Prestressed concrete pile head structure

Abstract

The utility model discloses a prestressed concrete pile head structure which comprises a pile head structure body, the pile head structure body comprises a prefabricated supporting body, a prestressed secondary pouring body arranged inside the prefabricated supporting body and a supporting secondary pouring body arranged outside the prefabricated supporting body, and a supporting top is arranged at the top of the prefabricated supporting body. A metal tensioning plate is arranged at the top of the supporting top in a supporting mode, a plurality of steel bar fixing pieces are fixedly arranged at the bottom in the prefabricated supporting body in an integrated pouring mode, fastening screws penetrating through the metal tensioning plate are welded to the tops of the steel bar screw fixing pieces, and the fastening screws extend to the position above the metal tensioning plate and are connected with tensioning nuts in a threaded mode. Compared with the prior art, the prestressed pile head has the advantages that the prefabricated supporting body is matched with the prestressed secondary pouring body and the supporting secondary pouring body, the pile head can be designed according to requirements, prestress can be provided for the whole pile head through the design of the internal prestressed secondary pouring body, and therefore the overall strength of the pile head is improved.

Description

Technical Field

[0001] This utility model relates to the field of concrete pile head technology, specifically to a prestressed concrete pile head structure. Background Technology

[0002] A concrete pile head is the part of a concrete pile that comes into contact with the superstructure. It usually needs to be treated during construction. Concrete pile heads include two types: precast piles and cast-in-place piles.

[0003] For general concrete pile heads, if precast piles are used entirely, the transportation cost is relatively high, and it is impossible to adjust according to the site requirements. While cast-in-place piles can meet the site requirements, the prestressing design of the pile body cannot be guaranteed due to site conditions. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a prestressed concrete pile head structure, addressing the shortcomings mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a prestressed concrete pile head structure, including a pile head structure body, wherein the pile head structure body includes a precast support body, a prestressed secondary casting body disposed inside the precast support body, and a support secondary casting body disposed outside the precast support body;

[0006] The prefabricated support body is provided with a support top, and a metal tension plate is supported on the top of the support top. The metal tension plate has a casting through hole in the middle. Multiple steel bar screw fasteners are integrally cast and fixed at the bottom of the prefabricated support body. A fastening screw that penetrates the metal tension plate is welded to the top of the steel bar screw fastener. The fastening screw extends to the top of the metal tension plate and is threadedly connected to a tension nut.

[0007] Furthermore, the precast support body has multiple support columns integrally cast at the bottom, which facilitates the support of the secondary casting body to completely enclose the precast support body.

[0008] Furthermore, the metal tensioning plate is provided with a through hole for the fastening screw to pass through, facilitating the through-hole operation of the fastening screw.

[0009] Furthermore, the diameter of the tightening nut is larger than that of the through hole, which facilitates the tightening operation of the tightening nut on the fastening screw.

[0010] The advantages of this utility model compared with the prior art are as follows: This utility model, through the combination of prefabricated support body and prestressed secondary casting body and support secondary casting body, can design the pile head according to the requirements and provide prestress to the pile head as a whole through the design of internal prestressed secondary casting body, thereby increasing the overall strength of the pile head. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of a prestressed concrete pile head structure.

[0012] Figure 2 This is a cross-sectional structural diagram of a prestressed concrete pile head structure.

[0013] As shown in the figure: 1. Main structure of pile head; 2. Precast support body; 3. Support top; 4. Metal tension plate; 5. Reinforcing bar fastener; 6. Fastening screw; 7. Through hole; 8. Tensioning nut; 9. Prestressed secondary cast-in-place body; 10. Support secondary cast-in-place body; 11. Support column; 12. Casting through hole. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Combined with appendix Figure 1-2 A prestressed concrete pile head structure includes a pile head structure body 1. The pile head structure body 1 includes a precast support body 2, a prestressed secondary cast-in-place body 9 disposed inside the precast support body 2, and a supporting secondary cast-in-place body 10 disposed outside the precast support body 2. Multiple supporting columns 11 are integrally cast at the bottom of the precast support body 2. In actual use, the precast requirements for the precast support body 2 are high. After precast casting, the surface of the precast support body 2 needs to be ground smooth. The prestressed secondary cast-in-place body 9 and the supporting secondary cast-in-place body 10 are then cast on-site. Before pouring, the inside and outside of the precast support 2 need to be cleaned a second time and a layer of concrete mortar needs to be applied to the joint to enhance the adhesion. At the same time, the curing time for the joint of the concrete poured twice needs to be longer. It is generally recommended that the curing time of the concrete poured at the joint be no less than 7 days to ensure that the concrete fully solidifies and obtains sufficient strength. During the curing period, it is necessary to regularly moisturize the concrete and spray water to cool it down to ensure that the concrete is under suitable temperature and humidity conditions. Otherwise, the concrete may crack, seep water and other problems, affecting its strength and durability.

[0016] The prefabricated support body 2 has a support top 3, and a metal tension plate 4 is supported on the top of the support top 3. The metal tension plate 4 has a pouring through hole 12 in the middle. Multiple steel rebar bolt fasteners 5 are integrally cast and fixed at the bottom of the prefabricated support body 2. That is, the support top 3 and the multiple steel rebar bolt fasteners 5 are integrally cast. The metal tension plate 4 is externally placed on the support top 3. In practice, after the overall structure is poured, the support top 3 can be poured and buried again, or it can be cut off and ground away. The top of the steel rebar bolt fasteners 5 is welded with a fastening bolt 6 that penetrates the metal tension plate 4. The fastening bolt 6 extends to the top of the metal tension plate 4 and is threadedly connected to a tension nut 8. The metal tension plate 4 has a through hole 7 for the fastening bolt 6 to pass through. The diameter of the tension nut 8 is larger than that of the through hole 7. In actual operation... After placing the metal tension plate 4, and passing through the through hole 7 with multiple fastening screws 6, the concrete is poured through the pouring through hole 12. After pouring, the fastening screws 6 are tightened with tension nuts 8, and then the concrete is allowed to solidify. During the solidification process, routine operations such as concrete mixing and degassing are required. At the same time, the secondary supporting pouring body 10 can also be poured simultaneously while the prestressed secondary pouring body 9 is being poured. Before pouring the secondary supporting pouring body 10, the overall diameter of the pile head structure 1 needs to be excavated according to the site requirements. The precast support body 2 needs to be placed in the center so as not to affect the secondary pouring of the secondary supporting pouring body 10. If the actual design is accurate, the secondary supporting pouring body 10 can be omitted. After the prestressed secondary pouring body 9 has solidified, the metal tension plate 4 can be removed and the tension nuts 8 can be removed. Then, the top can be ground to facilitate the subsequent pouring of the pile head.

[0017] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A prestressed concrete pile head structure, comprising a pile head structure body (1), characterized in that: The main body (1) of the pile head structure includes a precast support body (2), a prestressed secondary cast-in-place body (9) set inside the precast support body (2), and a support secondary cast-in-place body (10) set outside the precast support body (2); The prefabricated support body (2) is provided with a support top (3), and a metal tension plate (4) is provided on the top of the support top (3). A casting through hole (12) is provided in the middle of the metal tension plate (4). Multiple steel bar screw fasteners (5) are integrally cast and fixed at the bottom of the prefabricated support body (2). A fastening screw (6) that penetrates the metal tension plate (4) is welded to the top of the steel bar screw fastener (5). The fastening screw (6) extends to the top of the metal tension plate (4) and is threadedly connected to a tension nut (8).

2. The prestressed concrete pile head structure according to claim 1, characterized in that: The prefabricated support body (2) has multiple support columns (11) integrally cast at the bottom.

3. A prestressed concrete pile head structure according to claim 1, characterized in that: The metal tensioning plate (4) is provided with a through hole (7) through which the fastening screw (6) passes.

4. A prestressed concrete pile head structure according to claim 3, characterized in that: The diameter of the tension nut (8) is larger than that of the through hole (7).

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