Connecting structure of tubular pile and bearing platform

Abstract

The utility model relates to the technical field of building pile foundation engineering construction, and discloses a tubular pile and bearing platform connecting structure which comprises a tubular pile, a bearing platform and anchoring ribs, an end plate is coaxially arranged at the top end of the tubular pile, and a through hole for concrete pouring is formed in the middle of the end plate; a plurality of anchoring holes are distributed in the portion, located in the hollow cavity of the pipe pile, of the end plate in the circumferential direction of the end plate, the anchoring ribs correspond to the anchoring holes in a one-to-one mode and penetrate through the anchoring holes in the vertical direction, and fixing pieces for fixing the anchoring ribs are arranged on the end plate. The connecting structure has the effect of improving the connecting strength between the pipe pile and the bearing platform.

Description

Technical Field

[0001] The present application relates to the technical field of building pile foundation construction, and in particular to a connection structure between a pipe pile and a cap. Background Art

[0002] Pile foundation is a form of foundation in construction engineering, which is used to transfer the load of the building to a deeper and more stable stratum to support the superstructure. It mainly consists of two parts: pipe piles and caps.

[0003] The cap serves as the force transmission body between the pipe pile and the upper structure. The connection direction between the cap and the pipe pile is usually constructed by reinforced concrete core pouring, and the top of the pipe pile is directly buried in the cap. However, the buried length needs to be accurately calculated. If the buried length is too short, it cannot meet the tensile strength requirements, and if the buried length is too long, it will increase the investment cost.

[0004] During actual construction, in order to ensure that there is enough friction between the core concrete and the inner wall of the pipe pile to meet the pulling effect, the concrete core length often needs to reach more than 2.5 meters, which not only increases the difficulty of construction, but also makes it difficult to stably control the construction quality. Due to unstable quality problems, the connection strength cannot meet the design requirements, which has a great impact on the overall structural stability of the pile foundation. Utility Model Content

[0005] In order to improve the connection strength between the pipe pile and the cap, the present application provides a connection structure between the pipe pile and the cap.

[0006] The present application provides a connection structure between a pipe pile and a cap using the following technical solution:

[0007] A connection structure between a pipe pile and a cap comprises a pipe pile, a cap and anchoring bars, wherein an end plate is coaxially arranged at the top end of the pipe pile, and a through hole for concrete pouring is opened in the middle of the end plate, and a portion of the end plate located in a hollow chamber of the pipe pile is provided with a plurality of anchoring holes distributed along its circumference, the anchoring bars correspond to the anchoring holes one by one, and the anchoring holes are penetrated vertically, and fixing parts for fixing the anchoring bars are arranged on the end plate.

[0008] By adopting the above technical solution, an end plate with a through hole is set at the top of the pipe pile, and the anchoring bar is set through the anchoring hole on the end plate, and the anchoring bar is fixed to the end plate by a fixing piece. Subsequently, concrete is poured through the through hole in the middle of the end plate to fill the hollow chamber of the pipe pile with concrete, thereby improving the connection strength between the pipe pile and the cap. This connection method can effectively transfer the load on the cap to the pipe pile, and then disperse it to a deeper stratum, ensuring the stability and safety of the pile foundation.

[0009] Optionally, a stiffening plate that fits the inner wall of the pipe pile is provided at the bottom of the end plate, and a plurality of stiffening plates are distributed along the circumference of the inner wall of the pipe pile, and the stiffening plates are staggered with the anchor holes.

[0010] By adopting the above technical solution, the provision of the stiffening plate further enhances the bearing capacity of the end plate, prevents the end plate from being deformed or damaged during the stress process, and thus improves the reliability of the connection.

[0011] Optionally, the fixing member is a high-strength nut threadedly mounted on the anchor bar, one high-strength nut is disposed at the top and bottom of the end plate, and the high-strength nut is disposed in abutment with the end plate.

[0012] By adopting the above technical solution, each anchor bar is equipped with such a high-strength nut at the top and bottom of the end plate, and the high-strength nut is tightly in contact with the end plate. This design makes the anchor bar more firmly fixed, can effectively resist the influence of external forces, and ensure the long-term stability of the connection.

[0013] Optionally, a gasket is provided between the high-strength nut and the end plate, and the gasket is sleeved on the anchor bar.

[0014] By adopting the above technical solution, the setting of the gasket can reduce the possibility of high-strength nuts causing damage to the end plate during the tightening process, and these gaskets are sleeved on the anchor bars, which not only protects the integrity of the end plate, but also further improves the fixing effect of the anchor bars.

[0015] Optionally, a plurality of connecting steel bars are arranged circumferentially on the top of the end plate, the top end of each connecting steel bar is arranged in a hook shape, and the connecting steel bars are buried in the base through concrete pouring.

[0016] By adopting the above technical solution, the hook-shaped connecting steel bars are poured into the cap through concrete. The hooking method can significantly enhance the bonding force between the pipe pile and the cap, thereby improving the overall pull-out resistance of the pile foundation.

[0017] Optionally, the bottom of the support platform is designed to have an expanded bottom, and the bottom size of the support platform is larger than the top size of the support platform.

[0018] By adopting the above technical solution, the expanded bottom design of the pedestal bottom can increase the contact area between the pedestal and the surrounding soil, thereby improving the bearing capacity of the pedestal; at the same time, the expanded bottom pedestal can better disperse the load transmitted from the pipe piles and reduce the stress concentration at the connection.

[0019] Optionally, after the anchor bars are fixed inside the pipe pile, micro-expansive cement is poured.

[0020] By adopting the above technical solution, micro-expansive cement is poured inside the pipe pile to increase its bonding force and friction with the inner hole of the pipe pile, thereby improving the pull-out resistance of the pile foundation; at the same time, the micro-expansive cement fixes a number of anchor bars, so that the steel bars at the upper ends of the anchor bars are connected to the cap, which can further improve the connection strength between the cap and the pipe pile.

[0021] Optionally, a sealing cushion layer is cast at the connection between the pipe pile and the ground, and a waterproof membrane cloth is laid on the sealing cushion layer.

[0022] By adopting the above technical solution, the combination of the waterproof membrane cloth and the sealing cushion layer can prevent water from penetrating into the ground from the connection between the base and the pipe pile, thereby reducing the possibility of loosening of the soil in the pipe pile hole, thereby improving the durability of the connection between the pipe pile and the base.

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

[0024] 1. An end plate with a through hole is set at the top of the pipe pile, and the anchor bar is set through the anchor hole on the end plate, and the anchor bar is fixed to the end plate with a fixing. Subsequently, concrete is poured through the through hole in the middle of the end plate to fill the hollow chamber of the pipe pile with concrete, thereby improving the connection strength between the pipe pile and the cap. This connection method can effectively transfer the load of the cap to the pipe pile, and then disperse it to a deeper stratum, ensuring the stability and safety of the pile foundation;

[0025] 2. The setting of the stiffening plate further enhances the bearing capacity of the end plate, prevents the end plate from deformation or damage during the stress process, and thus improves the reliability of the connection;

[0026] 3. Each anchor bar is equipped with such a high-strength nut at the top and bottom of the end plate, and the high-strength nut is in close contact with the end plate. This design makes the anchor bar more firmly fixed, can effectively resist the influence of external forces, and ensure the long-term stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the overall structure regarding the connection relationship between the pipe piles, the cap and the anchor bars in the embodiment of the present application.

[0028] Figure 2 It is a structural schematic diagram that reflects the positional relationship between the connecting steel bars, stiffening plates and anchor holes arranged on the end plate in an embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view of the overall structure regarding the connection relationship between the pipe piles, the cap and the connecting steel bars in the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Pipe piles; 2. Capping platform; 3. Anchoring bars; 4. End plates; 41. Through holes; 42. Anchoring holes; 43. Stiffening plates; 44. Connecting steel bars; 5. Fasteners; 51. High-strength nuts; 6. Gaskets; 7. Sealing cushions; 8. Waterproof membrane cloth. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] The embodiment of the present application discloses a connection structure between a pipe pile and a cap.

[0034] Reference Figures 1 to 3 A connection structure between a pipe pile and a cap includes a pipe pile 1, a cap 2 and anchoring bars 3. An end plate 4 is coaxially fixedly arranged at the top of the pipe pile 1. A through hole 41 for concrete pouring is coaxially opened in the middle of the end plate 4. In this embodiment, the concrete poured into the pipe pile is commercially available micro-expansive cement. The part of the end plate 4 located in the hollow chamber of the pipe pile 1 is provided with a plurality of anchoring holes 42 corresponding to the anchoring bars 3 along its own circumference, and the anchoring bars 3 are vertically inserted into the anchoring holes 42. A fixing piece 5 for fixing the anchoring bars 3 is provided on the end plate 4. The bottom of the cap 2 in this embodiment is designed with an expanded bottom, and the bottom size of the cap 2 is larger than the top size.

[0035] Reference Figures 1 to 3 After ensuring that the pile position of the pipe pile 1 is accurate, clean the soil and debris on the top of the pipe pile 1 to ensure that the connection surface with the base 2 is clean; weld the end plate 4 on the top of the pipe pile 1 and ensure that the end plate 4 is tightly combined with the pipe pile 1; set up a base template with an expanded bottom design, and align the anchoring ribs 3 with the anchoring holes 42 to pre-embed the anchoring ribs 3 so that the anchoring ribs 3 are correctly positioned in the base template, align the anchoring ribs 3 with the anchoring holes 42 and insert them into the pipe pile 1, and use the fixing parts 5 to fix the anchoring ribs 3 on the end plate 4; pour micro-expansive cement through the through hole 41 in the middle of the end plate 4 to fill the hollow chamber of the pipe pile with micro-expansive cement; after the micro-expansive cement solidifies, pour the base concrete on the base template to ensure the quality of the concrete and avoid bubbles and voids. When the concrete reaches sufficient strength, remove the base template.

[0036] Reference Figure 1 The fixing member 5 in this embodiment is a high-strength nut 51 which is threadedly mounted on the anchor bar 3. A high-strength nut 51 is disposed at the top and bottom of the end plate 4, and a gasket 6 is disposed between each high-strength nut 51 and the end plate 4. The gasket 6 is mounted on the anchor bar 3, and the gasket 6 is abutted between the end plate 4 and the high-strength nut 51 by tightening the high-strength nut 51.

[0037] Reference Figure 2 and Figure 3A plurality of stiffening plates 43 are integrally formed at the bottom of the end plate 4 , and the stiffening plates 43 are distributed along the circumference of the inner wall of the pipe pile 1 , and the stiffening plates 43 and the anchor holes 42 are staggered, and the stiffening plates 43 and the inner wall of the pipe pile 1 are fitted together.

[0038] Reference Figure 2 and Figure 3 In order to further enhance the pull-out resistance between the pipe pile 1 and the cap 2, a plurality of connecting steel bars 44 are pre-buried at the top of the end plate 4 toward the cap 2. The plurality of connecting steel bars 44 are circumferentially distributed along the end plate 4. The top of each connecting steel bar 44 is hook-shaped and buried in the cap 2 by concrete pouring.

[0039] Reference Figure 1 In order to improve the sealing effect of the connection, a sealing cushion layer 7 is cast at the connection between the pipe pile 1 and the ground, and a waterproof membrane cloth 8 is laid on the sealing cushion layer 7.

[0040] The implementation principle of the connection structure between a pipe pile and a cap in an embodiment of the present application is as follows: after ensuring that the pile position of the pipe pile 1 is accurate, clean the soil and debris on the top of the pipe pile 1 to ensure that the connection surface with the cap 2 is clean; weld the end plate 4 to the top of the pipe pile 1, and ensure that the end plate 4 is tightly combined with the pipe pile 1; set up a cap template with an expanded bottom design, and align the anchoring ribs 3 with the anchoring holes 42 to pre-embed the anchoring ribs 3 so that the anchoring ribs 3 are correctly positioned in the cap template, align the anchoring ribs 3 with the anchoring holes 42 and insert them into the pipe pile 1, and use high-strength nuts 51 to fix the anchoring ribs 3 on the end plate 4; pour micro-expansive cement through the through hole 41 in the middle of the end plate 4 to fill the hollow chamber of the pipe pile with the micro-expansive cement; after the micro-expansive cement solidifies, pour the cap concrete on the cap template to ensure the quality of the concrete and avoid bubbles and voids. When the concrete reaches sufficient strength, remove the cap template.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A connection structure between a pipe pile and a cap, comprising a pipe pile (1), a cap (2) and anchor bars (3), characterized in that: An end plate (4) is coaxially arranged at the top end of the pipe pile (1), and a through hole (41) for concrete pouring is opened in the middle of the end plate (4). A portion of the end plate (4) located in the hollow chamber of the pipe pile (1) is provided with a plurality of anchor holes (42) distributed along its circumference. The anchor ribs (3) correspond to the anchor holes (42) one by one, and the anchor holes (42) are vertically penetrated. A fixing piece (5) for fixing the anchor ribs (3) is provided on the end plate (4).

2. The connection structure between a pipe pile and a cap according to claim 1, characterized in that: A stiffening plate (43) that fits the inner wall of the pipe pile is arranged at the bottom of the end plate (4), and a plurality of stiffening plates (43) are distributed along the circumference of the inner wall of the pipe pile, and the stiffening plates (43) and the anchor holes (42) are arranged alternately.

3. The connection structure between a pipe pile and a cap according to claim 1, characterized in that: The fixing member (5) is a high-strength nut (51) that is threadedly sleeved on the anchor bar (3). One high-strength nut (51) is disposed at the top and bottom of the end plate (4), and the high-strength nut (51) is disposed in abutment with the end plate (4).

4. The connection structure between a pipe pile and a cap according to claim 3, characterized in that: A gasket (6) is provided between the high-strength nut (51) and the end plate (4), and the gasket (6) is sleeved on the anchor bar (3).

5. The connection structure between a pipe pile and a cap according to claim 1, characterized in that: A plurality of connecting steel bars (44) are arranged along the circumferential direction on the top of the end plate (4), the top end of each connecting steel bar (44) is arranged in a hook shape, and the connecting steel bars (44) are buried in the cap (2) by pouring concrete.

6. The connection structure between a pipe pile and a cap according to claim 1, characterized in that: The bottom of the support platform (2) is designed to be expanded, and the bottom size of the support platform (2) is larger than the top size thereof.

7. The connection structure between a pipe pile and a cap according to claim 1, characterized in that: After the anchor bars (3) are fixed inside the pipe pile (1), micro-expansive cement is poured.

8. The connection structure between a pipe pile and a cap according to claim 1, characterized in that: A sealing cushion layer (7) is cast at the connection between the pipe pile (1) and the ground, and a waterproof membrane cloth (8) is laid on the sealing cushion layer (7).

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