End plate suitable for prestressed concrete precast pile

Abstract

The utility model discloses an end plate suitable for a prestressed concrete precast pile, which comprises an end plate body and a plurality of through holes vertically formed in the end plate body, the end plate body comprises a first end face and a second end face, and the first end face abuts against a pile head of the prestressed concrete precast pile; the through hole comprises a large hole and a small hole which are communicated with each other, and the small hole is formed in the first end face and used for anchoring a pier head of a prestressed main reinforcement; the large hole is formed in the second end face, and internal threads are annularly arranged on the inner wall of the large hole and used for being connected with a tensioning bolt. A common end plate is optimized, the thickness of the common end plate is increased, the circular or square annular end plate is formed, the tensioning holes and the anchoring holes share one vertical through hole, the problems of anchoring of prestressed main ribs and connection of tensioning bolts are solved, the number of the through holes is reduced, the influence of large and small gourd-shaped holes on the strength of the end plate is avoided, and the service life of the end plate is prolonged. The stability and reliability of the whole structure are improved, and the production process is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed concrete precast piles, in particular to an end plate suitable for prestressed concrete precast piles. Background Art

[0002] At present, the pile head end plates of prestressed concrete precast piles are all sheet-shaped end plates with a thickness of about 20 mm. Large and small holes are opened on the end plates corresponding to the positions of the prestressed main reinforcement of the pile body. The large holes are tensioning holes, which are used to insert the pier heads of the prestressed main reinforcement and embed the prestressed main reinforcement into the small holes and connect the tensioning anchor bolts. The small holes are swaged holes, which are used to anchor the pier heads of the prestressed main reinforcement. The large and small holes are connected in a gourd shape.

[0003] Due to the limited thickness of the end plates and their low out-of-plane stiffness, the end plates are prone to out-of-plane bending or inward deformation during production tensioning and when the pullout pile body is subjected to high tensile forces. This also requires a large amount of steel, especially for square pile end plates, resulting in high costs. Furthermore, due to the limited thickness of the end plates, excessively deep head holes can result in the base plate being too thin, potentially causing the head of the prestressed main reinforcement to pull away. Excessively shallow head holes can cause the head of the prestressed main reinforcement to protrude from the end surface. Furthermore, when welding piles together, welding at the outer edge of the thinner end plate limits the weld width, thus compromising the strength of the weld connection. Utility Model Content

[0004] The purpose of the present invention is to provide an end plate suitable for prestressed concrete precast piles, which can solve one or more of the above-mentioned problems in the prior art.

[0005] An end plate suitable for prestressed concrete precast piles, comprising: an end plate body and a plurality of through holes vertically opened in the end plate body,

[0006] The end plate body includes a first end surface and a second end surface, wherein the first end surface abuts against the pile head of the prestressed concrete precast pile;

[0007] The through hole includes a large hole and a small hole that are interconnected. The small hole is opened on the first end face and is used to anchor the pier head of the prestressed main reinforcement; the large hole is opened on the second end face, and the inner wall of the large hole is ringed with an internal thread for connecting tensioning bolts.

[0008] In some embodiments, the through hole has a ladder-like structure, with a step surface formed between the large hole and the small hole, and the step surface is used to anchor the pier head of the prestressed main reinforcement.

[0009] In some embodiments, an opening is formed between the through hole and the peripheral wall of the end plate body to facilitate the transverse insertion of the prestressed main reinforcement into the through hole.

[0010] In some embodiments, the end plate body is an annular structure.

[0011] In some embodiments, the end plate body is square.

[0012] In some embodiments, the through hole is vertically penetrated through the end plate body; the opening is formed transversely with the through hole and the outer wall of the end plate body, and the spacing between the openings is equal to the inner diameter of the small hole.

[0013] In some embodiments, the end plate body is circular.

[0014] In some embodiments, the through hole is vertically penetrated through the end plate body; the openings are radially formed between the through hole and the inner wall of the end plate body, and the spacing between the openings is equal to the inner diameter of the small hole.

[0015] In some embodiments, the thickness of the end plate body is 40-50 mm.

[0016] The beneficial effects of the present invention are as follows: the present invention optimizes the common prestressed pile end plate, increases its thickness, reduces its width, and forms a circular or square annular end plate, wherein the tensioning hole and the anchor hole share a vertical through hole, which has the following advantages:

[0017] 1. The annular end plate uses slightly less steel than the ordinary end plate, and the overall rigidity is increased, avoiding the out-of-plane bending deformation caused by the limited thickness of the ordinary end plate.

[0018] 2. The tensioning holes and anchor holes share a vertical through hole, which avoids the influence of the large and small gourd holes on the ordinary end plate on the strength of the end plate and is convenient for production.

[0019] 3. The thickness of the end plate increases, and the use of welding piles can increase the weld width and improve the welding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 、 2 This is a structural block diagram of an end plate suitable for prestressed concrete precast piles in one embodiment of the utility model;

[0021] Figure 3 yes Figure 1 a bottom view of the end plate shown;

[0022] Figure 4 yes Figure 1 a cross-sectional view of the end plate shown;

[0023] Figure 5 、 6 This is a structural schematic diagram of an end plate suitable for prestressed concrete precast piles in another embodiment of the present invention;

[0024] Figure 7 yes Figure 5a bottom view of the end plate shown;

[0025] Reference numerals in the figure: 1, end plate body; 11, first end face; 12, second end face; 2, through hole; 21, large hole; 22, small hole; 23, stepped surface; 3, opening. DETAILED DESCRIPTION

[0026] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0027] Combine Figure 1-4 As shown, this embodiment provides an end plate suitable for prestressed concrete precast piles, including an end plate body 1 and a plurality of through holes 2 vertically extending through the end plate body 1. The end plate body 1 includes a first end face 11 and a second end face 12. The first end face 11 abuts against the pile head of the prestressed concrete precast pile. The through hole 2 is a ladder-like structure, including a large hole 21 and a small hole 22 that are interconnected. The inner diameter of the large hole 21 is larger than the inner diameter of the small hole 22. Thus, a ladder surface 23 is formed at the junction of the large hole 21 and the small hole 22 for anchoring the pier head of the prestressed main reinforcement. It should be noted that the prestressed concrete precast column includes a pile body and a steel cage located within the pile body. The steel cage includes axially arranged prestressed main reinforcement and stirrups wound around the prestressed main reinforcement. Pier heads are formed at both ends of the prestressed main reinforcement. During the production and processing process, the prestressed main reinforcement is tensioned by tensioning the pier heads.

[0028] Specifically, the small hole 22 is opened at the first end face 11, and the large hole 21 is opened at the second end face 12. The large hole 21 and the small hole 22 are vertical through holes that are interconnected. The inner wall of the large hole 21 is provided with an internal thread for connecting tensioning bolts. During operation, the pier head of the prestressed main reinforcement is passed through the large hole 21 and then turned into the step surface 23 to complete the anchoring of the prestressed main reinforcement. The operation is simple and convenient. It should be noted here that the opening position and inner diameter size of the through hole 2 correspond to the prestressed main reinforcement, and are used to realize the anchoring of the prestressed main reinforcement and the connection of the tensioning bolts. Specifically, the outer diameter of the pier head of the prestressed main reinforcement should be smaller than the inner diameter of the large hole 21 and larger than the inner diameter of the small hole 22, so that the pier head of the prestressed main reinforcement can be anchored at the step surface 23 between the large hole 21 and the small hole 22. Compared to the gourd-shaped large and small holes in the prior art, the large and small holes in the present invention share a single vertical through-hole. This not only solves the problems of anchoring the prestressed main bars and connecting the tension bolts, but also reduces the number of through-holes, lowering processing difficulty and cost, and improving the space utilization of the end plate. Furthermore, the design of the present invention in which the large and small holes 21 and 22 share a single vertical through-hole also prevents the gourd-shaped holes from weakening the end plate's strength, improving the stability and reliability of the overall structure and optimizing the production process.

[0029] Furthermore, to facilitate operation by operators, an opening 3 is formed between the through hole 2 and the peripheral wall of the end plate body 1 in this embodiment. During production and processing, the operator inserts the end of the prestressed main bar horizontally into the through hole 2 through the opening 3, and then pulls the end plate body 1 outward, so that the pier head of the prestressed main bar can pass through the large hole 21 and be anchored at the stepped surface 23 between the large hole 21 and the small hole 22. The operation is simple and convenient. It should be noted here that the opening 3 is vertically penetrated between the through hole 2 and the peripheral wall of the end plate body 1, so that the prestressed main bar can be inserted horizontally into the through hole 2.

[0030] Furthermore, the end plate body 1 of this embodiment is annular, and the thickness of the end plate body 1 is 40 to 50 mm. Compared with the ordinary end plates in the prior art, the end plate of the present invention can distribute stress more evenly when subjected to force, thereby improving the overall stability and durability of the structure, ensuring sufficient strength and rigidity, and facilitating production and processing, thereby avoiding the out-of-plane bending deformation caused by the limited thickness of ordinary end plates, and using slightly less steel than ordinary end plates. It should be noted here that the shape of the end plate body 1 of the present invention matches the cross-section of the prestressed concrete precast pile. When the cross-section of the prestressed concrete precast pile is square, the end plate body 1 is a square annular structure; when the cross-section of the prestressed concrete precast pile is circular, the end plate body 1 is a circular annular structure.

[0031] Combine Figure 1 、 2As shown, in the first embodiment of the end plate of the present invention, the end plate body 1 is a square annular structure, including an inner peripheral wall and an outer peripheral wall. Through holes 2 are vertically opened at equal intervals in the end plate body 1, and openings 3 are horizontally opened between the through holes 2 and the outer peripheral wall of the end plate body 1, and the spacing of the openings 3 is equal to the inner diameter of the small hole 22. During production and processing, the end head of the prestressed main reinforcement is horizontally inserted into the through hole 2 of the end plate body through the opening 3, and then the end plate body 1 is pulled outward, and the pier head of the prestressed main reinforcement can be anchored at the small hole 22 through the large hole 21, and then the large hole 21 is connected to the tensioning bolt to realize the tensioning operation of the prestressed main reinforcement.

[0032] Combine Figure 5-7 As shown, in the second embodiment of the end plate of the present invention, the end plate body 1 is a circular ring structure, including an inner peripheral wall and an outer peripheral wall. Through holes 2 are vertically arranged in an evenly spaced ring around the end plate body 1, and openings 3 are radially formed between the through holes 2 and the inner peripheral wall of the end plate body 1.

[0033] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. An end plate suitable for prestressed concrete precast piles, characterized in that: include: An end plate body (1) and a plurality of through holes (2) vertically opened in the end plate body (1), The end plate body (1) comprises a first end surface (11) and a second end surface (12), wherein the first end surface (11) abuts against the pile head of the prestressed concrete precast pile; The through hole (2) comprises a large hole (21) and a small hole (22) that are interconnected. The small hole (22) is provided on the first end face (11) and is used for anchoring the pier head of the prestressed main reinforcement. The large hole (21) is provided on the second end face (12). The inner wall of the large hole (21) is provided with an internal thread for connecting a tensioning bolt.

2. The end plate according to claim 1, characterized in that The through hole (2) has a ladder-like structure, and a ladder surface (23) is formed between the large hole (21) and the small hole (22), and the ladder surface (23) is used for anchoring the pier head of the prestressed main reinforcement.

3. The end plate according to claim 1, wherein: An opening (3) is formed between the through hole (2) and the peripheral wall of the end plate body (1), facilitating the transverse insertion of the prestressed main reinforcement into the through hole (2).

4. The end plate according to claim 3, characterized in that The end plate body (1) is an annular structure.

5. The end plate according to claim 4, characterized in that The end plate body (1) is square.

6. The end plate according to claim 5, characterized in that The through hole (2) is vertically penetrated through the end plate body (1); the opening (3) is formed transversely on the outer wall of the through hole (2) and the end plate body (1), and the spacing between the openings (3) is equal to the inner diameter of the small hole (22).

7. The end plate according to claim 4, characterized in that The end plate body (1) is circular.

8. The end plate according to claim 7, characterized in that The through hole (2) is vertically penetrated through the end plate body (1); the opening (3) is radially formed on the inner wall of the through hole (2) and the end plate body (1), and the spacing between the openings (3) is equal to the inner diameter of the small hole (22).

9. The end plate according to claim 1, wherein: The thickness of the end plate body (1) is 40-50 mm.

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