High-strength prefabricated concrete pipe pile
By combining the design of supporting concentric tubes and constraining concentric tubes, along with stress filling layers and connecting structures, the problem of unstable reinforcement position in precast concrete pipe piles under grout impact was solved, achieving a high-strength and stable stress support effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HUAWEI CONCRETE PROD CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional precast concrete pipe piles suffer from unstable internal steel reinforcement under grout impact, resulting in uneven distribution, which affects the strength of the pile and makes the structure unstable. They also lack an effective double support mechanism to improve stress support capacity.
It adopts a combination design of supporting concentric tubes and constraining concentric tubes, with first and second stress filling layers inside. It uses steel strand mesh, shape memory nickel-titanium alloy wire and fiber-reinforced composite carbon fiber material. The stability is enhanced by the double stress support structure, and a stable connection is achieved through connecting flanges and threaded holes.
This method achieves dual stress support for precast concrete pipe piles under pressure, improving structural stability and connection reliability, and avoiding problems such as rebar misalignment and structural instability.
Smart Images
Figure CN224243834U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of concrete pipe pile technology, specifically a high-strength precast concrete pipe pile. Background Technology
[0002] With the development needs of coastal cities, large-scale land reclamation projects are being carried out, and a large number of super high-rise and super deep buildings will rise in the reclaimed areas. In these reclaimed areas, the use of large-diameter ultra-deep prestressed concrete pipe piles is becoming increasingly widespread. Prestressed concrete pipe piles have advantages such as good pile quality, high single pile bearing capacity, fast construction speed, short construction period, and low cost. Moreover, they do not require mud slurry wall protection during the drilling process, avoiding the generation of a large amount of mud waste and achieving green construction.
[0003] Chinese invention patent application CN112376551B discloses a high-strength precast concrete pipe pile, comprising a skeleton, a concrete outer layer, a first end, a second end, an insertion head, and supporting positioning units. The skeleton is encased in a cylindrical concrete outer layer. The first end is installed at the upper end of the concrete outer layer, the second end at the lower end, and the insertion head at the lower end of the second end. Supporting positioning units are evenly distributed on the skeleton from top to bottom. This invention solves the problem of traditional methods where internal reinforcing bars are randomly inserted into the pile. However, this method lacks a supporting mechanism to support the surrounding area of the internal reinforcing bars, leading to instability in their position. Under the enormous impact force of the grout, the internal reinforcing bars are prone to displacement, disrupting their distribution and causing uneven strength within the pile. Furthermore, the cylindrical pipe pile structure is unstable, and its walls are easily subjected to internal pressure from the external soil. However, this device does not address the issue of improving the stress support capacity of the precast concrete pipe pile through two auxiliary supports. Therefore, we propose a high-strength precast concrete pipe pile. Utility Model Content
[0004] The purpose of this utility model is to provide a high-strength precast concrete pipe pile to solve the problem mentioned in the background art that it is not possible to improve the stress support capacity of the precast concrete pipe pile by means of two auxiliary supports.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A high-strength precast concrete pipe pile includes an installation ground, a support mechanism fixedly installed on the top of the installation ground, a main body mechanism fixedly installed in the middle of the support mechanism, the main body mechanism including a support concentric tube, a constraint concentric tube fixedly installed on one side of the support concentric tube, and a first stress filling layer fixedly installed inside the support concentric tube.
[0007] Preferably, both the supporting concentric tube and the constraining concentric tube are made of high-strength alloy steel. A second stress filling layer is fixedly provided in the middle of both the supporting concentric tube and the constraining concentric tube. Arranged holes are opened on the surface of both the supporting concentric tube and the constraining concentric tube. Two sets of supporting steel bars pass through the middle of both the supporting concentric tube and the constraining concentric tube. The two sets of supporting steel bars intersect each other, which is beneficial to better fix the structure between the supporting concentric tube and the constraining concentric tube through the supporting steel bars.
[0008] Preferably, a first support wire layer is fixedly disposed inside the first stress filling layer, and a first auxiliary support wire is fixedly disposed in the middle of the first support wire layer. The first support wire layer and the first auxiliary support wire layer are fixedly disposed inside the support concentric tube through the first concrete filling layer. The design of the wire layer, the first auxiliary support wire and the first concrete filling layer being mutually cast by the first support and other connecting structures is used to assist in improving the support concentric tube and the support concentric tube to perform the first stress support.
[0009] Preferably, a second support wire layer is fixedly disposed inside the second stress filling layer, and a plurality of support rings are fixedly disposed at the bottom of the second support wire layer. The support rings are fixedly disposed on the surface of the support concentric tube by an adhesive layer. A second auxiliary support wire layer is fixedly disposed on the top of the support steel bar on one side of the support ring. The second support wire layer and the second auxiliary support wire layer are fixedly disposed in the middle of the support concentric tube and the constraint concentric tube by a second concrete filling layer. When the pressure on the top of the support concentric tube is continuously dispersed over time, causing the support concentric tube to shift, the design of the support concentric tube and the constraint concentric tube penetrating each other and the design of the second support wire layer, the support rings, the second auxiliary support wire layer and the second concrete filling layer being cast together are used to help improve the support concentric tube and provide a second stress support for the support concentric tube.
[0010] Preferably, the first and second support wire layers are made of steel strand mesh material, the first and second auxiliary support wire layers are made of shape memory nickel-titanium alloy wire, the support ring is made of fiber-reinforced composite carbon fiber material, and the adhesive layer is made of polyurethane adhesive. The design of steel strand mesh material, shape memory nickel-titanium alloy wire, fiber-reinforced composite carbon fiber and concrete filling layer greatly improves the support capacity of the precast concrete pipe pile.
[0011] Preferably, the support mechanism includes two connecting flanges and threaded holes. The two connecting flanges are fixed to the top and bottom of the supporting concentric tube by welding. The top and bottom of the two connecting flanges are provided with two sets of threaded holes. The combination design of fixing two connecting flanges at both ends of the concentric tube and providing threaded holes at the top and bottom of the two connecting flanges achieves the purpose of connecting the precast concrete pipe pile in a stable connection structure.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. This high-strength precast concrete pipe pile, when encountering pressure from the top of the supporting concentric tube, directly bears the pressure from the top of the supporting concentric tube. Simultaneously, a design involving the interweaving of a first support with other connecting structures—a wire layer, a first auxiliary support wire, and a first concrete filling layer—assists in providing initial stress support to the supporting concentric tube. Subsequently, as the pressure at the top of the supporting concentric tube gradually disperses over time, causing it to shift, a design involving the interpenetration of the supporting concentric tube and the constrained concentric tube, along with the interweaving of a second support wire layer, a support ring, a second auxiliary support wire layer, and a second concrete filling layer, further assists in providing a second stress support. This combined design allows the precast concrete pipe pile to easily improve its stress support capacity through two auxiliary supports.
[0014] 2. This high-strength precast concrete pipe pile achieves the purpose of facilitating stable connection of the precast concrete pipe pile by fixing two connecting flanges at both ends of the concentric pipe and opening threaded holes at the top and bottom of the two connecting flanges. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the high-strength precast concrete pipe pile of this utility model;
[0016] Figure 2 This is a three-dimensional structural diagram of the supporting concentric tube, the constraining concentric tube, the first stress filling layer, and the second stress filling layer of this utility model.
[0017] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the concentric tube of this utility model;
[0018] Figure 4 This is a schematic diagram of the surface and internal three-dimensional structure of the supporting concentric tube of this utility model.
[0019] In the diagram: 1. Installation ground; 2. Supporting concentric tube; 3. Constraining concentric tube; 4. First stress filling layer; 5. Second stress filling layer; 6. Arranged holes; 7. Supporting reinforcing bars; 8. First supporting wire layer; 9. First auxiliary supporting wire; 10. First concrete filling layer; 11. Second supporting wire layer; 12. Supporting ring; 13. Adhesive layer; 14. Second auxiliary supporting wire layer; 15. Second concrete filling layer; 16. Connecting flange; 17. Threaded hole. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figures 1-4 As shown, this utility model provides a high-strength precast concrete pipe pile technical solution:
[0022] A high-strength precast concrete pipe pile includes an installation ground 1, a support mechanism fixedly installed on the top of the installation ground 1, a main body mechanism fixedly installed in the middle of the support mechanism, the main body mechanism including a support concentric tube 2, a constraint concentric tube 3 fixedly installed on one side of the support concentric tube 2, and a first stress filling layer 4 fixedly installed inside the support concentric tube 2.
[0023] In this embodiment, preferably, both the supporting concentric tube 2 and the constraining concentric tube 3 are made of high-strength alloy steel. A second stress filling layer 5 is fixedly provided in the middle of the supporting concentric tube 2 and the constraining concentric tube 3. Arranged holes 6 are opened on the surface of both the supporting concentric tube 2 and the constraining concentric tube 3. Two sets of supporting steel bars 7 pass through the middle of both the supporting concentric tube 2 and the constraining concentric tube 3. The two sets of supporting steel bars 7 intersect each other, which is beneficial to better fix the structure between the supporting concentric tube 2 and the constraining concentric tube 3 through the supporting steel bars 7.
[0024] In this embodiment, preferably, a first support wire layer 8 is fixedly disposed inside the first stress filling layer 4, and a first auxiliary support wire 9 is fixedly disposed in the middle of the first support wire layer 8. The first support wire layer 8 and the first auxiliary support wire 9 are fixedly disposed inside the support concentric tube 2 through the first concrete filling layer 10. The design of the wire layer, the first auxiliary support wire 9 and the first concrete filling layer 10 being mutually cast by the first support and other connecting structures is used to help improve the support concentric tube 2 and to provide the first stress support for the support concentric tube 2.
[0025] In this embodiment, preferably, a second support wire layer 11 is fixedly disposed inside the second stress filling layer 5, and a plurality of support rings 12 are fixedly disposed at the bottom of the second support wire layer 11. The support rings 12 are fixedly disposed on the surface of the support concentric tube 2 through an adhesive layer 13. A second auxiliary support wire layer 14 is fixedly disposed at the top of the support steel bar 7 on one side of the support ring 12. The second support wire layer 11 and the second auxiliary support wire layer 14 are fixedly disposed in the middle of the support concentric tube 2 and the constraint concentric tube 3 through a second concrete filling layer 15. When the pressure at the top of the support concentric tube 2 is continuously dispersed over time, causing the support concentric tube 2 to shift, the design of the support concentric tube 2 and the constraint concentric tube 3 penetrating each other, as well as the design of the second support wire layer 11, the support rings 12, the second auxiliary support wire layer 14, and the second concrete filling layer 15 being cast together, are used to help improve the support concentric tube 2 and provide a second stress support for the support concentric tube 2.
[0026] In this embodiment, preferably, the first support wire layer 8 and the second support wire layer 11 are steel strand mesh materials, the first auxiliary support wire layer 9 and the second auxiliary support wire layer 14 are shape memory nickel-titanium alloy wires, the support ring 12 is fiber-reinforced composite carbon fiber material, and the adhesive layer 13 is polyurethane adhesive. The design of steel strand mesh material, shape memory nickel-titanium alloy wire, fiber-reinforced composite carbon fiber and concrete filling layer greatly improves the support capacity of the precast concrete pipe pile.
[0027] In this embodiment, preferably, the support mechanism includes two connecting flanges 16 and threaded holes 17. The two connecting flanges 16 are fixed to the top and bottom of the supporting concentric tube 2 by welding. The top and bottom of the two connecting flanges 16 are provided with two sets of threaded holes 17. The combination design of fixing two connecting flanges 16 at both ends of the concentric tube 3 and providing threaded holes 17 at the top and bottom of the two connecting flanges 16 achieves the purpose of connecting the precast concrete pipe pile in a stable connection structure.
[0028] In this embodiment, a high-strength precast concrete pipe pile is used. First, the precast concrete pipe pile is stably fixed to the top of the installation ground 1 through two sets of threaded holes 17 at the top and bottom of two connecting flanges 16 and external connecting bolts. When the precast concrete pipe pile encounters pressure from the top of the supporting concentric tube 2, the supporting concentric tube 2 directly bears the pressure from the top of the supporting concentric tube 2. At the same time, the design of the first support and other connecting structures, the first auxiliary support wire 9 and the first concrete filling layer 10 are mutually cast to help improve the supporting concentric tube 2 and provide the first stress support. Subsequently, as the pressure on the top of the supporting concentric tube 2 changes over time and causes the supporting concentric tube 2 to shift, the design of the supporting concentric tube 2 and the constraining concentric tube 3 penetrating each other, and the design of the second support wire layer 11, the support ring 12, the second auxiliary support wire layer 14 and the second concrete filling layer 15 being mutually cast are used to help improve the supporting concentric tube 2 and provide the second stress support, thereby ensuring the stability of the precast concrete pipe pile.
[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various variations and improvements to high-strength precast concrete pipe piles may be made without departing from the spirit and scope of this utility model, and all such variations and improvements fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A high-strength precast concrete pipe pile, comprising an installation ground (1), characterized in that; A support mechanism is fixedly installed on the top of the installation ground (1), and a main body mechanism is fixedly installed in the middle of the support mechanism. The main body mechanism includes a support concentric tube (2), a constraint concentric tube (3) is fixedly installed on one side of the support concentric tube (2), and a first stress filling layer (4) is fixedly installed inside the support concentric tube (2).
2. The high-strength precast concrete pipe pile according to claim 1, characterized in that: Both the supporting concentric tube (2) and the constraining concentric tube (3) are made of high-strength alloy steel. A second stress filling layer (5) is fixedly provided in the middle of the supporting concentric tube (2) and the constraining concentric tube (3). Both the supporting concentric tube (2) and the constraining concentric tube (3) have arranged holes (6) on their surfaces. Both the supporting concentric tube (2) and the constraining concentric tube (3) have two sets of supporting steel bars (7) passing through their middle sections. The two sets of supporting steel bars (7) intersect each other.
3. A high-strength precast concrete pipe pile according to claim 2, characterized in that: The first stress filling layer (4) is fixedly provided with a first support wire layer (8), and a first auxiliary support wire (9) is fixedly provided in the middle of the first support wire layer (8). The first support wire layer (8) and the first auxiliary support wire (9) are fixedly provided inside the support concentric tube (2) through the first concrete filling layer (10).
4. A high-strength precast concrete pipe pile according to claim 3, characterized in that: A second support wire layer (11) is fixedly disposed inside the second stress filling layer (5). A plurality of support rings (12) are fixedly disposed at the bottom of the second support wire layer (11). The support rings (12) are fixedly disposed on the surface of the support concentric tube (2) through an adhesive layer (13). A second auxiliary support wire layer (14) is fixedly disposed on the top of the support steel bar (7) on one side of the support ring (12). The second support wire layer (11) and the second auxiliary support wire layer (14) are fixedly disposed in the middle of the support concentric tube (2) and the constraint concentric tube (3) through a second concrete filling layer (15).
5. A high-strength precast concrete pipe pile according to claim 4, characterized in that: The first support wire layer (8) and the second support wire layer (11) are steel strand mesh materials, the first auxiliary support wire layer (9) and the second auxiliary support wire layer (14) are shape memory nickel-titanium alloy wires, the support ring (12) is fiber-reinforced composite carbon fiber material, and the adhesive layer (13) is polyurethane adhesive.
6. A high-strength precast concrete pipe pile according to claim 1, characterized in that: The support mechanism includes two connecting flanges (16) and threaded holes (17). The two connecting flanges (16) are fixed to the top and bottom of the supporting concentric tube (2) by welding. The top and bottom of the two connecting flanges (16) are provided with two sets of threaded holes (17).