] Explanation of reference numerals in the attached drawings: 1. Foundation; 2. Precast square pile; 3. Reinforcing cage; 4. Connecting component; 41. Shear groove; 42. Reinforcing bar; 421. Pull-out bar; 43. Connecting bar; 5. Pull-out cone rod; 6. Receiving groove; 7. Sliding component; 71. Mixed filler; 8. Absorbent cotton cloth; 9. Cotton cloth groove; 10. Anti-detachment plate; 11. Anti-detachment protrusion; 12. Guide groove; 13. Shear tooth groove; 14. Bend joint; 15. Ring reinforcement. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0032] This application discloses a pull-out prestressed square pile.

[0033] Reference Figure 1 A type of prestressed square pile with pull-out resistance includes a precast square pile 2 and a reinforcing cage 3. The precast square pile 2 is precast from concrete and has a regular polygonal cross-section. The reinforcing cage 3 is precast inside the precast square pile 2. A connecting component 4 is arranged on the precast square pile 2. The connecting component 4 is used to fix the precast square pile 2 to the pile cap 1.

[0034] Reference Figure 1 , Figure 2 and Figure 3 Multiple horizontally oriented anti-pull-out cone rods 5 are slidably arranged on the precast square pile 2. Multiple receiving grooves 6 are provided on the precast square pile 2 to accommodate the anti-pull-out cone rods 5. The end of the anti-pull-out cone rod 5 facing away from the precast square pile 2 is a pointed end. The receiving grooves 6 correspond one-to-one with the anti-pull-out cone rods 5. Multiple anti-pull-out cone rods 5 are evenly distributed around the precast square pile 2. Sliding components 7 that drive the anti-pull-out cone rods 5 to slide are arranged on the precast square pile 2.

[0035] Reference Figure 1 , Figure 2 and Figure 3The sliding component 7 includes a mixed filler 71 composed of highly absorbent resin and cement powder, which is filled in the receiving groove 6. There is a gap between the four sides of the anti-pull-out cone rod 5 and the inner side of the receiving groove 6. A water-absorbing cotton cloth 8 is pasted on the inner side of the receiving groove 6. The water-absorbing cotton cloth 8 is made of a material with good water absorption performance. One end of the water-absorbing cotton cloth 8 extends into the mixed filler 71 at the bottom of the receiving groove 6, and the other end extends to the outside of the precast square pile 2.

[0036] Reference Figure 1 , Figure 2 and Figure 3 The inner wall of the receiving groove 6 is provided with a cotton cloth groove 9 for placing the absorbent cotton cloth 8. The opening of the receiving groove 6 of the precast square pile 2 is bolted with an anti-detachment plate 10. The anti-pull-out cone rod 5 is integrally formed with an anti-detachment protrusion 11. The inner wall of the receiving groove 6 is provided with a guide groove 12 for the anti-detachment protrusion 11 to slide. The anti-detachment plate 10 is used to abut against the anti-detachment protrusion 11.

[0037] Since the precast square pile 2 is made of precast concrete, the surface of the precast square pile 2 is relatively smooth. Workers use pile driving equipment to drive the precast square pile 2 into the designed depth of soil. A small part of the water in the soil deep underground diffuses into the interior of the receiving groove 6 through the gap between the anti-pull cone rod 5 and the receiving groove 6. Through the siphon effect, most of the water in the soil deep underground is absorbed by the water-absorbing cotton cloth 8 and drawn into the receiving groove 6 by the water-absorbing cotton cloth 8.

[0038] The water in the receiving tank 6 is absorbed by the superabsorbent resin and cement powder. After absorbing water, the superabsorbent resin expands continuously and drives the cement powder to push the pull-out cone 5 towards the open end of the receiving tank 6. The tip of the sliding pull-out cone 5 will penetrate into the soil deep underground. After absorbing water, the cement powder, together with the superabsorbent resin, will seal the gap between the pull-out cone 5 and the receiving tank 6, causing the pressure inside the receiving tank 6 to increase continuously. This increases the thrust of the pull-out cone 5 into the soil deep underground until the pull-out cone 5 stops moving. The cement powder after absorbing water will solidify and prevent the pull-out cone 5 from moving back.

[0039] Reference Figure 1 , Figure 2 and Figure 3 The connecting component 4 includes a shear groove 41 vertically opened at the top of the precast square pile 2. Multiple shear grooves 13 are opened on the inner side wall of the shear groove 41. The multiple shear grooves 13 are evenly distributed in the direction from top to bottom. Multiple reinforcing bars 42 are arranged in the shear groove 41. The multiple reinforcing bars 42 are evenly arranged in the direction from top to bottom. Connecting bars 43 are tied on the reinforcing bars 42. The end of the connecting bar 43 extending out of the shear groove 41 will be cast into the pile cap 1.

[0040] Reference Figure 1 , Figure 2 and Figure 3The reinforcing bar 42 includes multiple inclined tension bars 421. The tension bars 421 are inclined towards the center line of the shear groove 41 in a downward direction. The lower end of the inclined tension bars 421 is precast in the precast square pile 2. The end of the tension bars 421 in the precast square pile 2 is integrally formed with a bend joint 14. The precast square pile 2 has a ring steel bar 15 precast in it, and the bend joint 14 is tied to the ring steel bar 15.

[0041] Workers tied the connecting steel bars 43 to the reinforcing bars 42, then erected the formwork for pouring the foundation 1, and then poured concrete. The poured concrete filled the shear groove 41. After the poured concrete solidified, the reinforcing bars 42 and the connecting steel bars 43 were both surrounded by concrete, so that the top of the precast square pile 2 and the foundation 1 formed a whole, thereby improving the pull-out strength of the precast square pile 2 and the foundation 1.

[0042] The implementation principle of the prestressed square pile with pull-out resistance in this application embodiment is as follows: Since the precast square pile 2 is made of precast concrete, the surface of the precast square pile 2 is relatively smooth. Workers drive the precast square pile 2 into the designed depth of soil using pile driving equipment. A small part of the water in the soil deep underground diffuses into the interior of the receiving groove 6 through the gap between the pull-out cone rod 5 and the receiving groove 6. Through the siphon effect, most of the water in the soil deep underground is absorbed by the water-absorbing cotton cloth 8 and drawn into the receiving groove 6 by the water-absorbing cotton cloth 8.

[0043] The water in the receiving tank 6 is absorbed by the superabsorbent resin and cement powder. After absorbing water, the superabsorbent resin expands continuously and drives the cement powder to push the pull-out cone 5 towards the open end of the receiving tank 6. The tip of the sliding pull-out cone 5 will penetrate into the soil deep underground. After absorbing water, the cement powder, together with the superabsorbent resin, will seal the gap between the pull-out cone 5 and the receiving tank 6, causing the pressure inside the receiving tank 6 to increase continuously. This increases the thrust of the pull-out cone 5 into the soil deep underground until the pull-out cone 5 stops moving. The cement powder after absorbing water will solidify and prevent the pull-out cone 5 from moving back.

[0044] Workers tied the connecting steel bars 43 to the reinforcing bars 42, then erected the formwork for pouring the foundation 1, and then poured concrete. The poured concrete filled the shear groove 41. After the poured concrete solidified, the reinforcing bars 42 and the connecting steel bars 43 were both surrounded by concrete, so that the top of the precast square pile 2 and the foundation 1 formed a whole, thereby improving the pull-out strength of the precast square pile 2 and the foundation 1.

[0045] 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 pull-out prestressed square pile, characterized in that: The utility model provides a prefabricated square pile (2) and reinforcement cage (3), reinforcement cage (3) prefabricated in prefabricated square pile (2), prefabricated square pile (2) is provided with connecting assembly (4) on, connecting assembly (4) is used for fixing prefabricated square pile (2) on bearing platform (1), prefabricated square pile (2) is provided with a plurality of anti -pulling cone pole (5) slidingly, prefabricated square pile (2) is provided with a plurality of accommodating groove (6) for accommodating anti -pulling cone pole (5), accommodating groove (6) correspond with anti -pulling cone pole (5), a plurality of anti -pulling cone pole (5) evenly distributed in the four of prefabricated square pile (2), prefabricated square pile (2) is provided with the sliding of driving anti -pulling cone pole (5) sliding member (7).

2. The uplift prestressed square pile according to claim 1, characterized in that: The sliding member (7) includes a mixed filler (71) composed of high absorption resin and cement powder arranged in the accommodating groove (6), and a gap exists between the circumferential side wall of the anti -pulling cone pole (5) and the inner circumferential side wall of the accommodating groove (6).

3. The uplift-prestressed square pile according to claim 2, characterized in that: The inner side wall of the accommodating groove (6) is provided with a water-absorbing cotton cloth (8), one end of the water-absorbing cotton cloth (8) extends to the inner bottom of the accommodating groove (6), and the other end extends to the outside of the prefabricated square pile (2), and a cotton cloth groove (9) is formed in the inner side wall of the accommodating groove (6) for placing the water-absorbing cotton cloth (8).

4. The uplift-prestressed square pile according to claim 2, characterized in that: The open end of the accommodating groove (6) of the prefabricated square pile (2) is provided with a anti -falling plate (10), the anti -pulling cone pole (5) is provided with an anti -falling convex block (11), the inner side wall of the accommodating groove (6) is provided with a guide groove (12) for the sliding of the anti -falling convex block (11), and the anti -falling plate (10) is used for abutting against the anti -falling convex block (11).

5. The uplift-prestressed square pile according to claim 1, characterized in that: The connecting assembly (4) includes a shear groove (41) formed in the top of the prefabricated square pile (2), a plurality of reinforcing bars (42) are arranged in the shear groove (41), and the reinforcing bars (42) are evenly arranged in the downward direction, the end of the reinforcing bar (42) is prefabricated in the prefabricated square pile (2), and a connecting steel bar (43) is arranged on the reinforcing bar (42), and the connecting steel bar (43) is poured in the bearing platform (1).

6. The uplift-prestressed square pile according to claim 5, characterized in that: A plurality of shear tooth grooves (13) are formed in the inner side wall of the shear groove (41), and the shear tooth grooves (13) are evenly distributed in the downward direction.

7. The uplift-prestressed square pile according to claim 5, characterized in that: The reinforcing bar (42) includes a plurality of inclined anti -pulling bars (421), the anti -pulling bars (421) are inclined to the center line of the shear groove (41) in the downward direction, and the lower end of the anti -pulling bar (421) is prefabricated in the prefabricated square pile (2).

8. The uplift-prestressed square pile according to claim 7, characterized in that: The end of the anti -pulling bar (421) in the prefabricated square pile (2) is provided with a bend joint (14), and the prefabricated square pile (2) is prefabricated with a ring-shaped reinforcing bar (15), and the bend joint (14) is arranged on the ring-shaped reinforcing bar (15).

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