Precast concrete pile

Abstract

The utility model discloses a precast concrete pile which comprises a precast concrete pile body and a pile tip arranged at one end of the precast concrete pile body. A reinforcement cage is arranged in the precast concrete pile body and comprises main reinforcements and stirrups; reinforcement fixing sleeves are arranged at the ends, close to the pile tips, of the main reinforcements; the edge of the end, connected with the prefabricated concrete pile body, of the pile tip is located on the inner side of an inner ring defined by the reinforcing bar fixing sleeves. The edge of the end, connected with the pile tip, of the prefabricated concrete pile body is a smooth transition curved surface. According to the precast concrete pile, due to the fact that the edge of the end, connected with the pile tip, of the precast concrete pile body is the smooth transition curved surface, in the process that the precast concrete pile is pressed into a bearing layer, stress on the end face, provided with the pile tip, of the pile body is dispersed, and then the end of the precast concrete pile is not prone to being damaged; and the service life of the prefabricated concrete pile is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated concrete piles. Background Art

[0002] In recent years, with the development of economy, the building floors in my country are getting higher and higher, which puts forward higher requirements on the vertical bearing capacity of piles and the disturbance, shear and bending moment of piles. In order to improve the deflection and shear resistance of piles, it is necessary to apply prestress to the steel bars in the pile body, and in order to facilitate the pressing of precast concrete piles into the bearing layer, it is necessary to process the pile tip at the lower end of the pile to reduce the resistance during the pressing process and guide the pile.

[0003] At the same time, in order to reduce the waste and complicated production process caused by cutting the main reinforcement at the long pile tip when the cross-sectional area of ​​the connection between the pile tip and the pile body is equal to the cross-sectional area of ​​the pile body, the cross-sectional area of ​​the connection between the pile tip and the pile body of some existing precast concrete piles is smaller than the area of ​​the inner side of the inner circle surrounded by the main reinforcement, so as to facilitate the fixing and tensioning of the main reinforcement through structures such as reinforcement sleeves. However, the precast concrete pile of this structure has a cross-sectional area of ​​approximately right angles at one end where the pile tip and the pile body are connected, and thus the edge of the end face of the pile body is a stress concentration area and thus becomes an easily damaged area during the process of pressing the precast concrete pile into the bearing layer. It is easy to cause edge damage, which may cause the main reinforcement or stirrups to leak out and be corroded by groundwater, thereby affecting the performance of the precast concrete pile. Utility Model Content

[0004] The utility model proposes a prefabricated concrete pile in view of the above problems.

[0005] The technical means adopted by the utility model are as follows:

[0006] A precast concrete pile comprises a precast concrete pile body and a pile tip arranged at one end of the precast concrete pile body;

[0007] A steel cage is provided in the precast concrete pile body, and the steel cage includes main bars and stirrups; a steel reinforcement sleeve is provided at one end of the main bars close to the pile tip;

[0008] The edge of one end of the pile tip connected to the precast concrete pile body is located inside the inner circle surrounded by the plurality of reinforcing bar sleeves;

[0009] The edge of one end of the precast concrete pile body connected to the pile tip is a smooth transition curved surface.

[0010] Furthermore, the intersection line of the smooth transition curved surface and the longitudinal section passing through the center point of the precast concrete pile body is a symmetrically arranged straight line or arc.

[0011] Furthermore, the precast concrete pile body comprises a large-section segment and a small-section segment which are arranged at intervals.

[0012] Furthermore, the cross section of the large cross section segment is square, and the cross section of the small cross section segment is circular.

[0013] Furthermore, the small cross-section segment is also provided with a reinforcing rib structure arranged along the axial direction of the pile.

[0014] Furthermore, both ends of the precast concrete pile body are large cross-section segments, and the length of the large cross-section segment at one end connected to the pile tip is greater than the lengths of the other segments.

[0015] Furthermore, the precast concrete pile body has multiple sections, both ends of the main reinforcement in the precast concrete pile body are provided with reinforcement sleeves, and two adjacent sections of the precast concrete pile body are connected by a mechanical joint.

[0016] Furthermore, the precast concrete pile body has multiple sections, and a section of the precast concrete pile body having the pile tip has a main reinforcement sleeve at one end close to the pile tip and an end plate at the other end, and the other two ends of the precast concrete pile bodies are provided with end plates, and two adjacent sections of the precast concrete pile body are connected by a mechanical joint.

[0017] Furthermore, the precast concrete pile body has multiple sections, and a section of the precast concrete pile body having the pile tip has a main reinforcement sleeve at one end close to the pile tip and an end plate at the other end, and the other two ends of the precast concrete pile bodies are provided with end plates, and two adjacent sections of the precast concrete pile body are connected by welding through the end plates.

[0018] Compared with the prior art, the precast concrete pile described in the utility model has the following beneficial effects: since the edge of one end where the precast concrete pile body is connected to the pile tip is a smooth transition curved surface, during the process of pressing the precast concrete pile into the bearing layer, the force on the end face of the pile body provided with the pile tip is dispersed, thereby making the end of the precast concrete pile less likely to be damaged, thereby increasing the service life of the precast concrete pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An axial view of the precast concrete pile disclosed in the utility model in a first direction;

[0020] Figure 2 This is a front view of the precast concrete pile disclosed in the utility model;

[0021] Figure 3 It is an axial view of the precast concrete pile disclosed in the utility model in a second direction;

[0022] Figure 4It is a schematic diagram of a first embodiment of connecting multiple sections of a precast concrete pile disclosed in the utility model, in which the precast concrete pile body has two sections, and two adjacent sections of the precast concrete pile body are connected by a mechanical joint;

[0023] Figure 5 The second embodiment of the precast concrete pile multi-section pile connection disclosed in the utility model is a schematic diagram, in which the precast concrete pile body has two sections, and the two adjacent sections of the precast concrete pile body are connected by an end plate (which can be only welded by the end plate, or can be connected by a mechanical joint on the end plate);

[0024] Figure 6 The third embodiment of the precast concrete pile multi-section pile connection disclosed in the utility model is a schematic diagram, in which the precast concrete pile body has two sections, the length of the large cross-section of one end with the pile tip is greater than the length of the other parts, and the two adjacent sections of the precast concrete pile body are connected by a mechanical joint;

[0025] Figure 7 This is a schematic diagram of a fourth embodiment of connecting multiple sections of precast concrete piles disclosed in the utility model. In the figure, the precast concrete pile body has two sections, the length of the large cross-section of one end with a pile tip is greater than the length of other parts, and the two adjacent sections of the precast concrete pile body are connected by end plates (which can be connected only by welding the end plates or by mechanical joints on the end plates).

[0026] In the figure: 1. precast concrete pile body; 10. reinforcement sleeve; 11. smooth transition surface; 12. large cross-section section; 13. small cross-section section; 14. reinforcing rib structure; 15. end plate; 2. pile tip. DETAILED DESCRIPTION

[0027] like Figure 1 , Figure 2 and Figure 3 The figure shows a precast concrete pile disclosed in the utility model, comprising a precast concrete pile body 1 and a pile tip 2 arranged at one end of the precast concrete pile body 1;

[0028] A steel cage is provided in the precast concrete pile body 1, and the steel cage includes main bars and stirrups; a steel reinforcing sleeve 10 is provided at one end of the main bars close to the pile tip;

[0029] The edge of one end of the pile tip 2 connected to the precast concrete pile body 1 is located inside the inner circle surrounded by the plurality of reinforcing bar sleeves 10;

[0030] The edge of one end of the precast concrete pile body 1 connected to the pile tip 2 is a smooth transition curved surface 11 .

[0031] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the precast concrete pile disclosed in the utility model comprises a precast concrete pile body 1, in which a steel cage is arranged, the steel cage comprises a plurality of main bars arranged circumferentially and an outer wall spirally wrapped around an outer ring formed by the plurality of main bars, the precast concrete body and the steel cage are cast into an integral structure, a steel bar sleeve is provided at one end of the main bar close to the pile tip, so that prestress is applied to the main bar through the steel bar sleeve, thereby ensuring the deflection and shear resistance of the precast concrete pile, and at the same time, in order to facilitate the use of the steel bar sleeve to apply prestress to the main bar, the edge of the end of the pile tip connected to the precast concrete pile body 1 is located in the inner ring formed by the plurality of steel bar sleeves 10. The inner side of the pile tip and the reinforcement sleeve avoid each other, thereby facilitating connection with the reinforcement sleeve through structures such as tension bolts; the precast concrete pile disclosed in the utility model has a smooth transition curved surface 11 at the edge of one end where the precast concrete pile body 1 is connected to the pile tip 2, that is, the end portion of the end connected to the pile tip gradually increases in cross-sectional area from one side close to the pile tip to the other side, so that the cross-sectional area of ​​the end portion changes gradually, thereby avoiding the problem that in the process of pressing the precast concrete pile into the bearing layer, stress concentration at the edge is caused by a sudden change in the end area, making the end edge easy to be damaged, the main reinforcement or stirrups leaking out are easy to be corroded, and the service life of the precast concrete pile is affected.

[0032] Furthermore, the intersection line of the smooth transition curved surface 11 and the longitudinal section passing through the center point of the precast concrete pile body 1 is a symmetrically arranged straight line or arc line, that is, when the concrete pile body is a columnar pile, the smooth transition curved surface part forms a truncated cone structure (the generatrix of the truncated cone is a straight line) or a similar truncated cone structure (the generatrix of the truncated cone is an arc line), the small head section of the truncated cone is connected to the pile tip, and the large head end of the truncated cone is connected to the pile body. This structure is not only convenient for processing, but also can reduce the end face force in the process of pressing into the bearing layer. In this embodiment, the part where the precast concrete pile body is connected to the pile tip is a square pile. Therefore, the smooth transition curved surface is the intersection surface of the truncated cone surface and the similar truncated cone surface and the square pile.

[0033] Furthermore, if Figure 1 , Figure 2 and Figure 3 As shown, the precast concrete pile body 1 includes a large cross-section segment 12 and a small cross-section segment 13 that are arranged at intervals, which increases the friction resistance between the precast concrete pile and the bearing layer, thereby improving the vertical bearing capacity and the pull-out resistance of the pile body.

[0034] Furthermore, the cross-section of the large cross-section segment 12 is square, and the cross-section of the small cross-section segment 13 is circular. Since the cross-section of the large cross-section segment of the precast concrete pile disclosed in the utility model is square, and the small cross-section segment is circular, and since the second-order moment of inertia of a circular column is larger than that of a square column, its anti-bending and torsional performance when subjected to distributed loads is more superior. The precast concrete pile disclosed in the present application has a small circular cross-section, thereby improving the anti-bending and torsional performance of the pile when it is subjected to distributed loads.

[0035] Furthermore, if Figure 1 As shown, the small cross-section segment 13 is also provided with a reinforcing rib structure 14 arranged along the axial direction of the pile, so as to further improve the bending and torsion resistance of the small cross-section segment.

[0036] Furthermore, both ends of the precast concrete pile body 1 are large cross-section segments 12, and the length of the large cross-section segment 12 at one end connected to the pile tip 2 is greater than the length of other segments. When the cross-sectional area is the same, the circumference of a square is longer than that of a circle. In the utility model, the cross-section of the part of the precast concrete pile provided with the pile tip is square, so that it has a longer circumference, and therefore, has a larger effective area with the bearing layer, and the force acting on the precast concrete pile with the bearing layer is greater the deeper it enters the bearing layer. In the utility model, the length of the large cross-section segment 12 at one end connected to the pile tip 2 is greater than the length of other segments, so that it can have a larger effective force with the bearing layer, thereby improving the pull-out resistance.

[0037] Furthermore, if Figure 4 and Figure 6 As shown, the precast concrete pile body 1 has multiple sections, two of which are shown in the figure. Both ends of the main reinforcement in the precast concrete pile body 1 are provided with a reinforcement sleeve 10. The two adjacent sections of the precast concrete pile body 1 are connected by a mechanical joint. The reinforcement sleeves of the two adjacent precast concrete piles are respectively connected with a plug rod and a clamping assembly of a mechanical structure. The mechanical joint is used to achieve a quick connection between the two adjacent sections of the precast concrete piles. The mechanical joint can adopt CN2122946388U / CN211286298U /

[0038] The conventional mechanical joints disclosed in CN210562156U / CN209854927U / etc. are used for connection. Preferably, the mechanical joints disclosed in CN117385867A / CN117344720A / CN117107750A / CN117026953A / CN117005400A / CN116815750A / CN116815751A etc. are used for connection, so as to ensure that the gap between the mechanical joints can be eliminated after the piles are connected, thereby improving the performance of the piles after connection. Figure 4 The lengths of the large and small sections are the same. Figure 6The length of the large cross-section section at one end connected to the pile tip is greater than the lengths of the other sections. At the same time, the structure of each section of the precast concrete pile body can be the same, that is, each section of the precast concrete pile body has a large cross-section section with a larger length at one end. The structure of the precast concrete pile body of the first section can also be different from that of the precast concrete pile bodies of other sections, that is, the end of the precast concrete pile body of the first section is a large cross-section section with a longer length and is connected to the pile tip, and the lengths of the large cross-section sections and the small cross-section sections of the precast concrete pile bodies of other sections are consistent.

[0039] Furthermore, if Figure 5 and Figure 7 As shown, the precast concrete pile body 1 has multiple sections. One end of the main reinforcement of the precast concrete pile body 1 provided with the pile tip 2 is provided with a reinforcement sleeve 10 near the pile tip, and the other end is provided with an end plate 15. Both ends of the other precast concrete pile bodies 1 are provided with end plates 15, and two adjacent precast concrete pile bodies 1 are connected by a mechanical joint.

[0040] Specifically, one end of the main reinforcement of a section of the precast concrete pile body with a pile tip is connected to the reinforcement sleeve, and the other end is connected to the end plate, and both ends of the main reinforcement of the precast concrete pile body of the other sections are connected to the end plate, and the end plates of the two connected sections of the precast concrete pile body are respectively installed with a plug rod and a clamping assembly of a mechanical joint, and the precast concrete pile can be quickly connected through the mechanical joint; the mechanical joint can adopt CN2122946388U / CN211286298U / CN210562156U / CN20985 4927U / etc., preferably, mechanical joints such as CN117385867A / CN117344720A / CN117107750A / CN117026953A / CN117005400A / CN116815750A / CN116815751A etc., which can be adjusted to eliminate the gap between the pile ends after the piles are connected, are used for connection, so as to ensure that the gap between the mechanical joints can be eliminated after the piles are connected, thereby improving the performance of the piles after connection.

[0041] Furthermore, the precast concrete pile body has multiple sections, and a section of the precast concrete pile body provided with the pile tip has a main reinforcement sleeve at one end close to the pile tip and an end plate at the other end, and the other precast concrete pile bodies have end plates at both ends, and two adjacent sections of the precast concrete pile body are connected by welding through the end plates, that is, the two adjacent sections of the precast concrete pile can be quickly connected by a mechanical joint, and the connection between the piles can also be achieved by welding the end plates.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precast concrete pile, characterized in that: It comprises a precast concrete pile body and a pile tip arranged at one end of the precast concrete pile body; A steel cage is provided in the precast concrete pile body, and the steel cage includes main bars and stirrups; a steel reinforcement sleeve is provided at one end of the main bars close to the pile tip; The edge of one end of the pile tip connected to the precast concrete pile body is located inside the inner circle surrounded by the plurality of reinforcing bar sleeves; The edge of one end of the precast concrete pile body connected to the pile tip is a smooth transition curved surface.

2. The precast concrete pile according to claim 1, characterized in that: The intersection line between the smooth transition curved surface and the longitudinal section passing through the center point of the precast concrete pile body is a symmetrically arranged straight line or arc.

3. The precast concrete pile according to claim 1 or 2, characterized in that: The precast concrete pile body comprises a large cross-section segment and a small cross-section segment which are arranged at intervals.

4. The precast concrete pile according to claim 3, characterized in that: The cross section of the large cross section segment is square, and the cross section of the small cross section segment is circular.

5. The precast concrete pile according to claim 4, characterized in that: The small cross-section segment is also provided with a reinforcing rib structure arranged along the axial direction of the pile.

6. The precast concrete pile according to claim 5, characterized in that: Both ends of the precast concrete pile body are large-section segments, and the length of the large-section segment at one end connected to the pile tip is greater than the lengths of the other segments.

7. The precast concrete pile according to claim 6, characterized in that: The precast concrete pile body has multiple sections. Both ends of the main reinforcement in the precast concrete pile body are provided with reinforcement sleeves, and two adjacent sections of the precast concrete pile body are connected by a mechanical joint.

8. The precast concrete pile according to claim 6, characterized in that: The precast concrete pile body has multiple sections. One end of the main reinforcement of the precast concrete pile body provided with the pile tip is provided with a reinforcement sleeve near the pile tip, and the other end is provided with an end plate. Both ends of the other precast concrete pile bodies are provided with end plates. Two adjacent sections of the precast concrete pile body are connected by a mechanical joint.

9. The precast concrete pile according to claim 6, characterized in that: The precast concrete pile body has multiple sections. One end of the main reinforcement of the precast concrete pile body provided with the pile tip is provided with a reinforcement sleeve near the pile tip, and the other end is provided with an end plate. Both ends of the other precast concrete pile bodies are provided with end plates, and two adjacent sections of the precast concrete pile body are connected by welding through the end plates.

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