Variable cross-section reinforced concrete precast pile
By installing stainless steel reinforcement frames and multi-layer anti-corrosion reinforcement components on precast reinforced concrete piles with variable cross-sections, the problem of poor anti-corrosion effect is solved, achieving effective protection and self-repair in saline-alkali areas, and improving the mechanical properties and reliability of the pile body.
Patent Information
- Application Number
- CN202520138995.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing variable cross-section precast reinforced concrete piles have poor corrosion resistance when used in saline-alkali areas, making them susceptible to corrosion, which leads to changes in strength and structure and reduces their effectiveness.
The steel frame and external anti-corrosion reinforcement components, including spring-shaped support bars and anti-corrosion coating, are made of stainless steel, combined with glass fiber reinforced plastic cloth and stainless steel wire mesh, to form a multi-layer protection that prevents corrosive media from penetrating and allows for self-repair through liquid guide tanks and liquid injection tanks.
It effectively prevents the penetration of corrosive media, enhances the protective effect of the pile body, improves the comprehensive mechanical properties and deformation resistance, reduces maintenance costs, and ensures the reliability and safety of use in complex environments.
Smart Images
Figure CN223497153U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of precast concrete pile technology, specifically a variable cross-section reinforced concrete precast pile. Background Technology
[0002] Variable cross-section precast reinforced concrete piles are precast reinforced concrete piles with different cross-sectional dimensions in different parts of the pile body. They are usually designed with different cross-sectional shapes and sizes during the manufacturing process, based on the stress conditions and bearing requirements of the pile in the foundation, in order to achieve better bearing performance and economic benefits.
[0003] Existing variable cross-section reinforced concrete precast piles have poor corrosion resistance during use and are prone to corrosion in saline-alkali areas. Once corrosion occurs, it will cause changes in the strength structure of the variable cross-section reinforced concrete precast piles, reducing their performance. Utility Model Content
[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a variable cross-section reinforced concrete precast pile with the advantages of corrosion protection and isolation. This solves the problem that existing variable cross-section reinforced concrete precast piles have poor corrosion resistance during use and are easily corroded in saline-alkali areas. Once corrosion occurs, it will cause changes in the strength structure of the variable cross-section reinforced concrete precast pile, reducing its performance.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a variable cross-section reinforced concrete precast pile, comprising a precast concrete pile body and a steel reinforcement frame, wherein the precast concrete pile body is cast on the steel reinforcement frame, the steel reinforcement frame is made of stainless steel, an anti-corrosion reinforcement component is provided on the outside of the precast concrete pile body, and an anti-corrosion isolation component is provided on the outside of the precast concrete pile body.
[0006] As a preferred embodiment of this invention, the anti-corrosion reinforcement component includes supporting steel bars, which are spring-shaped, and a polymer concrete layer is poured on the outer side of the supporting steel bars.
[0007] As a preferred embodiment of the present invention, the anti-corrosion isolation component includes an anti-corrosion coating, which is sprayed onto the surface of the polymer concrete layer, and a glass fiber reinforced plastic cloth is wrapped around the outside of the anti-corrosion coating.
[0008] As a preferred embodiment of this utility model, a hollow liquid guiding groove is provided inside the supporting steel bar along the axial direction, and a liquid injection groove is provided at the top of the liquid guiding groove.
[0009] As a preferred embodiment of this invention, the outer layer of the glass fiber reinforced plastic cloth is wrapped with a layer of stainless steel wire mesh, and a tightening ring is installed on the outer side of the stainless steel wire mesh.
[0010] As a preferred embodiment of this utility model, an installation groove is provided on the outer side of the precast concrete pile body, and a connecting rod is installed inside the installation groove. The outer side of the surface of the connecting rod is cast integrally within the polymer concrete layer.
[0011] As a preferred embodiment of this utility model, the bottom of the precast concrete pile body is provided with an enlarged head, which is integrally cast with the precast concrete pile body. The enlarged head is conical with a cone angle between 30-45°, and its side is provided with annular ribs with a height of 5-8 cm and a spacing of 10-15 cm.
[0012] As a preferred embodiment of this utility model, the supporting steel bar is made of high-strength alloy steel, and the injection tank is equipped with a sealing plug made of rubber.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0014] 1. This utility model solves the problem of poor corrosion resistance of existing variable cross-section reinforced concrete precast piles during use, which are easily corroded in saline-alkali areas. Once corrosion occurs, it will cause changes in the strength structure of the variable cross-section reinforced concrete precast pile, reducing the performance of the variable cross-section reinforced concrete precast pile. This invention achieves the effect of corrosion protection and isolation.
[0015] 2. By setting up anti-corrosion and reinforcement components, the spring-shaped support steel bars can play a buffering role when the pile body is under stress, disperse stress concentration, and reduce the damage to the pile body caused by changes in external loads or uneven settlement of the foundation. At the same time, its special structural form increases the bonding area and interlocking force with the polymer concrete layer, making the two work together better. This makes it easier for users to improve the comprehensive mechanical properties and deformation resistance of the pile body, and reduce maintenance costs and risks.
[0016] 3. This utility model, through the setting of anti-corrosion isolation components, provides an anti-corrosion coating with good chemical stability and adhesion, effectively preventing the penetration of corrosive media. The glass fiber reinforced plastic cloth has high strength and corrosion resistance, resisting a certain degree of mechanical damage and chemical erosion, thus enhancing the anti-corrosion effect during use. It can also isolate the polymer concrete layer from external substances, further improving the anti-corrosion effect during use. The stainless steel wire mesh and tightening rings further enhance the overall strength and impact resistance of the protective layer, effectively preventing damage to the protective layer caused by external factors during transportation, construction, and use. This allows users to conveniently achieve all-round protection of the pile body. The polymer concrete layer itself has good chemical stability, which can resist the erosion of chemicals such as acids and alkalis to a certain extent. The polymer concrete layer has a relatively dense structure, which can effectively reduce the penetration of external corrosive media such as salt and alkali solutions, moisture, and oxygen into the internal reinforcing steel. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0018] Figure 2 This is a schematic diagram of the three-dimensional disassembled structure of this utility model;
[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;
[0020] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.
[0021] In the diagram: 1. Precast concrete pile body; 2. Reinforcing steel frame; 3. Corrosion protection and reinforcement components; 31. Supporting reinforcing steel; 33. Polymer concrete layer; 4. Corrosion protection and isolation components; 41. Corrosion protection coating; 42. Fiberglass reinforced plastic cloth; 5. Liquid guiding channel; 6. Liquid injection channel; 7. Stainless steel wire mesh; 8. Tightening ring; 9. Installation groove; 10. Connecting rod; 11. Enlarged head; 12. Sealing plug. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.
[0023] like Figures 1 to 4As shown, the present invention provides a variable cross-section reinforced concrete precast pile, including a precast concrete pile body 1 and a steel reinforcement frame 2. The precast concrete pile body 1 is cast on the steel reinforcement frame 2, which is made of stainless steel. The outside of the precast concrete pile body 1 is provided with an anti-corrosion reinforcement component 3, and the outside of the precast concrete pile body 1 is provided with an anti-corrosion isolation component 4.
[0024] refer to Figure 2 The anti-corrosion reinforcement component 3 includes a supporting steel bar 31, which is spring-shaped, and a polymer concrete layer 33 is poured on the outside of the supporting steel bar 31.
[0025] As a technical optimization of this utility model, by setting the anti-corrosion reinforcement component 3, the spring-shaped support steel bar 31 can play a buffering role when the pile body is under stress, disperse stress concentration, and reduce the damage to the pile body caused by changes in external load or uneven settlement of the foundation. At the same time, its special structural form increases the bonding area and interlocking force with the polymer concrete layer 33, making the two work together better, which makes it easier for users to improve the comprehensive mechanical properties and deformation resistance of the pile body, and reduce maintenance costs and risks.
[0026] refer to Figure 2 The anti-corrosion isolation component 4 includes an anti-corrosion coating 41, which is sprayed on the surface of the polymer concrete layer 33, and the outside of the anti-corrosion coating 41 is wrapped with a glass fiber reinforced plastic cloth 42.
[0027] As a technical optimization of this utility model, by setting up the anti-corrosion isolation component 4, the anti-corrosion coating 41 has good chemical stability and adhesion, which can effectively prevent the penetration of corrosive media. The glass fiber reinforced plastic cloth 42 has high strength and corrosion resistance, which can resist a certain degree of mechanical damage and chemical erosion, thus enhancing the anti-corrosion effect in use. It can also isolate the polymer concrete layer 33 from external substances, further improving the anti-corrosion effect in use. The stainless steel wire mesh 7 and the tightening ring 8 further enhance the overall strength and impact resistance of the protective layer, effectively avoiding damage to the protective layer caused by external factors during transportation, construction and use, making it convenient for users to achieve all-round protection of the pile body. The polymer concrete layer 33 has good chemical stability and can resist the erosion of chemicals such as acids and alkalis to a certain extent. The polymer concrete layer 33 has a relatively dense structure, which can effectively reduce the penetration of external corrosive media such as salt and alkali solutions, water and oxygen into the internal steel bars.
[0028] refer to Figure 2 The supporting steel bar 31 has a hollow liquid guiding groove 5 opened along the axial direction inside, and a liquid injection groove 6 is opened on the top of the liquid guiding groove 5.
[0029] As a technical optimization of this utility model, by setting up a liquid pouring tank and a liquid injection tank 6, the user can conveniently inject anti-corrosion liquid or repair liquid into the supporting steel bar 31 according to the actual use of the pile body and the test results. When local corrosion signs or potential risks appear in the pile body, the timely injected liquid can penetrate into the polymer concrete layer 33 and the tiny cracks inside the pile body through the liquid guiding tank 5, repairing and protecting the potentially corroded parts, enhancing the self-repair ability and corrosion resistance of the pile body, reducing the risk of structural damage caused by corrosion, and improving the reliability and safety of the pile body.
[0030] refer to Figure 2 The outer layer of the glass fiber reinforced plastic cloth 42 is wrapped with a layer of stainless steel wire mesh 7, and a tightening ring 8 is installed on the outer side of the stainless steel wire mesh 7.
[0031] As a technical optimization of this utility model, by setting a stainless steel woven mesh and a tightening ring 8, the high strength and good flexibility of the stainless steel woven mesh allow it to be tightly attached to the outside of the glass fiber reinforced plastic cloth 42, effectively dispersing external impact forces and preventing damage to the protective layer caused by impacts, scratches, etc. The tightening ring 8 further ensures the tight fixation of the stainless steel woven mesh, preventing it from shifting or loosening during use, making it easier for users to enhance the overall stability and anti-damage ability of the pile body protective layer, and ensuring that the protective effect is not reduced in complex environments and long-term use.
[0032] refer to Figure 2 An installation groove 9 is provided on the outer side of the precast concrete pile body 1. A connecting rod 10 is installed inside the installation groove 9. The outer side of the surface of the connecting rod 10 is cast integrally within the polymer concrete layer 33.
[0033] As a technical optimization of this utility model, by setting the installation groove 9 and the connecting rod 10, the connecting rod 10 firmly connects the stainless steel wire mesh 7 to the polymer concrete layer 33, so that the protective layer and the pile body form an organic whole. When subjected to external force, it can better cooperate in bearing the force, avoid the peeling or delamination between the protective layer and the pile body, and facilitate users to improve the integrity and cooperative performance of the pile body structure, and ensure the mechanical properties and protective effect of the pile body.
[0034] refer to Figure 2 The bottom of the precast concrete pile body 1 is provided with an enlarged head 11, which is integrally cast with the precast concrete pile body 1. The enlarged head 11 is conical with a cone angle between 30-45°. Its side is provided with annular ribs with a height of 5-8 cm and a spacing of 10-15 cm.
[0035] As a technical optimization of this utility model, by setting an enlarged head 11, the conical enlarged head 11 increases the contact area between the pile end and the foundation. Under the same foundation conditions, it can significantly improve the end bearing capacity of the pile, enabling the pile body to better transfer the load of the building to the depth of the foundation. The annular ribs on its side further enhance the friction and interlocking force between the enlarged head 11 and the foundation soil, improving the vertical bearing stability of the pile. This allows users to effectively improve the bearing capacity of the pile body under different geological conditions, especially in projects with high bearing requirements, reduce the settlement of the pile body, and ensure the safety and stability of the building.
[0036] refer to Figure 4 The supporting steel bar 31 is made of high-strength alloy steel, and the injection tank 6 is equipped with a sealing plug 12, which is made of rubber.
[0037] As a technical optimization of this utility model, by setting up a supporting steel bar 31 and a sealing plug 12, the supporting steel bar 31 made of high-strength alloy steel ensures its mechanical properties and durability under harsh environments and complex stress conditions, providing reliable support and reinforcement for the pile body. The sealing plug 12 is made of rubber, which can tightly seal the injection tank 6 to prevent impurities from entering.
[0038] The working principle and usage process of this utility model: When the variable cross-section reinforced concrete precast pile is in a complex usage environment, the outermost anti-corrosion coating 41 first comes into direct contact with the external corrosive medium. The special material selected has excellent chemical stability and can be tightly bonded with the polymer concrete layer 33 to form a continuous and dense protective film. This protective film, with its low porosity and high adhesion, effectively prevents the intrusion of salt and alkali solutions, moisture, oxygen and other corrosive chemicals.
[0039] Based on the anti-corrosion coating 41, the glass fiber reinforced plastic cloth 42 further enhances the protective effect. The glass fiber reinforced plastic cloth 42 has high strength and good flexibility. It is tightly wrapped around the outside of the anti-corrosion coating 41, forming a solid physical barrier. It can not only resist a certain degree of mechanical impact, such as collisions and scratches that may be encountered during construction, to prevent damage to the protective layer, but also effectively isolate harmful substances in the external environment from contact with the anti-corrosion coating 41 and the pile body due to its own corrosion resistance. Even under harsh climatic conditions, such as long-term exposure to humid, high-temperature or strong acid and alkali environments, the glass fiber reinforced plastic cloth 42 can maintain its protective performance and ensure that the pile body is not corroded.
[0040] The outer layer of the glass fiber reinforced plastic cloth 42 is wrapped with stainless steel wire mesh 7 and fitted with tightening rings 8. The stainless steel wire mesh 7 has high strength and good toughness. It is tightly attached to the surface of the glass fiber reinforced plastic cloth 42 and can effectively disperse external impact forces. When the pile body is subjected to accidental impact or uneven stress caused by foundation settlement, the stainless steel wire mesh 7 can evenly distribute these forces to the entire protective layer, avoiding local stress concentration that could lead to damage to the protective layer. The tightening rings 8 ensure that the stainless steel wire mesh 7 remains tightly fixed during the long-term use of the pile body, preventing displacement or loosening, thereby maintaining the integrity and protective effect of the protective layer, achieving the effect of anti-corrosion isolation, and enhancing the performance of variable cross-section reinforced concrete precast piles.
[0041] In summary, this new type of variable cross-section reinforced concrete precast pile, by setting up anti-corrosion reinforcement component 3 in conjunction with anti-corrosion isolation component 4 to provide anti-corrosion isolation on the outside of the concrete precast pile body 1, solves the problem that existing variable cross-section reinforced concrete precast piles have poor anti-corrosion performance during use and are easily corroded in saline-alkali areas. Once corrosion occurs, it will cause changes in the strength structure of the variable cross-section reinforced concrete precast pile, reducing the performance of the variable cross-section reinforced concrete precast pile.
[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A variable cross-section reinforced concrete precast pile, comprising a precast concrete pile body (1) and a steel reinforcement frame (2), characterized in that: The precast concrete pile body (1) is cast on the steel reinforcement frame (2), which is made of stainless steel. The precast concrete pile body (1) is provided with anti-corrosion reinforcement components (3) on the outside and anti-corrosion isolation components (4) on the outside.
2. The variable cross-section reinforced concrete precast pile according to claim 1, characterized in that: The corrosion-resistant reinforcement component (3) includes a supporting steel bar (31), which is spring-shaped, and a polymer concrete layer (33) is poured on the outside of the supporting steel bar (31).
3. A precast reinforced concrete pile with variable cross-section according to claim 2, characterized in that: The corrosion protection isolation component (4) includes a corrosion protection coating (41) sprayed on the surface of the polymer concrete layer (33), and the outside of the corrosion protection coating (41) is wrapped with a glass fiber reinforced plastic cloth (42).
4. A precast reinforced concrete pile with variable cross-section according to claim 2, characterized in that: The supporting steel bar (31) has a hollow liquid guiding groove (5) axially formed inside, and a liquid injection groove (6) is formed at the top of the liquid guiding groove (5).
5. A precast reinforced concrete pile with variable cross-section according to claim 3, characterized in that: The outer layer of the glass fiber reinforced plastic cloth (42) is wrapped with a layer of stainless steel wire mesh (7), and a tightening ring (8) is installed on the outer side of the stainless steel wire mesh (7).
6. A precast reinforced concrete pile with variable cross-section according to claim 2, characterized in that: An installation groove (9) is provided on the outer side of the precast concrete pile body (1), and a connecting rod (10) is installed inside the installation groove (9). The outer side of the surface of the connecting rod (10) is cast integrally within the polymer concrete layer (33).
7. A precast reinforced concrete pile with variable cross-section according to claim 1, characterized in that: The bottom of the precast concrete pile body (1) is provided with an enlarged head (11). The enlarged head (11) is integrally cast with the precast concrete pile body (1). The enlarged head (11) is conical with a cone angle between 30-45°. It has annular ribs on its side with a height of 5-8 cm and a spacing of 10-15 cm.
8. A precast reinforced concrete pile with variable cross-section according to claim 4, characterized in that: The supporting steel bar (31) is made of high-strength alloy steel, and the injection tank (6) is equipped with a sealing plug (12), which is made of rubber.